Tennessee Valley Authority (TVA)

NPDES permit TN0026450 · Major FEDERAL · administratively continued, expires 2025-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2025-07-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
0required values missing, on 0 form(s)
10of 55 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (47)

OutfallParameterStatisticLimitMonths
101Temperature, water deg. centigradeDAILY MX report only all year
101Temperature, water deg. centigradeDAILY MX <= 30.5 deg C all year
101Temp. diff. between samp. & upstrm deg. CDAILY MX <= 3 deg C Apr, May, Jun, Jul, Aug, Sep, Oct
101Temp. diff. between samp. & upstrm deg. CDAILY MX <= 5 deg C Jan, Feb, Mar, Nov, Dec
101Polychlorinated biphenyls [PCBs]DAILY MX <= 0 ppm all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
101Chlorine, total residualMO AVG <= .027 mg/L all year
101Chlorine, total residualDAILY MX <= .047 mg/L all year
101Temperature rate of change deg. C/hrDAILY MX <= 2 deg C/hr all year
101IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 69 % all year
101IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMINIMUM > 69 % all year
103pHMINIMUM >= 6 SU all year
103pHMAXIMUM <= 9 SU all year
103Solids, total suspendedMO AVG <= 30 mg/L all year
103Solids, total suspendedDAILY MX <= 100 mg/L all year
103Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
103Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
103Flow, in conduit or thru treatment plantMO AVG report only all year
103Flow, in conduit or thru treatment plantDAILY MX report only all year
107pHMINIMUM >= 6 SU all year
107pHMAXIMUM <= 9 SU all year
107Solids, total suspendedMO AVG <= 30 mg/L all year
107Solids, total suspendedDAILY MX <= 100 mg/L all year
107Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
107Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
107Copper, total [as Cu]MO AVG <= 1 mg/L all year
107Copper, total [as Cu]DAILY MX <= 1 mg/L all year
107Iron, total [as Fe]MO AVG <= 1 mg/L all year
107Iron, total [as Fe]DAILY MX <= 1 mg/L all year
110Temperature, water deg. centigradeDAILY MX report only all year
110Temperature, water deg. centigradeDAILY MX <= 30.5 deg C all year
110Temp. diff. between samp. & upstrm deg. CDAILY MX <= 5 deg C Jan, Feb, Mar, Nov, Dec
110Temp. diff. between samp. & upstrm deg. CDAILY MX <= 3 deg C Apr, May, Jun, Jul, Aug, Sep, Oct
110Polychlorinated biphenyls [PCBs]DAILY MX <= 0 ppm all year
110Flow, in conduit or thru treatment plantMO AVG report only all year
110Flow, in conduit or thru treatment plantDAILY MX report only all year
110Chlorine, total residualMO AVG <= .027 mg/L all year
110Chlorine, total residualDAILY MX <= .047 mg/L all year
110Temperature rate of change deg. C/hrDAILY MX <= 2 deg C/hr all year
110IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 69 % all year
110IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMINIMUM > 69 % all year
118Oxygen, dissolved [DO]MINIMUM >= 2 mg/L all year
118Solids, total suspendedDAILY MX <= 100 mg/L all year
118Solids, settleableDAILY MX <= 1 mL/L all year
118Flow, in conduit or thru treatment plantMO AVG report only all year
118Flow, in conduit or thru treatment plantDAILY 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