CONSTELLATION ENERGY GENERATION, LLC

NPDES permit MD0002518 · Major NON-POTW · effective, expires 2026-11-30 · 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.

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

0values over a limit
0required values missing, on 0 form(s)
0of 24 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 (37)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMX DA AV <= 45 mg/L all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMX MO AV <= 30 mg/L all year
001Solids, total suspendedMX DA AV <= 45 mg/L all year
001Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
001Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
001Nitrogen, total [as N]DAILY MX report only Mar, Jun, Sep, Dec
001Nitrogen, total [as N]DAILY MX report only Mar, Jun, Sep, Dec
001Nitrogen, organic total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
001Nitrogen, organic total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
001Nitrogen, organic total [as N]DAILY MX report only Mar, Jun, Sep, Dec
001Nitrogen, organic total [as N]DAILY MX report only Mar, Jun, Sep, Dec
001Ammonia nitrogen, total, [as N] 30 dayQRTR AVG report only Mar, Jun, Sep, Dec
001Ammonia nitrogen, total, [as N] 30 dayQRTR AVG report only Mar, Jun, Sep, Dec
001Ammonia nitrogen, total, [as N] 30 dayDAILY MX report only Mar, Jun, Sep, Dec
001Ammonia nitrogen, total, [as N] 30 dayDAILY MX report only Mar, Jun, Sep, Dec
001Nitrite + Nitrate total [as N]QB report only Mar, Jun, Sep, Dec
001Nitrite + Nitrate total [as N]QB report only Mar, Jun, Sep, Dec
001Nitrite + Nitrate total [as N]DAILY MX report only Mar, Jun, Sep, Dec
001Nitrite + Nitrate total [as N]DAILY MX report only Mar, Jun, Sep, Dec
001Phosphorus, total [as P]QRTR AVG report only Mar, Jun, Sep, Dec
001Phosphorus, total [as P]QRTR AVG report only Mar, Jun, Sep, Dec
001Phosphorus, total [as P]DAILY MX report only Mar, Jun, Sep, Dec
001Phosphorus, total [as P]DAILY MX 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
001E. coliGEO MEAN <= 126 MPN/100mL all year
003Oxygen, dissolved [DO]MINIMUM >= 5 mg/L May, Jun, Jul, Aug, Sep, Oct
103Oil & GreaseQB <= 15 mg/L Mar, Jun, Sep, Dec
103Oil & GreaseQB <= 15 mg/L Mar, Jun, Sep, Dec
103Flow, in conduit or thru treatment plantQRTR AVG report only Mar, Jun, Sep, Dec
103Flow, in conduit or thru treatment plantQRTR AVG report only Mar, Jun, Sep, Dec
103Flow, in conduit or thru treatment plantQB report only Mar, Jun, Sep, Dec
103Flow, in conduit or thru treatment plantQB report only Mar, Jun, Sep, 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