Baltimore City DPW

NPDES permit MD0021601 · Major POTW · administratively continued, expires 2022-09-30 · 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.

This permit expired on 2022-09-30 and is administratively continued: 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

6values over a limit
0required values missing, on 0 form(s)
1of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Phosphorus, total [as P] (2), Nitrogen, total [as N] (2), BOD, 5-day, 20 deg. C (2).

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 (49)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L all year
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L Feb, Mar, Apr, May
001Oxygen, dissolved [DO]MN WK AV >= 6 mg/L Feb, Mar, Apr, May
001BOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMX WK AV <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 18000 lb/d all year
001BOD, 5-day, 20 deg. CMX WK AV <= 27000 lb/d all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMX MO AV <= 30 mg/L all year
001Solids, total suspendedMX WK AV <= 45 mg/L all year
001Solids, total suspendedMX MO AV <= 18000 lb/d all year
001Solids, total suspendedMO TOTAL report only all year
001Solids, total suspendedMX WK AV <= 27000 lb/d all year
001Solids, total suspendedANNL MAX <= 6669776 lb/yr 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]CUM TOTL <= 889300 lb/yr all year
001Nitrogen, total [as N]TC <= 333330 lb/yr May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 6.3 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 3836 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MX MO AV <= 2 mg/L all year
001Phosphorus, total [as P]MX WK AV <= 3 mg/L all year
001Phosphorus, total [as P]MY report only all year
001Phosphorus, total [as P]MX MO AV <= 1220 lb/d all year
001Phosphorus, total [as P]MX WK AV <= 1830 lb/d all year
001Phosphorus, total [as P]CUM TOTL <= 66700 lb/yr all year
001Phosphorus, total [as P]TC <= 33330 lb/yr May, Jun, Jul, Aug, Sep, Oct
001Cyanide, free [amenable to chlorination]MO AVG report only all year
001Cyanide, free [amenable to chlorination]MY report only all year
001Copper, total [as Cu]MO AVG report only all year
001Copper, total [as Cu]MY report only all year
001Phosphate, ortho [as P]MO AVG report only all year
001Phosphate, ortho [as P]MO AVG report only all year
001Heptachlor epoxideQRTR AVG report only Mar, Jun, Sep, Dec
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
001EnterococciMO GEOMN <= 35 MPN/100mL all year
001Polychlorinated biphenyls [PCB] pg/LQRTR AVG report only Mar, Jun, Sep, Dec
001Polychlorinated biphenyls [PCB] pg/LQRTR AVG report only Mar, Jun, Sep, Dec
001Flow, totalTOTAL report only all year
001Flow, totalANNL TOT report only Dec

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