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Groton School

Elementary And Secondary Schools, Groton, Massachusetts. NPDES permit MA0033324 expired Sep 30, 2019; its limits still apply. Last 12 months: no values over a limit, 1 of 13 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (22 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
7 values over a limit, 2 required values missing, 3 of 13 reports late

Limits in force (31)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 18 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
BOD, 5-day, 20 deg. Cweekly average≤ 26 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 8.3 SUall year
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≤ 18 lb/dall year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Solids, total suspendedweekly average≤ 26 lb/dall year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jun
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ .6 lb/dall year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Jun
Nickel, total recoverabledaily maximumreport only (mg/L)Jun
Zinc, total recoverabledaily maximumreport only (mg/L)Jun
Aluminum, total recoverabledaily maximumreport only (mg/L)Jun
Cadmium, total recoverabledaily maximumreport only (mg/L)Jun
Lead, total recoverabledaily maximumreport only (mg/L)Jun
Copper, total recoverabledaily maximumreport only (mg/L)Jun
E. coli, thermotol, MF, MTECmonthly geometric mean≤ 126 CFU/100mLall year
E. coli, thermotol, MF, MTECdaily maximum≤ 409 CFU/100mLall year
Flow, in conduit or thru treatment plantrolling average≤ .07 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
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimum≥ 50 %Jun

How strict are these limits?

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

Same industry: the 4 Educational Services permits in Massachusetts.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MA0033324 · MCP: https://passage-data.com/mcp