Four Rivers Nuclear Partnership LLC - Paducah Gaseous Diffusion Plant

NPDES permit KY0004049 · Major FEDERAL · effective, expires 2028-01-31 · EPA's file as of 2026-09-19

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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

3values over a limit
0required values missing, on 0 form(s)
0of 181 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (3).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among KY permits in EPA's filings — check your permit).

Limits in force (315)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMAXIMUM <= 89 deg F all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 60 mg/L all year
001Oil & GreaseMO AVG <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Alpha, totalMO AVG report only all year
001Alpha, totalDAILY MX report only all year
001Beta, totalMO AVG report only all year
001Beta, totalDAILY MX report only all year
001ToxicityMAXIMUM <= 1 tox chronic all year
001Technetium 99, total [14]MO AVG report only all year
001Technetium 99, total [14]DAILY MX report only all year
001Uranium, totalMO AVG report only all year
001Uranium, totalDAILY MX report only all year
001TrichloroethyleneMO AVG report only all year
001TrichloroethyleneDAILY MX report only all year
001Polychlorinated biphenyls [PCBs]MO AVG report only all year
001Polychlorinated biphenyls [PCBs]DAILY MX 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 residualMO AVG <= .011 mg/L all year
001Chlorine, total residualDAILY MX <= .019 mg/L all year
002Temperature, water deg. fahrenheitMAXIMUM <= 89 deg F all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 60 mg/L all year
002Oil & GreaseMO AVG <= 10 mg/L all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Hardness, total [as CaCO3]MO AVG report only all year
002Hardness, total [as CaCO3]DAILY MX report only all year
002Copper, total recoverableMO AVG report only all year
002Copper, total recoverableDAILY MX report only all year
002Alpha, totalMO AVG report only all year
002Alpha, totalDAILY MX report only all year
002Beta, totalMO AVG report only all year
002Beta, totalDAILY MX report only all year
002Technetium 99, total [14]MO AVG report only all year
002Technetium 99, total [14]DAILY MX report only all year
002Uranium, totalMO AVG report only all year
002Uranium, totalDAILY MX report only all year
002TrichloroethyleneMO AVG report only all year
002TrichloroethyleneDAILY MX report only all year
002Polychlorinated biphenyls [PCBs]MO AVG report only all year
002Polychlorinated biphenyls [PCBs]DAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
004BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
004BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Solids, total suspendedDAILY MX <= 60 mg/L all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
006pHMINIMUM >= 6 SU all year
006pHMAXIMUM <= 9 SU all year
006Solids, total suspendedMO AVG <= 30 mg/L all year
006Solids, total suspendedDAILY MX <= 60 mg/L all year
006Oil & GreaseMO AVG <= 10 mg/L all year
006Oil & GreaseDAILY MX <= 15 mg/L all year
006Phosphorus, total [as P]MO AVG report only all year
006Phosphorus, total [as P]DAILY MX report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Chlorine, total residualMO AVG <= 11 ug/L all year
006Chlorine, total residualDAILY MX <= 19 ug/L all year
008Temperature, water deg. fahrenheitMAXIMUM <= 89 deg F all year
008pHMINIMUM >= 6 SU all year
008pHMAXIMUM <= 9 SU all year
008Solids, total suspendedMO AVG <= 30 mg/L all year
008Solids, total suspendedDAILY MX <= 60 mg/L all year
008Oil & GreaseMO AVG <= 10 mg/L all year
008Oil & GreaseDAILY MX <= 15 mg/L all year
008Phosphorus, total [as P]MO AVG report only all year
008Phosphorus, total [as P]DAILY MX report only all year
008Alpha, totalMO AVG report only all year
008Alpha, totalDAILY MX report only all year
008Beta, totalMO AVG report only all year
008Beta, totalDAILY MX report only all year
008Technetium 99, total [14]MO AVG report only all year
008Technetium 99, total [14]DAILY MX report only all year
008Uranium, totalMO AVG report only all year
008Uranium, totalDAILY MX report only all year
008TrichloroethyleneMO AVG report only all year
008TrichloroethyleneDAILY MX report only all year
008Polychlorinated biphenyls [PCBs]MO AVG report only all year
008Polychlorinated biphenyls [PCBs]DAILY MX report only all year
008Flow, in conduit or thru treatment plantMO AVG report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
008Chlorine, total residualMO AVG report only all year
008Chlorine, total residualDAILY MX report only all year
008Mercury, total recoverableMO AVG <= .051 ug/L all year
008Mercury, total recoverableDAILY MX <= 1.4 ug/L all year
009pHMINIMUM >= 6 SU all year
009pHMAXIMUM <= 9 SU all year
009Solids, total suspendedMO AVG <= 30 mg/L all year
009Solids, total suspendedDAILY MX <= 60 mg/L all year
009Oil & GreaseMO AVG <= 10 mg/L all year
009Oil & GreaseDAILY MX <= 15 mg/L all year
009Phosphorus, total [as P]MO AVG report only all year
009Phosphorus, total [as P]DAILY MX report only all year
009Alpha, totalMO AVG report only all year
009Alpha, totalDAILY MX report only all year
009Beta, totalMO AVG report only all year
009Beta, totalDAILY MX report only all year
009Technetium 99, total [14]MO AVG report only all year
009Technetium 99, total [14]DAILY MX report only all year
009Uranium, totalMO AVG report only all year
009Uranium, totalDAILY MX report only all year
009TrichloroethyleneMO AVG report only all year
009TrichloroethyleneDAILY MX report only all year
009Polychlorinated biphenyls [PCBs]MO AVG report only all year
009Polychlorinated biphenyls [PCBs]DAILY MX report only all year
009Flow, in conduit or thru treatment plantMO AVG report only all year
009Flow, in conduit or thru treatment plantDAILY MX report only all year
010pHMINIMUM >= 6 SU all year
010pHMAXIMUM <= 9 SU all year
010Solids, total suspendedMO AVG <= 30 mg/L all year
010Solids, total suspendedDAILY MX <= 60 mg/L all year
010Oil & GreaseMO AVG <= 10 mg/L all year
010Oil & GreaseDAILY MX <= 15 mg/L all year
010Alpha, totalMO AVG report only all year
010Alpha, totalDAILY MX report only all year
010Beta, totalMO AVG report only all year
010Beta, totalDAILY MX report only all year
010ToxicityMAXIMUM <= 1 tox chronic all year
010Technetium 99, total [14]MO AVG report only all year
010Technetium 99, total [14]DAILY MX report only all year
010Uranium, totalMO AVG report only all year
010Uranium, totalDAILY MX report only all year
010TrichloroethyleneMO AVG report only all year
010TrichloroethyleneDAILY MX report only all year
010Polychlorinated biphenyls [PCBs]MO AVG report only all year
010Polychlorinated biphenyls [PCBs]DAILY MX report only all year
010Flow, in conduit or thru treatment plantMO AVG report only all year
010Flow, in conduit or thru treatment plantDAILY MX report only all year
011pHMINIMUM >= 6 SU all year
011pHMAXIMUM <= 9 SU all year
011Solids, total suspendedMO AVG <= 30 mg/L all year
011Solids, total suspendedDAILY MX <= 60 mg/L all year
011Oil & GreaseMO AVG <= 10 mg/L all year
011Oil & GreaseDAILY MX <= 15 mg/L all year
011Alpha, totalMO AVG report only all year
011Alpha, totalDAILY MX report only all year
011Beta, totalMO AVG report only all year
011Beta, totalDAILY MX report only all year
011ToxicityMAXIMUM <= 1 tox chronic all year
011Technetium 99, total [14]MO AVG report only all year
011Technetium 99, total [14]DAILY MX report only all year
011Uranium, totalMO AVG report only all year
011Uranium, totalDAILY MX report only all year
011TrichloroethyleneMO AVG report only all year
011TrichloroethyleneDAILY MX report only all year
011Polychlorinated biphenyls [PCBs]MO AVG report only all year
011Polychlorinated biphenyls [PCBs]DAILY MX report only all year
011Flow, in conduit or thru treatment plantMO AVG report only all year
011Flow, in conduit or thru treatment plantDAILY MX report only all year
012pHMINIMUM >= 6 SU all year
012pHMAXIMUM <= 9 SU all year
012Solids, total suspendedMO AVG <= 30 mg/L all year
012Solids, total suspendedDAILY MX <= 60 mg/L all year
012Oil & GreaseMO AVG <= 10 mg/L all year
012Oil & GreaseDAILY MX <= 15 mg/L all year
012Alpha, totalMO AVG report only all year
012Alpha, totalDAILY MX report only all year
012Beta, totalMO AVG report only all year
012Beta, totalDAILY MX report only all year
012Technetium 99, total [14]MO AVG report only all year
012Technetium 99, total [14]DAILY MX report only all year
012Uranium, totalMO AVG report only all year
012Uranium, totalDAILY MX report only all year
012TrichloroethyleneMO AVG report only all year
012TrichloroethyleneDAILY MX report only all year
012Polychlorinated biphenyls [PCBs]MO AVG report only all year
012Polychlorinated biphenyls [PCBs]DAILY MX report only all year
012Flow, in conduit or thru treatment plantMO AVG report only all year
012Flow, in conduit or thru treatment plantDAILY MX report only all year
013pHMINIMUM >= 6 SU all year
013pHMAXIMUM <= 9 SU all year
013Solids, total suspendedMO AVG <= 30 mg/L all year
013Solids, total suspendedDAILY MX <= 60 mg/L all year
013Oil & GreaseMO AVG <= 10 mg/L all year
013Oil & GreaseDAILY MX <= 15 mg/L all year
013Hardness, total [as CaCO3]MO AVG report only all year
013Hardness, total [as CaCO3]DAILY MX report only all year
013Zinc, total recoverableMO AVG report only all year
013Zinc, total recoverableDAILY MX <= 119 ug/L all year
013Alpha, totalMO AVG report only all year
013Alpha, totalDAILY MX report only all year
013Beta, totalMO AVG report only all year
013Beta, totalDAILY MX report only all year
013Technetium 99, total [14]MO AVG report only all year
013Technetium 99, total [14]DAILY MX report only all year
013Uranium, totalMO AVG report only all year
013Uranium, totalDAILY MX report only all year
013TrichloroethyleneMO AVG report only all year
013TrichloroethyleneDAILY MX report only all year
013Polychlorinated biphenyls [PCBs]MO AVG report only all year
013Polychlorinated biphenyls [PCBs]DAILY MX report only all year
013Flow, in conduit or thru treatment plantMO AVG report only all year
013Flow, in conduit or thru treatment plantDAILY MX report only all year
015pHMINIMUM >= 6 SU all year
015pHMAXIMUM <= 9 SU all year
015Solids, total suspendedMO AVG <= 30 mg/L all year
015Solids, total suspendedDAILY MX <= 60 mg/L all year
015Oil & GreaseMO AVG <= 10 mg/L all year
015Oil & GreaseDAILY MX <= 15 mg/L all year
015Phosphorus, total [as P]MO AVG report only all year
015Phosphorus, total [as P]DAILY MX report only all year
015Alpha, totalMO AVG report only all year
015Alpha, totalDAILY MX report only all year
015Beta, totalMO AVG report only all year
015Beta, totalDAILY MX report only all year
015Technetium 99, total [14]MO AVG report only all year
015Technetium 99, total [14]DAILY MX report only all year
015Uranium, totalMO AVG report only all year
015Uranium, totalDAILY MX report only all year
015TrichloroethyleneMO AVG report only all year
015TrichloroethyleneDAILY MX report only all year
015Polychlorinated biphenyls [PCBs]MO AVG report only all year
015Polychlorinated biphenyls [PCBs]DAILY MX report only all year
015Flow, in conduit or thru treatment plantMO AVG report only all year
015Flow, in conduit or thru treatment plantDAILY MX report only all year
016pHMINIMUM >= 6 SU all year
016pHMAXIMUM <= 9 SU all year
016Solids, total suspendedMO AVG <= 30 mg/L all year
016Solids, total suspendedDAILY MX <= 60 mg/L all year
016Oil & GreaseMO AVG <= 10 mg/L all year
016Oil & GreaseDAILY MX <= 15 mg/L all year
016Phosphorus, total [as P]MO AVG report only all year
016Phosphorus, total [as P]DAILY MX report only all year
016Alpha, totalMO AVG report only all year
016Alpha, totalDAILY MX report only all year
016Beta, totalMO AVG report only all year
016Beta, totalDAILY MX report only all year
016Technetium 99, total [14]MO AVG report only all year
016Technetium 99, total [14]DAILY MX report only all year
016Uranium, totalMO AVG report only all year
016Uranium, totalDAILY MX report only all year
016TrichloroethyleneMO AVG report only all year
016TrichloroethyleneDAILY MX report only all year
016Polychlorinated biphenyls [PCBs]MO AVG report only all year
016Polychlorinated biphenyls [PCBs]DAILY MX report only all year
016Flow, in conduit or thru treatment plantMO AVG report only all year
016Flow, in conduit or thru treatment plantDAILY MX report only all year
017pHMINIMUM >= 6 SU all year
017pHMAXIMUM <= 9 SU all year
017Solids, total suspendedMO AVG <= 30 mg/L all year
017Solids, total suspendedDAILY MX <= 60 mg/L all year
017Oil & GreaseMO AVG <= 10 mg/L all year
017Oil & GreaseDAILY MX <= 15 mg/L all year
017Phosphorus, total [as P]MO AVG report only all year
017Phosphorus, total [as P]DAILY MX report only all year
017Hardness, total [as CaCO3]MO AVG report only all year
017Hardness, total [as CaCO3]DAILY MX report only all year
017Zinc, total recoverableMO AVG report only all year
017Zinc, total recoverableDAILY MX report only all year
017Alpha, totalMO AVG report only all year
017Alpha, totalDAILY MX report only all year
017Beta, totalMO AVG report only all year
017Beta, totalDAILY MX report only all year
017ToxicityMAXIMUM <= 1 tox acute all year
017Technetium 99, total [14]MO AVG report only all year
017Technetium 99, total [14]DAILY MX report only all year
017Uranium, totalMO AVG report only all year
017Uranium, totalDAILY MX report only all year
017TrichloroethyleneMO AVG report only all year
017TrichloroethyleneDAILY MX report only all year
017Polychlorinated biphenyls [PCBs]MO AVG report only all year
017Polychlorinated biphenyls [PCBs]DAILY MX report only all year
017Flow, in conduit or thru treatment plantMO AVG report only all year
017Flow, in conduit or thru treatment plantDAILY MX report only all year
019pHMINIMUM >= 6 SU all year
019pHMAXIMUM <= 9 SU all year
019Solids, total suspendedMO AVG <= 30 mg/L all year
019Solids, total suspendedDAILY MX <= 60 mg/L all year
019Oil & GreaseMO AVG <= 10 mg/L all year
019Oil & GreaseDAILY MX <= 15 mg/L all year
019Alpha, totalMO AVG report only all year
019Alpha, totalDAILY MX report only all year
019Beta, totalMO AVG report only all year
019Beta, totalDAILY MX report only all year
019Technetium 99, total [14]MO AVG report only all year
019Technetium 99, total [14]DAILY MX report only all year
019Uranium, totalMO AVG report only all year
019Uranium, totalDAILY MX report only all year
019TrichloroethyleneMO AVG report only all year
019TrichloroethyleneDAILY MX report only all year
019Polychlorinated biphenyls [PCBs]MO AVG report only all year
019Polychlorinated biphenyls [PCBs]DAILY MX report only all year
019Flow, in conduit or thru treatment plantMO AVG report only all year
019Flow, in conduit or thru treatment plantDAILY MX report only all year
020pHMINIMUM >= 6 SU all year
020pHMAXIMUM <= 9 SU all year
020Solids, total suspendedMO AVG <= 30 mg/L all year
020Solids, total suspendedDAILY MX <= 60 mg/L all year
020Oil & GreaseMO AVG <= 10 mg/L all year
020Oil & GreaseDAILY MX <= 15 mg/L all year
020Alpha, totalMO AVG report only all year
020Alpha, totalDAILY MX report only all year
020Beta, totalMO AVG report only all year
020Beta, totalDAILY MX report only all year
020Technetium 99, total [14]MO AVG report only all year
020Technetium 99, total [14]DAILY MX report only all year
020Uranium, totalMO AVG report only all year
020Uranium, totalDAILY MX report only all year
020TrichloroethyleneMO AVG report only all year
020TrichloroethyleneDAILY MX report only all year
020Polychlorinated biphenyls [PCBs]MO AVG report only all year
020Polychlorinated biphenyls [PCBs]DAILY MX report only all year
020Flow, in conduit or thru treatment plantMO AVG report only all year
020Flow, in conduit or thru treatment plantDAILY MX report only all year

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