NATIONAL INSTITUTES OF HEALTH

NPDES permit MD0020931 · Minor FEDERAL · effective, expires 2029-08-31 · 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
35required values missing, on 1 form(s)
8of 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 (43)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 10 mg/L Apr, May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMX MO AV <= 15 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMX WK AV <= 15 mg/L Apr, May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMX WK AV <= 22.5 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMX MO AV <= 8.3 lb/d Apr, May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMX MO AV <= 13 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMX WK AV <= 13 lb/d Apr, May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMX WK AV <= 18.8 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMX MO AV <= 10 mg/L Apr, May, Jun, Jul, Aug, Sep
001Solids, total suspendedMX WK AV <= 15 mg/L Apr, May, Jun, Jul, Aug, Sep
001Solids, total suspendedMX MO AV <= 8.3 lb/d Apr, May, Jun, Jul, Aug, Sep
001Solids, total suspendedMX WK AV <= 13 lb/d Apr, May, Jun, Jul, Aug, Sep
001Solids, total suspendedCUM TOTL report only all year
001Solids, total suspendedMO TOTAL report only Jan, Feb, Mar, Oct, Nov, Dec
001Solids, total suspendedMX MO AV <= 15 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Solids, total suspendedMX WK AV <= 22.5 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Solids, total suspendedMX MO AV <= 13 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001Solids, total suspendedMX WK AV <= 18.8 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]CUM TOTL report only all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, organic total [as N]MY report only all year
001Nitrogen, ammonia total [as N]MX MO AV <= 1.5 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 7.5 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 1.3 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 6.3 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]MY report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]CUM TOTL report only all year
001Phosphorus, total [as P]MO TOTAL 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
001Chlorine, total residualMAXIMUM < .1 mg/L all year
001E. coliGX <= 126 MPN/100mL all year
001Phosphorous, in total orthophosphateMO AVG report only all year
001Phosphorous, in total orthophosphateMY report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % 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