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Mayor and Council of Town of Hurlock

Sewage treatment plant, major discharger, Hurlock, Maryland. NPDES permit MD0022730 expired Apr 30, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form A monthly (32 values), form B yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 2 required values missing, 1 of 13 reports late

Limits in force (44)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 15 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 23 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 206 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 413 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 317 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 619 lb/dJan, Feb, Mar, Apr, Nov, Dec
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8 SUall year
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 413 lb/dall year
Solids, total suspendedmaximum weekly average≤ 619 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]cumulative total≤ 20101 lb/yrall year
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year
Nitrogen, total [as N]annual totalreport only (lb/yr)all year
Nitrogen, total [as N]annual totalreport only (lb/yr)all year
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum monthly average≤ 5.9 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum monthly average≤ 2 mg/LMay–Oct
Nitrogen, ammonia total [as N]maximum monthly average≤ 81 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum monthly average≤ 28 lb/dMay–Oct
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum monthly average≤ .72 mg/Lall year
Phosphorus, total [as P]maximum weekly average≤ 1.1 mg/Lall year
Phosphorus, total [as P]maximum monthly average≤ 9.9 lb/dall year
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year
Phosphorus, total [as P]maximum weekly average≤ 15 lb/dall year
Phosphorus, total [as P]annual maximum≤ 1508 lb/yrall year
Phosphorus, total [as P]annual totalreport only (lb/yr)all year
Phosphorus, total [as P]annual totalreport only (lb/yr)all year
Zinc, total recoverablemonthly averagereport only (mg/L)all year
Copper, total recoverablemonthly averagereport only (mg/L)all year
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmaximum≤ .01 mg/Lall year
E. colimaximum monthly geometric mean≤ 126 MPN/100mLall year
Flow, totalmonthly totalreport only (Mgal/mo)all year
Flow, totalannual totalreport only (Mgal/yr)all year
Flow, totalannual totalreport only (Mgal/yr)all year

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/MD0022730 · MCP: https://passage-data.com/mcp