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Tilcon Connecticut, Inc.

Crushed And Broken Stone, Branford, Connecticut. NPDES permit CT0000906 expired May 31, 2015; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 31 days after each period: form 1 monthly (20 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 (22)

ParameterStatisticLimitMonths
Turbidityinstantaneous maximumreport only (NTU)Mar, Jun, Sep, Dec
Turbidityinstantaneous maximumreport only (NTU)Mar, Jun, Sep, Dec
pHinstantaneous minimum≥ 6 SUMar, Jun, Sep, Dec
pHinstantaneous maximum≤ 9 SUMar, Jun, Sep, Dec
Salinityinstantaneous maximumreport only (ppt)Mar, Jun, Sep, Dec
Solids, total suspendedinstantaneous maximum≤ 23 mg/LMar, Jun, Sep, Dec
Solids, total suspendedinstantaneous maximumreport only (mg/L)Mar, Jun, Sep, Dec
Copper, total [as Cu]instantaneous maximumreport only (ug/L)Mar, Jun, Sep, Dec
Iron, total [as Fe]instantaneous maximumreport only (ug/L)Mar, Jun, Sep, Dec
Lead, total [as Pb]instantaneous maximumreport only (ug/L)Mar, Jun, Sep, Dec
Nickel, total [as Ni]instantaneous maximumreport only (ug/L)Mar, Jun, Sep, Dec
Aluminum, total [as Al]instantaneous maximumreport only (ug/L)Mar, Jun, Sep, Dec
Oil petroleum, total recoverableinstantaneous maximumreport only (mg/L)Mar, Jun, Sep, Dec
Surfactants [MBAS]instantaneous maximumreport only (mg/L)Mar, Jun, Sep, Dec
Flow, maximum during 24 hr perioddaily maximum≤ 1744500 gal/dMar, Jun, Sep, Dec
Chlorine, total residualinstantaneous maximumreport only (ug/L)Mar, Jun, Sep, Dec
Flowdaily maximum≤ 1744500 gal/dMar, Jun, Sep, Dec
Flow, totaldaily maximum≤ 1344000 gal/dMar, Jun, Sep, Dec
Noael Static 48Hr Acute Mysid. Bahiainstantaneous minimum≥ 90 %Mar, Jun, Sep, Dec
Noael Static 48Hr Acute Mysid. Bahiainstantaneous minimumreport only (%)Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
NOAEL Static 48Hr Acute Cyprinodon variegatusinstantaneous minimumreport only (%)Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
NOAEL Static 48Hr Acute Cyprinodon variegatusinstantaneous minimum≥ 90 %Mar, Jun, Sep, Dec

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.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CT0000906 · MCP: https://passage-data.com/mcp