{"permit":"TN0000931","name":"Darling Ingredients Inc.","state":"TN","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/TN0000931"},"about":[{"label":"What it is","text":"Animal And Marine Fats And Oils (EPA's industry listing)"},{"label":"Where","text":"Union City, Tennessee","href":"https://www.openstreetmap.org/?mlat=36.398775&mlon=-88.995583#map=14/36.398775/-88.995583"},{"label":"Last 12 months","text":"No values over a limit"},{"label":"Permit","text":"In force until Aug 31, 2030"}],"renewal_due":null,"renewal_check":null,"sector":{"state":"TN","sic":"20","permits":13,"list":"https://passage-data.com/api/v1/permits?state=TN&sic=20","page":"https://passage-data.com/dmr/s/TN/20"},"limits_from_version":null,"record":{"last_filed":"2026-09-30","over":0,"over_by":[],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"monthly average","qualifier":"<=","value":"10.5","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"daily maximum","qualifier":"<=","value":"15.8","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"minimum","qualifier":">=","value":"6","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":"<=","value":"220","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily maximum","qualifier":"<=","value":"440","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":"<=","value":"132","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily maximum","qualifier":"<=","value":"264","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":"<=","value":"44","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily maximum","qualifier":"<=","value":"88","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"monthly average","qualifier":"<=","value":"134","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"daily maximum","qualifier":"<=","value":"194","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"monthly average","qualifier":"<=","value":"5.3","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"8.8","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Oil and grease","parameter_code":"03582","statistic":"monthly average","qualifier":"<=","value":"100","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Oil and grease","parameter_code":"03582","statistic":"daily maximum","qualifier":"<=","value":"200","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Oil and grease","parameter_code":"03582","statistic":"monthly average","qualifier":"<=","value":"60","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Oil and grease","parameter_code":"03582","statistic":"daily maximum","qualifier":"<=","value":"120","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Oil and grease","parameter_code":"03582","statistic":"monthly average","qualifier":"<=","value":"20","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Oil and grease","parameter_code":"03582","statistic":"daily maximum","qualifier":"<=","value":"40","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Floating solids, waste or visible foam-visual","parameter_code":"45613","statistic":"monthly average","qualifier":null,"value":null,"unit":"N=0;Y=1","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Floating solids, waste or visible foam-visual","parameter_code":"45613","statistic":"daily maximum","qualifier":null,"value":null,"unit":"N=0;Y=1","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"monthly average","qualifier":"<=","value":"126","unit":"#/100mL","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"daily maximum","qualifier":"<=","value":"410","unit":"#/100mL","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"UV Light Working","parameter_code":"51504","statistic":"monthly average","qualifier":null,"value":null,"unit":"pass=0;fail=1","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"001","parameter":"Coliform, fecal general","parameter_code":"74055","statistic":"daily maximum","qualifier":"<=","value":"400","unit":"MPN/100mL","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 001"},{"outfall":"01A","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Land Application Site 01A"},{"outfall":"01A","parameter":"pH","parameter_code":"00400","statistic":"value","qualifier":null,"value":null,"unit":"SU","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Land Application Site 01A"},{"outfall":"01A","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Land Application Site 01A"},{"outfall":"01A","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"monthly total","qualifier":null,"value":null,"unit":"lb/mo","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Land Application Site 01A"},{"outfall":"01A","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Land Application Site 01A"},{"outfall":"01A","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Land Application Site 01A"},{"outfall":"01A","parameter":"Nitrogen, Kjeldahl, total [as N]","parameter_code":"00625","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Land Application Site 01A"},{"outfall":"01A","parameter":"Nitrite + Nitrate total [as N]","parameter_code":"00630","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Land Application Site 01A"},{"outfall":"01A","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly total","qualifier":null,"value":null,"unit":"gal/mo","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Land Application Site 01A"},{"outfall":"01A","parameter":"E. coli","parameter_code":"51040","statistic":"daily maximum","qualifier":null,"value":null,"unit":"#/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Land Application Site 01A"},{"outfall":"SW3","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW3"},{"outfall":"SW3","parameter":"pH","parameter_code":"00400","statistic":"value","qualifier":null,"value":null,"unit":"SU","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW3"},{"outfall":"SW3","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW3"},{"outfall":"SW3","parameter":"Nitrite + Nitrate total [as N]","parameter_code":"00630","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW3"},{"outfall":"SW3","parameter":"Oil and grease","parameter_code":"03582","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW3"},{"outfall":"SW3","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW3"},{"outfall":"SW3","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW3"},{"outfall":"SW3","parameter":"E. coli","parameter_code":"51040","statistic":"daily maximum","qualifier":null,"value":null,"unit":"#/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW3"},{"outfall":"SW3","parameter":"Coliform, fecal general","parameter_code":"74055","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MPN/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW3"},{"outfall":"SW3","parameter":"Chemical Oxygen Demand [COD]","parameter_code":"81017","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW3"},{"outfall":"SW4A","parameter":"BOD, 5-day, 20 deg. C","parameter_code":"00310","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW4A"},{"outfall":"SW4A","parameter":"pH","parameter_code":"00400","statistic":"value","qualifier":null,"value":null,"unit":"SU","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW4A"},{"outfall":"SW4A","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW4A"},{"outfall":"SW4A","parameter":"Nitrite + Nitrate total [as N]","parameter_code":"00630","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW4A"},{"outfall":"SW4A","parameter":"Oil and grease","parameter_code":"03582","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW4A"},{"outfall":"SW4A","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW4A"},{"outfall":"SW4A","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW4A"},{"outfall":"SW4A","parameter":"E. coli","parameter_code":"51040","statistic":"daily maximum","qualifier":null,"value":null,"unit":"#/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW4A"},{"outfall":"SW4A","parameter":"Coliform, fecal general","parameter_code":"74055","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MPN/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW4A"},{"outfall":"SW4A","parameter":"Chemical Oxygen Demand [COD]","parameter_code":"81017","statistic":"daily maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Quarterly Reporting for Outfall SW4A"},{"outfall":"SW4B","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4B"},{"outfall":"SW4B","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4B"},{"outfall":"SW4B","parameter":"E. coli","parameter_code":"51040","statistic":"daily maximum","qualifier":null,"value":null,"unit":"#/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4B"},{"outfall":"SW4B","parameter":"Coliform, fecal general","parameter_code":"74055","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MPN/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4B"},{"outfall":"SW4D","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4D"},{"outfall":"SW4D","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4D"},{"outfall":"SW4D","parameter":"E. coli","parameter_code":"51040","statistic":"daily maximum","qualifier":null,"value":null,"unit":"#/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4D"},{"outfall":"SW4D","parameter":"Coliform, fecal general","parameter_code":"74055","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MPN/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4D"},{"outfall":"SW4E","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4E"},{"outfall":"SW4E","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4E"},{"outfall":"SW4E","parameter":"E. coli","parameter_code":"51040","statistic":"daily maximum","qualifier":null,"value":null,"unit":"#/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4E"},{"outfall":"SW4E","parameter":"Coliform, fecal general","parameter_code":"74055","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MPN/100mL","report_only":true,"enforceable":true,"months":"all","limit_set":"Annual Reporting for Outfall SW4E"}],"next":[{"tool":"list_permits","says":"Screening this industry? list_permits lists every permit of it in this state in one call, each with its page and its get_permit address; `get` is the address to fetch.","arguments":{"state":"TN","sic":"20"},"needs":{},"get":"https://passage-data.com/api/v1/permits?state=TN&sic=20","url":"https://passage-data.com/api/v1/permits?state=TN&sic=20","page":"https://passage-data.com/dmr/s/TN/20"},{"tool":"check_dmr","says":"Before your user files this permit's DMR: check_dmr sets each value beside the permit's limit for that period, with EPA's violation rule's verdict.","arguments":{"permit":"TN0000931"},"needs":{"period_end":"The reporting period: its month (2026-09).","values":"The period's values as your user will file them: [{outfall, parameter, statistic, value, unit}, ...]."},"post":"/api/v1/dmr/check","url":"https://passage-data.com/api/v1/dmr/check","page":"https://passage-data.com/dmr/?permit=TN0000931"},{"tool":"fill_dmr","says":"Has your user the plant's raw daily results? fill_dmr computes the period's DMR values from them, each with the rows it came from.","arguments":{"permit":"TN0000931"},"needs":{"period_end":"The reporting period: its month (2026-09).","rows":"The plant's results: [{date, parameter, value, unit, point}, ...]; or `table`, the lab's or plant's export as text."},"post":"/api/v1/dmr/fill","url":"https://passage-data.com/api/v1/dmr/fill","page":"https://passage-data.com/dmr/?permit=TN0000931"}]}