Town of Poolesville

NPDES permit MD0023001 · Minor POTW · effective, expires 2027-11-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

1values over a limit
0required values missing, on 0 form(s)
0of 56 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, 5-day, 20 deg. C (1).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MD permits in EPA's filings — check your permit).

Limits in force (77)

OutfallParameterStatisticLimitMonths
001ConductivityMO AVG report only all year
001ConductivityQRTR AVG report only all year
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L all year
001Oxygen, dissolved [DO]DLYAVMIN >= 6 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 10 mg/L all year
001BOD, 5-day, 20 deg. CMX WK AV <= 15 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 63 lb/d all year
001BOD, 5-day, 20 deg. CMX WK AV <= 94 lb/d all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Alkalinity, total [as CaCO3]MO AVG report only all year
001Solids, total suspendedMX MO AV <= 10 mg/L all year
001Solids, total suspendedMX WK AV <= 15 mg/L all year
001Solids, total suspendedMX MO AV <= 63 lb/d all year
001Solids, total suspendedANNL MAX <= 68525 lb/yr all year
001Solids, total suspendedMX WK AV <= 94 lb/d all year
001Solids, total suspendedTOTAL report only all year
001Solids, total suspendedTOTAL report only all year
001Solids, total suspendedMO TOTAL report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrogen, total [as N]ANNL MAX <= 9137 lb/yr all year
001Nitrogen, total [as N]TOTAL report only all year
001Nitrogen, total [as N]TOTAL report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MX MO AV <= .7 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV <= 1.7 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX DA AV <= 3.6 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX DA AV <= 4.5 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 4.4 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV <= 10.6 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX DA AV <= 22.5 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX DA AV <= 28.2 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, Kjeldahl, total [as N]MX MO AV <= 3.3 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, Kjeldahl, total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, Kjeldahl, total [as N]MX WK AV <= 5 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, Kjeldahl, total [as N]WKLY AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, Kjeldahl, total [as N]MX MO AV <= 20.6 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, Kjeldahl, total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, Kjeldahl, total [as N]MX WK AV <= 31 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, Kjeldahl, total [as N]WKLY AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]ANNL MAX <= 685 lb/yr all year
001Phosphorus, total [as P]MO TOTAL report only all year
001Phosphorus, total [as P]TOTAL report only all year
001Phosphorus, total [as P]TOTAL report only all year
001Hardness, total [as CaCO3]MO AVG report only all year
001Sulfate, dissolved [as SO4]MO AVG report only all year
001BenzofluorantheneMO AVG report only all year
001Phosphate, ortho [as P]MO AVG report only all year
001N-Nitrosodimethylamine [NDMA]MINIMUM report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMAXIMUM < .1 mg/L all year
001E. coliGX <= 126 MPN/100mL all year
001BOD, 5-day, percent removalMINIMUM >= 85 % all year
001Solids, suspended percent removalMINIMUM >= 85 % all year
001Flow, totalMO TOTAL report only all year
001Flow, totalTOTAL report only all year
001Flow, totalTOTAL report only all year
001Chloride, dissolved [as Cl]MO AVG report only all year
101BOD, 5-day, 20 deg. CMO AVG report only all year
101Solids, total suspendedMO AVG report only all year
201FlowMO AVG report only all year
201FlowMO AVG report only all year
201FlowDAILY MX report only all year
201FlowDAILY MX report only all year
301FlowMO AVG report only all year
301FlowDAILY MX report only all year
TRADSolids, total suspendedCUM TOTL report only all year
TRADSolids, total suspendedCUM TOTL report only all year
TRADNitrogen, total [as N]CUM TOTL report only all year
TRADNitrogen, total [as N]CUM TOTL report only all year
TRADPhosphorus, total [as P]CUM TOTL report only all year
TRADPhosphorus, total [as P]CUM TOTL report only all year
TRADFlowYA report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states