GenOn Chalk Point, LLC

NPDES permit MD0002658 · Major NON-POTW · effective, expires 2030-02-28 · 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

2values over a limit
0required values missing, on 0 form(s)
4of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (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 (33)

OutfallParameterStatisticLimitMonths
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
102pHMINIMUM >= 6.5 SU all year
102pHMAXIMUM <= 8.5 SU all year
102Solids, total suspendedMO AVG <= 30 mg/L all year
102Solids, total suspendedDAILY MX <= 50 mg/L all year
102Oil & GreaseMO AVG <= 15 mg/L all year
102Oil & GreaseDAILY MX <= 20 mg/L all year
102Nitrogen, total [as N]MO AVG report only all year
102Nitrogen, total [as N]DAILY MX report only all year
102Nitrogen, total [as N]MY report only all year
102Nitrogen, total [as N]ANNL MAX <= 1500 lb/yr all year
102Nitrogen, organic total [as N]MO AVG report only all year
102Nitrogen, organic total [as N]DAILY MX report only all year
102Ammonia nitrogen, total, [as N] 30 dayMO AVG report only all year
102Ammonia nitrogen, total, [as N] 30 dayMO AVG report only all year
102Ammonia nitrogen, total, [as N] 30 dayDAILY MX report only all year
102Ammonia nitrogen, total, [as N] 30 dayDAILY MX report only all year
102Ammonia nitrogen, total, [as N] 30 dayDAILY MX <= 25 lb/d all year
102Nitrite + Nitrate total [as N]MO AVG report only all year
102Nitrite + Nitrate total [as N]DAILY MX report only all year
102Phosphorus, total [as P]MO AVG report only all year
102Phosphorus, total [as P]DAILY MX report only all year
102Phosphorus, total [as P]MY report only all year
102Phosphorus, total [as P]ANNL MAX <= 30 lb/yr all year
102Copper, total [as Cu]DAILY MX <= 1 mg/L all year
102Iron, total [as Fe]DAILY MX <= 1 mg/L all year
102Oxidants, total residualMO AVG <= .0075 mg/L all year
102Oxidants, total residualDAILY MX <= .013 mg/L all year
102Flow, in conduit or thru treatment plantDAILY MX <= 10000 gal/d all year
102Flow, in conduit or thru treatment plantMO AVG report only all year
102Flow, in conduit or thru treatment plantDAILY MX report only all year
102Temperature, summer [deg. F]DAILY 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