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Northstar 41 LLC

Commercial Physical Research, Chazy, Town Of, New York. NPDES permit NY0296520, in force until Jan 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (30 values), form T quarterly
Renewal application due
Aug 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 13 reports late

Limits in force (44)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Flow ratemonthly averagereport only (gal/d)all year
Flow ratedaily maximum≤ 117000 gal/dall year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendeddaily maximum≤ 40 mg/Lall year
Solids, total suspendedmonthly average≤ 20 lb/dall year
Solids, total suspendeddaily maximum≤ 39 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, settleabledaily maximum≤ .1 mL/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 11 mg/LJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 18 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jun–Oct
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 10 lb/dJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 17 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jun–Oct
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Apr, May, Nov, Dec
Phosphorus, total [as P]monthly average≤ .5 mg/Lall year
Phosphorus, total [as P]rolling averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]rolling average≤ .4 lb/dall year
Chlorine, total residualdaily maximum≤ .036 mg/Lall year
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1.7 tox acute (alert, not enforceable)all year
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 7.2 tox chronic (alert, not enforceable)all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1.7 tox acute (alert, not enforceable)all year
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 7.2 tox chronic (alert, not enforceable)all year
Mercury, total [as Hg]daily maximum≤ 50 ng/Lall year
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Oct
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)Jun–Oct
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 5 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)Jun–Oct
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 4.9 lb/dJun–Oct
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 29 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)Jun–Oct
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)Jun–Oct
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, May, Nov, Dec

How strict are these limits?

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

Same industry: the 9 Engineering, Accounting, Research and Management Services permits in New York.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NY0296520 · MCP: https://passage-data.com/mcp