MARYLAND PORT ADMINISTRATION

NPDES permit MDDRG3890 · Minor NON-POTW · effective, expires 2029-11-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
0required values missing, on 0 form(s)
0of 10 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (60)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6 SU all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMX MO AV <= 75 mg/L all year
001Solids, total suspendedMX MO AV <= 75 mg/L all year
001Solids, total suspendedDAILY MX <= 150 mg/L all year
001Solids, total suspendedDAILY MX <= 150 mg/L 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]MO AVG report only 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]DAILY MX report only all year
001Nitrogen, total [as N]ANNL MAX report only all year
001Nitrogen, total [as N]ANNL MAX report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, organic total [as N]DAILY MX report only all year
001Nitrogen, organic total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]DAILY MX <= .3 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= .3 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 3.7 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 3.7 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrite + Nitrate total [as N]MO AVG 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
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]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX 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]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]ANNL MAX report only all year
001Phosphorus, total [as P]ANNL MAX report only all year
001Phosphorus, total [as P]ANNL MAX report only all year
001Phosphorus, total [as P]ANNL MAX report only all year
001Copper, total [as Cu]MX MO AV <= 3.1 ug/L all year
001Copper, total [as Cu]MX MO AV <= 3.1 ug/L all year
001Copper, total [as Cu]DAILY MX <= 4.8 ug/L all year
001Copper, total [as Cu]DAILY MX <= 4.8 ug/L all year
001Lead, total [as Pb]MX MO AV <= 8.1 ug/L all year
001Lead, total [as Pb]MX MO AV <= 8.1 ug/L all year
001Lead, total [as Pb]DAILY MX <= 210 ug/L all year
001Lead, total [as Pb]DAILY MX <= 210 ug/L all year
001Zinc, total [as Zn]MX MO AV <= 81 ug/L all year
001Zinc, total [as Zn]MX MO AV <= 81 ug/L all year
001Zinc, total [as Zn]DAILY MX <= 90 ug/L all year
001Zinc, total [as Zn]DAILY MX <= 90 ug/L all year
001PCB, total, scan effluentDAILY MX report only all year
001PCB, total, scan effluentDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG 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, in conduit or thru treatment plantDAILY MX report only all year
001ChlordaneDAILY MX report only all year
001ChlordaneDAILY 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