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Lowell Regional WW Utility

Sewage treatment plant, major discharger, Lowell, Massachusetts. NPDES permit MA0100633 expired Nov 30, 2024; its limits still apply. Last 12 months: over a limit 6 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (36 values), form B monthly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
5 values over a limit, 4 required values missing, 0 of 23 reports late

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

Period endingParameterReportedLimitOver by
October 2025E. coli, daily maximum830 MPN/100mL≤ 409 CFU/100mL103%
October 2025Phosphorus, total [as P], monthly average1.38 mg/L≤ 1.08 mg/L28%
May 2026Phosphorus, total [as P], monthly average1.14 mg/L≤ 1.08 mg/L6%
June 2026Phosphorus, total [as P], monthly average1.37 mg/L≤ 1.08 mg/L27%
August 2026Phosphorus, total [as P], monthly average1.49 mg/L≤ 1.08 mg/L38%
September 2026Phosphorus, total [as P], monthly average1.12 mg/L≤ 1.08 mg/L4%

Limits in force (67)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Apr, Jul, Oct
Oxygen, dissolved [DO]monthly averagereport only (mg/L)Apr–Oct
pHminimum≥ 6 SUall year
pHmaximum≤ 8.3 SUall year
pHmaximumreport only (SU)Jan, Apr, Jul, Oct
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 8006 lb/dall year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Solids, total suspendedweekly average≤ 12010 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly average minimum≥ 85 %all year
Nitrogen, total [as N]monthly averagereport only (mg/L)Apr–Oct
Nitrogen, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec
Nitrogen, total [as N]daily maximumreport only (mg/L)Apr–Oct
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Apr–Oct
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Apr–Oct
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Apr–Oct
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Apr–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec
Phosphorus, total [as P]monthly average≤ 1.08 mg/LApr–Oct
Phosphorus, total [as P]daily maximumreport only (mg/L)Apr–Oct
Phosphorus, total [as P]daily maximumreport only (mg/L)Apr–Oct
Phosphorus, total [as P]daily maximumreport only (mg/L)Apr–Oct
Phosphorus, total [as P]monthly average≤ 1.08 lb/dApr–Oct
Carbon, tot organic [TOC]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Carbon, tot organic [TOC]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Carbon, dissolved organic [as C]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Carbon, dissolved organic [as C]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Cadmium, total [as Cd]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Cadmium, total [as Cd]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Copper, total [as Cu]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Copper, total [as Cu]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Lead, total [as Pb]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Lead, total [as Pb]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Nickel, total [as Ni]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Nickel, total [as Ni]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Zinc, total [as Zn]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Zinc, total [as Zn]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Aluminum, total [as Al]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Aluminum, total [as Al]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Flow, in conduit or thru treatment plantrolling average≤ 32 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ 196 ug/Lall year
Chlorine, total residualdaily maximum≤ 338 ug/Lall year
Chlorine, total residualmonthly averagereport only (ug/L)all year
Chlorine, total residualdaily maximumreport only (ug/L)all year
E. colimonthly geometric mean≤ 126 CFU/100mLall year
E. colidaily maximum≤ 409 CFU/100mLall year
Nitrogen, Ammonia Totaldaily maximumreport only (mg/L)Jan, Apr, Jul, Oct
Nitrogen, Ammonia Totaldaily maximumreport only (mg/L)Jan, Apr, Jul, Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6672 lb/dall year
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 10675 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly average minimum≥ 85 %all year
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimum≥ 100 %Jan, Apr, Jul, Oct
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)Jan, Apr, Jul, Oct

How strict are these limits?

Cited limits by parameter: Massachusetts'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/MA0100633 · MCP: https://passage-data.com/mcp