Northern States Power - Angus Anson Generating Plant

NPDES permit SD0000264 · Minor NON-POTW · administratively continued, expires 2015-11-30 · 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.

This permit expired on 2015-11-30 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)
0of 24 forms filed late

Last period with anything received: 2026-06-30.

Reporting

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

Limits in force (56)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitA1 report only all year
001Temperature, water deg. fahrenheitA1 report only all year
001Temperature, water deg. fahrenheitDAILY MX <= 90 deg F all year
001Temperature, water deg. fahrenheitDAILY MX <= 90 deg F all year
001Flow rate30DA AVG report only all year
001Flow rate30DA AVG report only all year
001Flow rateDAILY MX report only all year
001Flow rateDAILY MX report only all year
001ConductivityDAILY MX report only all year
001ConductivityDAILY MX report only all year
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001Alkalinity, total [as CaCO3]DAILY MX report only all year
001Alkalinity, total [as CaCO3]DAILY MX report only all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Nitrogen, nitrate total [as N]30DA AVG <= 50 mg/L all year
001Nitrogen, nitrate total [as N]30DA AVG <= 50 mg/L all year
001Nitrogen, nitrate total [as N]DAILY MX <= 88 mg/L all year
001Nitrogen, nitrate total [as N]DAILY MX <= 88 mg/L all year
001Floating solids, waste or visible foam-visualDAILY MX <= 0 N=0;Y=1 all year
001Floating solids, waste or visible foam-visualDAILY MX <= 0 N=0;Y=1 all year
001Chlorine, total residualDAILY MX <= .019 mg/L all year
001Chlorine, total residualDAILY MX <= .019 mg/L all year
001Flow, totalMO TOTAL report only all year
001Flow, totalMO TOTAL report only all year
001Solids, total dissolved30DA AVG <= 4000 mg/L all year
001Solids, total dissolved30DA AVG <= 4000 mg/L all year
001Solids, total dissolvedDAILY MX <= 4000 mg/L all year
001Solids, total dissolvedDAILY MX <= 4000 mg/L all year
001Duration of dischargeMO TOTAL report only all year
001Duration of dischargeMO TOTAL report only all year
001Hydrocarbons, total petroleumDAILY MX <= 10 mg/L all year
001Hydrocarbons, total petroleumDAILY MX <= 10 mg/L all year
001Oil and grease visualDAILY MX < 1 N=0;Y=1 all year
001Oil and grease visualDAILY MX < 1 N=0;Y=1 all year
001Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 7Day Chronic Pimephales promelasDAILY MX <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 7Day Chronic Pimephales promelasDAILY MX <= 0 pass=0;fail=1 all year
002Flow rate30DA AVG report only all year
002Flow rate30DA AVG report only all year
002Flow rateDAILY MX report only all year
002Flow rateDAILY MX report only all year
002Flow, totalMO TOTAL report only all year
002Flow, totalMO TOTAL report only all year
002Duration of dischargeMO TOTAL report only all year
002Duration of dischargeMO TOTAL 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