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Chatham (V)

Sewage treatment plant, Chatham, New York. NPDES permit NY0023582, in force until Oct 31, 2030. Last 12 months: over a limit 2 times (last January 2026), 8 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (22 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 20 required values missing, 11 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], monthly average< 4.5 mg/L≤ .9 mg/L400%
January 2026Nitrogen, ammonia total [as N], monthly average6.2 mg/L≤ 4.7 mg/L32%

Limits in force (31)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 21 deg C (alert, not enforceable)all year
Oxygen demand, ultimatemonthly average≤ 80 mg/LJan, Feb, Mar, Apr, Nov, Dec
Oxygen, dissolved [DO]daily minimum≥ 7 mg/Lall year
BOD, 5-day, 20 deg. C7-day average≤ 5 mg/LMay–Oct
BOD, 5-day, 20 deg. C7-day average≤ 23 lb/dMay–Oct
BOD, 5-day, 20 deg. C7-day averagereport only (mg/L)May–Oct
BOD, 5-day, 20 deg. C7-day averagereport only (lb/d)May–Oct
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 91 lb/dall year
Solids, total suspended7-day average≤ 137 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≤ .9 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 4.7 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Flow, in conduit or thru treatment plantmonthly average≤ .548 MGDall year
Chlorine, total residualdaily maximum≤ .03 mg/LMay–Oct
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 average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 114 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]7-day average≤ 183 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: New York'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/NY0023582 · MCP: https://passage-data.com/mcp