EPA — U.S. Environmental Protection Agency
ELG — Effluent Guidelines Search

WaterSense Effluent Limitations Guidelines search across point source categories, pollutants, and treatment technologies.
Documentation GitHub OpenAPI
OpenAPI Specification

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  "info": {
    "title": "U.S. EPA WaterSense",
    "description": "placeholder",
    "contact": {
      "name": "US EPA, ELG"
    },
    "license": {
      "name": "Creative Commons Zero Public Domain Dedication",
      "url": "https://edg.epa.gov/EPA_Data_License.html"
    },
    "version": "0.0.0"
  },
  "security": [
    {
      "basicAuth": []
    }
  ],
  "paths": {
    "/api/pointSourceCategories": {
      "get": {
        "summary": "Point Source Categories",
        "description": "Placeholder",
        "tags": [
          "Point Source Categories"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pointSourceCategory.list"
                },
                "examples": {
                  "get_api_pointSourceCategories200Example": {
                    "summary": "Default get_api_pointSourceCategories 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/pointSourceCategory/{id}": {
      "get": {
        "summary": "Point Source Category ID",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "integer"
            },
            "example": 0
          }
        ],
        "tags": [
          "Point Source Categories"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pointSourceCategory.read"
                },
                "examples": {
                  "get_api_pointSourceCategory_{id}200Example": {
                    "summary": "Default get_api_pointSourceCategory_{id} 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
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      }
    },
    "/api/pointSourceCategoryCfr/{id}": {
      "get": {
        "summary": "Point Source Category CFR ID",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "integer"
            },
            "example": 0
          }
        ],
        "tags": [
          "Point Source Categories"
        ],
        "responses": {
          "200": {
            "description": "Placeholder.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pointSourceCategory.cfr"
                },
                "examples": {
                  "get_api_pointSourceCategoryCfr_{id}200Example": {
                    "summary": "Default get_api_pointSourceCategoryCfr_{id} 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
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      }
    },
    "/api/pointSourceCategoryDefinitions/{id}": {
      "get": {
        "summary": "Point Source Category Definitions ID",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "integer"
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            "example": 0
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        ],
        "tags": [
          "Point Source Categories"
        ],
        "responses": {
          "200": {
            "description": "Placeholder.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pointSourceCategory.definitions"
                },
                "examples": {
                  "get_api_pointSourceCategoryDefinitions_{id}200Example": {
                    "summary": "Default get_api_pointSourceCategoryDefinitions_{id} 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/pointSourceCategoryCitationHistory/{id}": {
      "get": {
        "summary": "Point Source Category Citation History ID",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "integer"
            },
            "example": 0
          }
        ],
        "tags": [
          "Point Source Categories"
        ],
        "responses": {
          "200": {
            "description": "Placeholder.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pointSourceCategory.citationHistory"
                },
                "examples": {
                  "get_api_pointSourceCategoryCitationHistory_{id}200Example": {
                    "summary": "Default get_api_pointSourceCategoryCitationHistory_{id} 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/pointSourceSubcategory/{id}": {
      "get": {
        "summary": "Point Source Category Subcategory ID",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "integer"
            },
            "example": 0
          }
        ],
        "tags": [
          "Point Source Categories"
        ],
        "responses": {
          "200": {
            "description": "Placeholder.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pointSourceSubcategory.read"
                },
                "examples": {
                  "get_api_pointSourceSubcategory_{id}200Example": {
                    "summary": "Default get_api_pointSourceSubcategory_{id} 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/wastestreamProcessLimitations": {
      "get": {
        "summary": "Point Source Category Wastestream Process Limitations",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "query",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "integer"
            },
            "example": 0
          },
          {
            "$ref": "#/components/parameters/download"
          }
        ],
        "tags": [
          "Point Source Categories"
        ],
        "responses": {
          "200": {
            "description": "Placeholder.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/wastestreamProcess.limitations"
                },
                "examples": {
                  "get_api_wastestreamProcessLimitations200Example": {
                    "summary": "Default get_api_wastestreamProcessLimitations 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/pollutants": {
      "get": {
        "summary": "Pollutants",
        "description": "Placeholder",
        "tags": [
          "Pollutants"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pollutant.list"
                },
                "examples": {
                  "get_api_pollutants200Example": {
                    "summary": "Default get_api_pollutants 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/pollutantCategories": {
      "get": {
        "summary": "Pollutant Categories",
        "description": "Placeholder",
        "tags": [
          "Pollutants"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pollutant.listCategories"
                },
                "examples": {
                  "get_api_pollutantCategories200Example": {
                    "summary": "Default get_api_pollutantCategories 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
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          "dispatcher": "FALLBACK"
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      }
    },
    "/api/pollutant": {
      "get": {
        "summary": "Pollutant",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "query",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "string",
              "enum": [
                "BOD5",
                "TSS",
                "pH",
                "Pentachlorophenol",
                "Trichlorophenol",
                "Oil & Grease",
                "TCDD",
                "TCDF",
                "Chloroform (Trichloromethane)",
                "Trichlorosyringol"
              ]
            },
            "example": "BOD5"
          },
          {
            "$ref": "#/components/parameters/download"
          }
        ],
        "tags": [
          "Pollutants"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pollutant.read"
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                "examples": {
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                    "summary": "Default get_api_pollutant 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
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                }
              }
            }
          }
        },
        "x-microcks-operation": {
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          "dispatcher": "FALLBACK"
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      }
    },
    "/api/pollutantCategory": {
      "get": {
        "summary": "Pollutant Category",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "query",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "integer"
            },
            "example": 0
          },
          {
            "$ref": "#/components/parameters/download"
          }
        ],
        "tags": [
          "Pollutants"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pollutant.readCategory"
                },
                "examples": {
                  "get_api_pollutantCategory200Example": {
                    "summary": "Default get_api_pollutantCategory 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
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                }
              }
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          }
        },
        "x-microcks-operation": {
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          "dispatcher": "FALLBACK"
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      }
    },
    "/api/pollutantLimitations": {
      "get": {
        "summary": "Pollutant Limitations",
        "description": "Placeholder",
        "parameters": [
          {
            "$ref": "#/components/parameters/pollutantId"
          },
          {
            "$ref": "#/components/parameters/pointSourceCategoryCode"
          },
          {
            "$ref": "#/components/parameters/download"
          }
        ],
        "tags": [
          "Pollutants"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/pollutant.limitations"
                },
                "examples": {
                  "get_api_pollutantLimitations200Example": {
                    "summary": "Default get_api_pollutantLimitations 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/limitation": {
      "get": {
        "summary": "Limitation",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "query",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "integer"
            },
            "example": 0
          },
          {
            "$ref": "#/components/parameters/download"
          }
        ],
        "tags": [
          "Pollutants"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/limitation.read"
                },
                "examples": {
                  "get_api_limitation200Example": {
                    "summary": "Default get_api_limitation 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
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          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/treatmentTechnologies": {
      "get": {
        "summary": "Treatment Technologies",
        "description": "Placeholder",
        "tags": [
          "Treatment Technologies"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/treatmentTechnology.list"
                },
                "examples": {
                  "get_api_treatmentTechnologies200Example": {
                    "summary": "Default get_api_treatmentTechnologies 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
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    "/api/treatmentTechnologyCategories": {
      "get": {
        "summary": "Treatment Technology Categories",
        "description": "Placeholder",
        "tags": [
          "Treatment Technologies"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/treatmentTechnology.listCategories"
                },
                "examples": {
                  "get_api_treatmentTechnologyCategories200Example": {
                    "summary": "Default get_api_treatmentTechnologyCategories 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
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    },
    "/api/treatmentTechnology/{id}": {
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        "summary": "Treatment Technology",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "string",
              "enum": [
                "AAFF",
                "ABSM",
                "AC",
                "ADSM",
                "AFF",
                "AIR",
                "AKH",
                "ANSG",
                "AOP",
                "ASG",
                "AST",
                "BIO",
                "BMP",
                "CD",
                "CLAR",
                "CND",
                "CO",
                "COAGFL",
                "CS",
                "ChemPre",
                "DAF",
                "DCL",
                "DENIT",
                "DGF",
                "DRY",
                "DST",
                "DWI",
                "EC",
                "EMUL",
                "EQ",
                "EVAP",
                "FI",
                "FILT",
                "GAC",
                "GravS",
                "HAUL",
                "ION",
                "LE",
                "LRTR",
                "MF",
                "MPT",
                "NANO",
                "NIT",
                "OST",
                "OTHER",
                "OW",
                "OWS",
                "PestActIng",
                "REDX",
                "REUSE",
                "RO",
                "SI",
                "ST",
                "THERMAL",
                "UF",
                "ZLD"
              ]
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            "example": "AAFF"
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        ],
        "tags": [
          "Treatment Technologies"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/treatmentTechnology.read"
                },
                "examples": {
                  "get_api_treatmentTechnology_{id}200Example": {
                    "summary": "Default get_api_treatmentTechnology_{id} 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
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    },
    "/api/treatmentTechnologyCategory/{id}": {
      "get": {
        "summary": "Treatment Technology Category",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "string",
              "enum": [
                "Physical, Not Elsewhere Classified",
                "Other",
                "Chemical",
                "Biological",
                "Thermal",
                "Filtration",
                "Sorption",
                "Membrane"
              ]
            },
            "example": "Physical, Not Elsewhere Classified"
          }
        ],
        "tags": [
          "Treatment Technologies"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/treatmentTechnology.readCategory"
                },
                "examples": {
                  "get_api_treatmentTechnologyCategory_{id}200Example": {
                    "summary": "Default get_api_treatmentTechnologyCategory_{id} 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
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        },
        "x-microcks-operation": {
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          "dispatcher": "FALLBACK"
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    },
    "/api/treatmentTechnologyLimitations": {
      "get": {
        "summary": "Treatment Technology Limitations",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "query",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "string",
              "enum": [
                "AAFF",
                "ABSM",
                "AC",
                "ADSM",
                "AFF",
                "AIR",
                "AKH",
                "ANSG",
                "AOP",
                "ASG",
                "AST",
                "BIO",
                "BMP",
                "CD",
                "CLAR",
                "CND",
                "CO",
                "COAGFL",
                "CS",
                "ChemPre",
                "DAF",
                "DCL",
                "DENIT",
                "DGF",
                "DRY",
                "DST",
                "DWI",
                "EC",
                "EMUL",
                "EQ",
                "EVAP",
                "FI",
                "FILT",
                "GAC",
                "GravS",
                "HAUL",
                "ION",
                "LE",
                "LRTR",
                "MF",
                "MPT",
                "NANO",
                "NIT",
                "OST",
                "OTHER",
                "OW",
                "OWS",
                "PestActIng",
                "REDX",
                "REUSE",
                "RO",
                "SI",
                "ST",
                "THERMAL",
                "UF",
                "ZLD"
              ]
            },
            "example": "AAFF"
          },
          {
            "$ref": "#/components/parameters/treatmentId"
          },
          {
            "$ref": "#/components/parameters/pointSourceCategoryCode"
          },
          {
            "name": "pollutantId",
            "in": "query",
            "description": "Placeholder.",
            "required": false,
            "schema": {
              "type": "string",
              "enum": [
                "BOD5",
                "TSS",
                "pH",
                "Pentachlorophenol",
                "Trichlorophenol",
                "Oil & Grease",
                "TCDD",
                "TCDF",
                "Chloroform (Trichloromethane)",
                "Trichlorosyringol"
              ]
            },
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          {
            "$ref": "#/components/parameters/download"
          },
          {
            "$ref": "#/components/parameters/sortCol"
          },
          {
            "$ref": "#/components/parameters/sortDir"
          },
          {
            "$ref": "#/components/parameters/offset"
          },
          {
            "$ref": "#/components/parameters/limit"
          }
        ],
        "tags": [
          "Treatment Technologies"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/treatmentTechnology.limitations"
                },
                "examples": {
                  "get_api_treatmentTechnologyLimitations200Example": {
                    "summary": "Default get_api_treatmentTechnologyLimitations 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
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        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/treatmentTechnologyCategoryLimitations": {
      "get": {
        "summary": "Treatment Technology Category Limitations",
        "description": "Placeholder",
        "parameters": [
          {
            "name": "id",
            "in": "query",
            "description": "Placeholder.",
            "required": true,
            "schema": {
              "type": "string",
              "enum": [
                "Physical, Not Elsewhere Classified",
                "Other",
                "Chemical",
                "Biological",
                "Thermal",
                "Filtration",
                "Sorption",
                "Membrane"
              ]
            },
            "example": "Physical, Not Elsewhere Classified"
          },
          {
            "$ref": "#/components/parameters/treatmentId"
          },
          {
            "$ref": "#/components/parameters/pointSourceCategoryCode"
          },
          {
            "name": "pollutantId",
            "in": "query",
            "description": "Placeholder.",
            "required": false,
            "schema": {
              "type": "string",
              "enum": [
                "BOD5",
                "TSS",
                "pH",
                "Pentachlorophenol",
                "Trichlorophenol",
                "Oil & Grease",
                "TCDD",
                "TCDF",
                "Chloroform (Trichloromethane)",
                "Trichlorosyringol"
              ]
            },
            "example": "BOD5"
          },
          {
            "$ref": "#/components/parameters/download"
          },
          {
            "$ref": "#/components/parameters/sortCol"
          },
          {
            "$ref": "#/components/parameters/sortDir"
          },
          {
            "$ref": "#/components/parameters/offset"
          },
          {
            "$ref": "#/components/parameters/limit"
          }
        ],
        "tags": [
          "Treatment Technologies"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/treatmentTechnology.categoryLimitations"
                },
                "examples": {
                  "get_api_treatmentTechnologyCategoryLimitations200Example": {
                    "summary": "Default get_api_treatmentTechnologyCategoryLimitations 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/multiCriteriaSearchCriteria": {
      "get": {
        "summary": "Multi Criteria Search Criteria",
        "description": "Placeholder",
        "tags": [
          "Custom Search"
        ],
        "responses": {
          "200": {
            "description": "Placeholder",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/customSearch.multiCriteriaSearchCriteria"
                },
                "examples": {
                  "get_api_multiCriteriaSearchCriteria200Example": {
                    "summary": "Default get_api_multiCriteriaSearchCriteria 200 response",
                    "x-microcks-default": true,
                    "value": {
                      "status": "ok",
                      "message": "Example response"
                    }
                  }
                }
              }
            }
          }
        },
        "x-microcks-operation": {
          "delay": 0,
          "dispatcher": "FALLBACK"
        }
      }
    },
    "/api/multiCriteriaSearch": {
      "get": {
        "summary": "Multi Criteria Search",
        "description": "Placeholder",
        "parameters": [
          {
            "$ref": "#/components/parameters/pointSourceCategoryCode"
          },
          {
            "name": "sicCode",
            "in": "query",
            "description": "Placeholder.",
            "required": false,
            "schema": {
              "type": "integer"
            },
            "example": 0
          },
          {
            "name": "naicsCode",
            "in": "query",
            "description": "Placeholder.",
            "required": false,
            "schema": {
              "type": "integer"
            },
            "example": 0
          },
          {
            "name": "pollutantId",
            "in": "query",
            "description": "Placeholder.",
            "required": false,
            "schema": {
              "type": "string",
   

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# Full source: https://raw.githubusercontent.com/api-evangelist/epa/refs/heads/main/openapi/elg-search-openapi.json
ELG — Effluent Guidelines Search

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