Passage Data · Check a report · Use it from your AI

Marianapolis Preparatory SCH

Elementary And Secondary Schools, Thompson, Connecticut. NPDES permit CT0020893 expired Jun 1, 1998; its limits still apply. Last 12 months: no values over a limit, 132 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 31 days after each period: form 1 monthly (16 values)
Last report on file
None
Oct 2024 – Sep 2025
0 values over a limit, 153 required values missing, 0 of 12 reports late

Limits in force (16)

ParameterStatisticLimitMonths
Turbidityinstantaneous maximumreport only (NTU)all year
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 30 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, settleablemonthly averagereport only (mL/L)all year
Solids, settleableinstantaneous maximumreport only (mL/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year
Chlorine, total residualinstantaneous minimum≥ .2 mg/LMay–Sep
Chlorine, total residualinstantaneous maximum≤ 1.5 mg/LMay–Sep
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Sep
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Sep

How strict are these limits?

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

Same industry: the 3 Educational Services permits in Connecticut.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CT0020893 · MCP: https://passage-data.com/mcp