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Greater Lawrence Sanitary District

Sewage treatment plant, major discharger, No Andover, Massachusetts. NPDES permit MA0100447 expired Nov 30, 2024; its limits still apply. Last 12 months: no values over a limit, 1 of 83 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (38 values), outfall 001 form PA monthly (1 value), outfall 002 form A monthly (3 values), outfall 003 form A monthly (3 values), outfall 004 form A monthly (3 values), outfall 005 form A monthly (3 values), and 1 more form
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 83 reports late

Limits in force (82)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Apr, Jul, Oct001
Oxygen, dissolved [DO]minimum≥ 5 mg/LApr–Oct001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 13000 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year001
BOD, 5-day, 20 deg. Cweekly average≤ 19516 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.3 SUall year001
pHmaximumreport only (SU)Jan, Apr, Jul, Oct001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendeddaily maximum≤ 50 mg/Lall year001
Solids, total suspendedmonthly average≤ 13010 lb/dall year001
Solids, total suspendeddaily maximumreport only (lb/d)all year001
Solids, total suspendedweekly average≤ 19516 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec001
Nitrogen, total [as N]monthly averagereport only (lb/d)Apr–Oct001
Nitrogen, total [as N]daily maximumreport only (lb/d)Apr–Oct001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Apr–Oct001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Apr–Oct001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Apr–Oct001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Apr–Oct001
Phosphorus, total [as P]monthly averagereport only (mg/L)Apr–Oct001
Phosphorus, total [as P]daily maximumreport only (mg/L)Jan, Feb, Mar, Nov, Dec001
Phosphorus, total [as P]daily maximumreport only (mg/L)Apr–Oct001
Phosphorus, total [as P]monthly average≤ 240 lb/dApr–Oct001
Phosphorus, total [as P]daily maximumreport only (lb/d)Apr–Oct001
Phosphorus, total [as P]daily maximumreport only (mg/L)Apr–Oct001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Carbon, dissolved organic [as C]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Carbon, dissolved organic [as C]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Cadmium, total [as Cd]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Cadmium, total [as Cd]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Copper, total [as Cu]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Copper, total [as Cu]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Lead, total [as Pb]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Lead, total [as Pb]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Nickel, total [as Ni]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Nickel, total [as Ni]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Zinc, total [as Zn]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Zinc, total [as Zn]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Aluminum, total [as Al]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Aluminum, total [as Al]daily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Flow, in conduit or thru treatment plantrolling average≤ 52 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Chlorine, total residualmonthly average minimumreport only (ug/L)all year001
Chlorine, total residualdaily maximumreport only (ug/L)all year001
Chlorine, total residualmonthly average≤ 150 ug/Lall year001
Chlorine, total residualdaily maximum≤ 260 ug/Lall year001
E. coli, colony forming units [CFU]monthly geometric mean≤ 126 CFU/100mLall year001
E. coli, colony forming units [CFU]daily maximum≤ 409 CFU/100mLall year001
Nitrogen, Ammonia Totaldaily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Nitrogen, Ammonia Totaldaily maximumreport only (mg/L)Jan, Apr, Jul, Oct001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimum≥ 100 %Jan, Apr, Jul, Oct001
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)Jan, Apr, Jul, Oct001
Number of Eventsdaily maximumreport only (#)all year002
Duration of dischargedaily maximumreport only (hr)all year002
Flow, totaldaily maximumreport only (gal/d)all year002
Number of Eventsdaily maximumreport only (#)all year003
Duration of dischargedaily maximumreport only (hr)all year003
Flow, totaldaily maximumreport only (gal/d)all year003
Number of Eventsdaily maximumreport only (#)all year004
Duration of dischargedaily maximumreport only (hr)all year004
Flow, totaldaily maximumreport only (gal/d)all year004
Number of Eventsdaily maximumreport only (#)all year005
Duration of dischargedaily maximumreport only (hr)all year005
Flow, totaldaily maximumreport only (gal/d)all year005
Number of Eventsdaily maximumreport only (#)all year006
Duration of dischargedaily maximumreport only (hr)all year006
Flow, totaldaily maximumreport only (gal/d)all year006

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/MA0100447 · MCP: https://passage-data.com/mcp