{"permit":"CT0030597","name":"Tilcon Connecticut, Inc.","state":"CT","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/CT0030597"},"about":[{"label":"What it is","text":"Industrial or other facility"},{"label":"Where","text":"Plainfield, Connecticut","href":"https://www.openstreetmap.org/?mlat=41.741389&mlon=-71.890833#map=14/41.741389/-71.890833"},{"label":"Last 12 months","text":"No values over a limit. 2 of 11 reports filed late"},{"label":"Permit","text":"Expired Feb 28, 2022; its limits still apply until a new permit is issued, and EPA still expects the reports"}],"renewal_due":null,"renewal_check":{"offered_because":"permit_expired","application_due":"2021-09-01","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/CT0030597#renewal","says":"Each limit a renewal could tighten or add, from the state's water-quality standards and the federal rules for this kind of discharge, each cited to its rule, beside EPA's 12-month record; a rule we do not hold is named, never guessed. A person orders it on the permit's page with their email; it is sent by email within 5 business days."},"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":0,"over_by":[],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"101","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"instantaneous maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"Oil & Grease","parameter_code":"00556","statistic":"instantaneous maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"Nitrogen, total [as N]","parameter_code":"00600","statistic":"instantaneous maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"Nitrogen, nitrate total [as N]","parameter_code":"00620","statistic":"instantaneous maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"Nitrogen, Kjeldahl, total [as N]","parameter_code":"00625","statistic":"instantaneous maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"instantaneous maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"Copper, total [as Cu]","parameter_code":"01042","statistic":"instantaneous maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"Zinc, total [as Zn]","parameter_code":"01092","statistic":"instantaneous maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"Aluminum, total [as Al]","parameter_code":"01105","statistic":"instantaneous maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"pH, maximum","parameter_code":"61941","statistic":"instantaneous maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"pH, minimum","parameter_code":"61942","statistic":"instantaneous minimum","qualifier":">=","value":"6","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"Chemical Oxygen Demand [COD]","parameter_code":"81017","statistic":"instantaneous maximum","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"NOAEL Static 48Hr Acute D. pulex","parameter_code":"TDA3D","statistic":"instantaneous minimum","qualifier":">=","value":"90","unit":"%","report_only":false,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"},{"outfall":"101","parameter":"NOAEL Static 48Hr Acute Pimephales promelas","parameter_code":"TDA6C","statistic":"instantaneous minimum","qualifier":">=","value":"90","unit":"%","report_only":false,"enforceable":true,"months":"all","limit_set":"Mine Dewatering Water"}],"next":[{"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":"CT0030597"},"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=CT0030597"},{"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":"CT0030597"},"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=CT0030597"}]}