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Berwick Sewer District

Sewage treatment plant, major discharger, Berwick, Maine. NPDES permit ME0101397, in force until Jun 30, 2030. Last 12 months: over a limit once (last February 2026), 20 required values missing, 2 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (53 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 1 of 12 reports late

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

Period endingParameterReportedLimitOver by
February 2026E. coli, thermotol, MF, MTEC, daily maximum686 #/100mL≤ 236 #/100mL191%

Limits in force (69)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 6.5 mg/LJun–Sep
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/LJun–Sep
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 17 mg/LJun–Sep
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 87 lb/dJun–Sep
BOD, 5-day, 20 deg. Cmonthly average≤ 275 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 146 lb/dJun–Sep
BOD, 5-day, 20 deg. Cdaily maximum≤ 459 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LJun–Sep
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 131 lb/dJun–Sep
BOD, 5-day, 20 deg. Cweekly average≤ 413 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 14 mg/LJun–Sep
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendeddaily maximum≤ 23 mg/LJun–Sep
Solids, total suspendeddaily maximum≤ 50 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendedmonthly average≤ 126 lb/dJun–Sep
Solids, total suspendedmonthly average≤ 275 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendeddaily maximum≤ 212 lb/dJun–Sep
Solids, total suspendeddaily maximum≤ 459 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendedweekly average≤ 21 mg/LJun–Sep
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendedweekly average≤ 190 lb/dJun–Sep
Solids, total suspendedweekly average≤ 413 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, settleabledaily maximum≤ .3 mL/Lall year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]daily maximumreport only (lb/d)all year
Nitrogen, total [as N]rolling average≤ 31 lb/dApr–Oct
Nitrogen, ammonia total [as N]weekly average≤ 7 mg/LJun–Sep
Nitrogen, ammonia total [as N]monthly average≤ 16 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 65 lb/dJun–Sep
Nitrogen, ammonia total [as N]monthly average≤ 147 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (lb/d)all year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (lb/d)all year
Nitrite + Nitrate total [as N]daily maximumreport only (lb/d)all year
Phosphorus, total [as P]monthly average≤ .75 mg/LMay–Sep
Phosphorus, total [as P]daily maximumreport only (mg/L)May–Sep
Phosphorus, total [as P]monthly average≤ 4.4 lb/dMay–Sep
Chromium, total [as Cr]monthly average≤ 1.5 mg/Lall year
Chromium, total [as Cr]daily maximum≤ 2 mg/Lall year
Chromium, total [as Cr]monthly average≤ 9.1 lb/dall year
Chromium, total [as Cr]daily maximum≤ 13 lb/dall year
Zinc, total [as Zn]monthly averagereport only (ug/L)all year
Zinc, total [as Zn]daily maximumreport only (ug/L)all year
Zinc, total [as Zn]monthly average≤ 2.9 lb/dall year
Zinc, total [as Zn]daily maximum≤ 2.5 lb/dall year
E. coli, thermotol, MF, MTECmonthly geometric mean≤ 100 #/100mLall year
E. coli, thermotol, MF, MTECdaily maximum≤ 236 #/100mLall year
Flow, in conduit or thru treatment plantmonthly average≤ 1.1 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .1 mg/Lall year
Chlorine, total residualdaily maximum≤ .3 mg/Lall year
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Mercury, total [as Hg]monthly average≤ 5.2 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 7.7 ng/Lall year
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiavaluereport only (%)all year
Noel Statre 10Day Chronic Salvel. Salmoniddaily minimum≥ 5.6 %all year
NOAEL Static 48Hr Acute Ceriodaphnia dubiavaluereport only (%)all year
NOAEL Static 48Hr Acute Salvel. Salmonidvaluereport only (%)all year

How strict are these limits?

Cited limits by parameter: Maine'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/ME0101397 · MCP: https://passage-data.com/mcp