NPDES permit MD0020273 · Major POTW · effective, expires 2029-06-30 · EPA's file as of 2026-09-19
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Last period with anything received: 2026-07-31.
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).
| Outfall | Parameter | Statistic | Limit | Months |
|---|---|---|---|---|
| 001 | Oxygen, dissolved [DO] | MN WK AV | >= 6 mg/L | Feb, Mar, Apr, May |
| 001 | Oxygen, dissolved [DO] | INST MIN | >= 5 mg/L | all year |
| 001 | BOD, 5-day, 20 deg. C | MX MO AV | <= 11 mg/L | May, Jun, Jul, Aug, Sep, Oct |
| 001 | BOD, 5-day, 20 deg. C | MX MO AV | <= 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| 001 | BOD, 5-day, 20 deg. C | MX WK AV | <= 17 mg/L | May, Jun, Jul, Aug, Sep, Oct |
| 001 | BOD, 5-day, 20 deg. C | MX WK AV | <= 45 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| 001 | BOD, 5-day, 20 deg. C | MX MO AV | <= 370 lb/d | May, Jun, Jul, Aug, Sep, Oct |
| 001 | BOD, 5-day, 20 deg. C | MX MO AV | <= 1000 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| 001 | BOD, 5-day, 20 deg. C | MX WK AV | <= 570 lb/d | May, Jun, Jul, Aug, Sep, Oct |
| 001 | BOD, 5-day, 20 deg. C | MX WK AV | <= 1500 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| 001 | pH | MINIMUM | >= 6.5 SU | all year |
| 001 | pH | MAXIMUM | <= 8.5 SU | all year |
| 001 | Solids, total suspended | MX MO AV | <= 30 mg/L | all year |
| 001 | Solids, total suspended | MX WK AV | <= 45 mg/L | all year |
| 001 | Solids, total suspended | MX MO AV | <= 1000 lb/d | all year |
| 001 | Solids, total suspended | MX WK AV | <= 1500 lb/d | all year |
| 001 | Solids, total suspended | CUM TOTL | <= 365467 lb/yr | all year |
| 001 | Solids, total suspended | MY | report only | all year |
| 001 | Nitrogen, total [as N] | MO AVG | report only | all year |
| 001 | Nitrogen, total [as N] | CUM TOTL | <= 48729 lb/yr | all year |
| 001 | Nitrogen, total [as N] | MO TOTAL | report only | all year |
| 001 | Nitrogen, total [as N] | ANNL TOT | report only | Dec |
| 001 | Nitrogen, organic total [as N] | MO AVG | report only | all year |
| 001 | Nitrogen, ammonia total [as N] | MX MO AV | <= .4 mg/L | May, Jun, Jul, Aug, Sep, Oct |
| 001 | Nitrogen, ammonia total [as N] | MX MO AV | <= 1 mL/L | Jan, Feb, Mar, Apr, Nov, Dec |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 1.9 mg/L | May, Jun, Jul, Aug, Sep, Oct |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 5.6 mL/L | Jan, Feb, Mar, Apr, Nov, Dec |
| 001 | Nitrogen, ammonia total [as N] | MX MO AV | <= 13 lb/d | May, Jun, Jul, Aug, Sep, Oct |
| 001 | Nitrogen, ammonia total [as N] | MX MO AV | <= 33 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 63 lb/d | May, Jun, Jul, Aug, Sep, Oct |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 187 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| 001 | Nitrogen, Kjeldahl, total [as N] | MO AVG | report only | all year |
| 001 | Nitrite + Nitrate total [as N] | MO AVG | report only | all year |
| 001 | Phosphorus, total [as P] | MO AVG | report only | all year |
| 001 | Phosphorus, total [as P] | CUM TOTL | <= 3655 lb/yr | all year |
| 001 | Phosphorus, total [as P] | ANNL TOT | report only | Dec |
| 001 | Phosphorus, total [as P] | MO TOTAL | report only | all year |
| 001 | Carbon, dissolved organic [as C] | MO AVG | report only | all year |
| 001 | Cyanide, total [as CN] | MINIMUM | report only | all year |
| 001 | Hardness, total [as CaCO3] | MO AVG | report only | all year |
| 001 | Phosphate, ortho [as P] | MO AVG | report only | all year |
| 001 | 4,4'-DDT | MINIMUM | report only | all year |
| 001 | Toxaphene | MINIMUM | report only | all year |
| 001 | Flow, in conduit or thru treatment plant | MO AVG | report only | all year |
| 001 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 001 | Coliform, fecal general | MO MED | <= 14 MPN/100mL | all year |
| 001 | BOD, 5-day, percent removal | MO AV MN | >= 85 % | all year |
| 001 | Solids, suspended percent removal | MO AV MN | >= 85 % | all year |
| 002 | Flow, discharge | MO AV MN | report only | all year |
| 002 | Flow, discharge | DAILY MX | report only | all year |
| 101 | Flow, in conduit or thru treatment plant | MO AVG | report only | all year |
| 101 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 101 | Flow, total | MO TOTAL | report only | all year |
| 102 | BOD, 5-day, 20 deg. C | MO AVG | report only | all year |
| 102 | Solids, total suspended | MO AVG | report only | all year |
| TRAD | Solids, total suspended | CUM TOTL | report only | all year |
| TRAD | Solids, total suspended | CUM TOTL | report only | all year |
| TRAD | Nitrogen, total [as N] | CUM TOTL | report only | all year |
| TRAD | Nitrogen, total [as N] | CUM TOTL | report only | all year |
| TRAD | Phosphorus, total [as P] | CUM TOTL | report only | all year |
| TRAD | Phosphorus, total [as P] | CUM TOTL | report only | all year |
| TRAD | Flow | YA | 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