GRACE DAVISON-CURTIS BAY

NPDES permit MD0000311 · Major NON-POTW · expired, expires 2025-07-31 · 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.

This permit expired on 2025-07-31 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
0required values missing, on 0 form(s)
0of 32 forms filed late

Last period with anything received: 2026-07-31.

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 (58)

OutfallParameterStatisticLimitMonths
001TurbidityMX MO AV <= 45 NTU all year
001TurbidityMX DA AV <= 90 NTU all year
001BOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMY report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedANNL MAX <= 569246 lb/yr all year
001Solids, total suspendedANNL MAX <= 683096 lb/yr 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]MO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]CUM TOTL <= 155370 lb/yr May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]CUM TOTL <= 310737 lb/yr all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]DAILY MX <= 3600 lb/mo all year
001Nitrogen, ammonia total [as N]MX MO AV <= 1700 lb/mo all year
001Nitrogen, ammonia total [as N]DAILY MX <= 2140 lb/mo Apr, May
001Nitrogen, ammonia total [as N]DAILY MX <= 1420 lb/mo Jun, Jul, Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 2600 lb/mo Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX MO AV <= 1500 lb/mo Apr, May
001Nitrogen, ammonia total [as N]MX MO AV <= 970 lb/mo Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MX MO AV <= 1700 lb/mo Sep, Oct, Nov
001Nitrogen, nitrite total [as N]MO AVG report only all year
001Nitrogen, nitrate total [as N]MO AVG 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]MO AVG report only all year
001Phosphorus, total [as P]CUM TOTL <= 1236 lb/yr May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]CUM TOTL report only all year
001Phosphorus, total [as P]CUM TOTL <= 2475 lb/yr all year
001Copper, total [as Cu]MX MO AV <= 122 mg/L all year
001Copper, total [as Cu]MX DA AV <= 122 mg/L all year
001Phosphate, ortho [as P]DAILY MX report only all year
001Phosphate, ortho [as P]MO AVG report only all year
001Phosphate, ortho [as P]DAILY MX report only all year
001Phosphate, ortho [as P]MY 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
001Flow, totalTOTAL report only all year
001pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
001pH range excursions, monthly total accumMO TOTAL <= 446 min all year
002Toxicity characteristic leaching procedureQRTR AVG report only Mar, Jun, Sep, Dec
002Toxicity characteristic leaching procedureQRTR AVG report only Mar, Jun, Sep, Dec
MW08Nitrogen, nitrate total [as N]VALUE report only all year
MW08Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW16Nitrogen, nitrate total [as N]VALUE report only all year
MW16Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW17Nitrogen, nitrate total [as N]VALUE report only all year
MW17Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW18Nitrogen, nitrate total [as N]VALUE report only all year
MW18Nitrogen, Kjeldahl, total [as N]VALUE 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