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Tilcon Connecticut, Inc.

Industrial or other facility, Plainfield, Connecticut. NPDES permit CT0030597 expired Feb 28, 2022; its limits still apply. Last 12 months: no values over a limit, 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 31 days after each period: form 1 monthly (14 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (14)

ParameterStatisticLimitMonths
Solids, total suspendedinstantaneous maximumreport only (mg/L)all year
Oil & Greaseinstantaneous maximumreport only (mg/L)all year
Nitrogen, total [as N]instantaneous maximumreport only (mg/L)all year
Nitrogen, nitrate total [as N]instantaneous maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]instantaneous maximumreport only (mg/L)all year
Phosphorus, total [as P]instantaneous maximumreport only (mg/L)all year
Copper, total [as Cu]instantaneous maximumreport only (mg/L)all year
Zinc, total [as Zn]instantaneous maximumreport only (mg/L)all year
Aluminum, total [as Al]instantaneous maximumreport only (mg/L)all year
pH, maximuminstantaneous maximum≤ 9 SUall year
pH, minimuminstantaneous minimum≥ 6 SUall year
Chemical Oxygen Demand [COD]instantaneous maximumreport only (mg/L)all year
NOAEL Static 48Hr Acute D. pulexinstantaneous minimum≥ 90 %all year
NOAEL Static 48Hr Acute Pimephales promelasinstantaneous minimum≥ 90 %all year

Cited limits by parameter: Connecticut's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CT0030597 · MCP: https://passage-data.com/mcp