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Tilcon Connecticut, Inc.

Crushed And Broken Stone, North Branford, Connecticut. NPDES permit CT0000892 expired Mar 31, 2023; its limits still apply. Last 12 months: no values over a limit, 3 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 31 days after each period: form 1 monthly (24 values), form A monthly (10 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (34)

ParameterStatisticLimitMonths
Flow rateinstantaneous maximumreport only (gal/min)all year
Flow ratedaily maximumreport only (gal/min)all year
Turbidityinstantaneous maximumreport only (NTU)all year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
pHinstantaneous maximumreport only (SU)all year
Solids, total suspendedinstantaneous maximum≤ 20 mg/Lall year
Oil & Greaseinstantaneous maximum≤ 5 mg/Lall 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
Phosphorus, dissolvedinstantaneous maximumreport only (mg/L)all year
Sodium, total [as Na]instantaneous maximumreport only (mg/L)all year
Arsenic, total [as As]instantaneous maximumreport only (mg/L)all year
Copper, total [as Cu]instantaneous maximumreport only (mg/L)all year
Copper, total [as Cu]instantaneous maximumreport only (mg/L)all year
Iron, total [as Fe]instantaneous maximumreport only (mg/L)all year
Iron, total [as Fe]instantaneous maximumreport only (mg/L)all year
Lead, total [as Pb]instantaneous maximumreport only (mg/L)all year
Zinc, total [as Zn]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
Aluminum, total [as Al]instantaneous maximumreport only (mg/L)all year
Flow, maximum during 24 hr perioddaily maximum≤ 2 MGDall year
Flow, maximum during 24 hr perioddaily maximum≤ 168000 gal/dall year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Solids, total dissolvedinstantaneous maximumreport only (mg/L)all year
Flowdaily maximum≤ 2 MGDall year
Flowdaily maximum≤ 168000 gal/dall year
Duration of dischargedaily maximumreport only (hr/d)all year
NOAEL Static 48Hr Acute D. pulexinstantaneous minimum≥ 90 %all year
NOAEL Static 48Hr Acute Pimephales promelasinstantaneous minimum≥ 90 %all year

How strict are these limits?

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

Same industry: the 5 Mining and Quarrying of Nonmetallic Minerals permits in Connecticut.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CT0000892 · MCP: https://passage-data.com/mcp