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North Harford JR/SR/H.S. WWTP

Elementary And Secondary Schools, Pylesville, Maryland. NPDES permit MD0023281, in force until Dec 31, 2027. Last 12 months: over a limit 5 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (18 values), outfall 002 form A quarterly (3 values), outfall 101 form A monthly (2 values), outfall MW1 form A yearly, outfall MW2 form A yearly
Renewal application due
Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 12 of 30 reports late

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

Period endingParameterReportedLimitOver by
May 2026Nitrogen, ammonia total [as N], maximum monthly average31.5 mg/L≤ 5.4 mg/L483%
June 2026Nitrogen, ammonia total [as N], maximum monthly average39.3 mg/L≤ 5.4 mg/L628%
July 2026pH, maximum8.95 SU≤ 8.5 SU—
July 2026pH, minimum5.51 SU≥ 6.5 SU—
August 2026pH, minimum5.91 SU≥ 6.5 SU—

Limits in force (29)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year001
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. Cmonthly average≤ 5 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 7.5 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 5 lb/dall year001
Solids, total suspendedweekly average≤ 7.5 lb/dall year001
Nitrogen, ammonia total [as N]maximum monthly average≤ 5.4 mg/LMay–Sep001
Nitrogen, ammonia total [as N]maximum monthly average≤ 3.9 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ 10.3 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]maximum monthly average≤ .9 lb/dMay–Sep001
Nitrogen, ammonia total [as N]maximum monthly average≤ .65 lb/dJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ 1.7 lb/dJan, Feb, Mar, Apr, Oct, Nov, Dec001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Chlorine, total residualmaximum< .029 mg/Lall year001
E. colimonthly geometric mean≤ 126 MPN/100mLall year001
BOD, 5-day, percent removalmonthly averagereport only (%)all year001
Solids, suspended percent removalmonthly averagereport only (%)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year002
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year002
Phosphate, total [as PO4]monthly averagereport only (mg/L)all year002
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year101
Solids, total suspendedmonthly averagereport only (mg/L)all year101
Nitrogen, total [as N]maximum≤ 10 mg/Lall yearMW1
Nitrogen, total [as N]maximumreport only (mg/L)all yearMW2

How strict are these limits?

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

Same industry: the 20 Educational Services permits in Maryland.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MD0023281 · MCP: https://passage-data.com/mcp