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NPDES permit MD0066079 · Minor NON-POTW · effective, expires 2030-03-31 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 20 forms filed late

Last period with anything received: 2026-06-30.

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 (48)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 50 mg/L all year
001Oil & GreaseMO AVG <= 12 mg/L all year
001Oil & GreaseDAILY MX <= 16 mg/L all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]MY report only all year
001Nitrogen, total [as N]ANNL TOT <= 3641 lb/yr all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, organic total [as N]DAILY MX report only all year
001Ammonia nitrogen, total, [as N] 30 dayMO AVG report only all year
001Ammonia nitrogen, total, [as N] 30 dayDAILY MX report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MY report only all year
001Phosphorus, total [as P]ANNL TOT <= 166 lb/yr all year
001Hardness, total [as CaCO3]MO AVG report only all year
001Hardness, total [as CaCO3]DAILY MX report only all year
001Chromium, total [as Cr]MO AVG <= .1 mg/L all year
001Chromium, total [as Cr]DAILY MX <= .1 mg/L all year
001Copper, total [as Cu]MO AVG <= .024 mg/L all year
001Copper, total [as Cu]MO AVG <= 1 mg/L all year
001Copper, total [as Cu]DAILY MX <= .039 mg/L all year
001Copper, total [as Cu]DAILY MX <= 1 mg/L all year
001Iron, total [as Fe]MO AVG <= 1 mg/L all year
001Iron, total [as Fe]DAILY MX <= 1 mg/L all year
001Nickel, total [as Ni]MO AVG <= .135 mg/L all year
001Nickel, total [as Ni]DAILY MX <= 1.22 mg/L all year
001Silver, total [as Ag]MO AVG <= .022 mg/L all year
001Silver, total [as Ag]DAILY MX <= .022 mg/L all year
001Zinc, total [as Zn]MO AVG <= .307 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .307 mg/L all year
001Temp. diff. between up/down stream deg. FMO AVG report only Jun, Jul, Aug, Sep
001Temp. diff. between up/down stream deg. FDAILY MX <= 0 deg F Jun, Jul, Aug, Sep
001Oxidants, total residualMO AVG <= .011 mg/L all year
001Oxidants, total residualDAILY MX <= .019 mg/L all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001FlowMO AVG report only all year
001FlowDAILY MX report only all year
001FlowDAILY MX <= 30 gal/d all year
001FlowMO AVG report only all year
001SulfateMO AVG report only all year
001SulfateDAILY MX 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