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Maryland Environmental Service

Sewage treatment plant, Sabillasville, Maryland. NPDES permit MD0023922, in force until Jan 31, 2031. Last 12 months: over a limit 5 times (last August 2026), 42 required values missing, 7 of 19 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (39 values), outfall TRAD form E monthly (7 values), outfall 001 form B yearly, outfall 101 form A yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 13 reports late

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

Period endingParameterReportedLimitOver by
July 2026Temperature, water deg. fahrenheit, maximum68.2 deg F≤ 68 deg F0%
July 2026Temperature, water deg. fahrenheit, maximum68.5 deg F≤ 68 deg F1%
August 2026Temperature, water deg. fahrenheit, maximum69.6 deg F≤ 68 deg F2%
August 2026Temperature, water deg. fahrenheit, maximum70.3 deg F≤ 68 deg F3%
August 2026Temperature, water deg. fahrenheit, maximum70.5 deg F≤ 68 deg F4%

Limits in force (64)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitmaximum≤ 68 deg Fall year001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitmaximum≤ 68 deg Fall year001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitmaximum≤ 68 deg Fall year001
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 20 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 8.3 lb/dMay–Oct001
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 13 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 13 lb/dMay–Oct001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 19 lb/dJan, Feb, Mar, Apr, Nov, Dec001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year001
Solids, total suspendedannual maximum≤ 4560 lb/yrall year001
Solids, total suspendedmaximum monthly average≤ 13 lb/dall year001
Solids, total suspendedmonthly totalreport only (lb/mo)all year001
Solids, total suspendedmaximum weekly average≤ 19 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]annual maximum≤ 609 lb/yrall year001
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year001
Nitrogen, total [as N]annual totalreport only (lb/yr)all year001
Nitrogen, total [as N]annual totalreport only (lb/yr)all year001
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]maximum monthly average≤ .9 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ 2.6 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ 3.8 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 7.8 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum daily average≤ 1.6 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum daily average≤ 3.3 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximum monthly average≤ .4 lb/dMay–Oct001
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.1 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]annual maximum≤ 46 lb/yrall year001
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year001
Phosphorus, total [as P]annual totalreport only (lb/yr)all year001
Phosphorus, total [as P]annual totalreport only (lb/yr)all year001
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
E. colimaximum monthly geometric mean≤ 126 MPN/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Flow, totalmonthly totalreport only (MGD)all year001
Flow, totalannual totalreport only (Mgal/yr)all year001
Flow, totalannual totalreport only (Mgal/yr)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year101
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year101
Solids, total suspendedmonthly averagereport only (mg/L)all year101
Solids, total suspendedmonthly averagereport only (mg/L)all year101
Solids, total suspendedmonthly totalreport only (lb/yr)all yearTRAD
Solids, total suspendedmonthly totalreport only (lb/yr)all yearTRAD
Nitrogen, total [as N]monthly totalreport only (lb/yr)all yearTRAD
Nitrogen, total [as N]monthly totalreport only (lb/yr)all yearTRAD
Phosphorus, total [as P]monthly totalreport only (lb/yr)all yearTRAD
Phosphorus, total [as P]monthly totalreport only (lb/yr)all yearTRAD
Flowyear-to-date totalreport only (Mgal/yr)all yearTRAD

How strict are these limits?

Cited limits by parameter: Maryland'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/MD0023922 · MCP: https://passage-data.com/mcp