Black Hills Corp LCTF

NPDES permit SD0027871 · Minor NON-POTW · effective, expires 2027-08-31 · 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 12 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 SD permits in EPA's filings — check your permit).

Limits in force (22)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheit30DA AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Flow rate30DA AVG report only all year
001Flow rateDAILY MX report only all year
001Conductivity30DA AVG report only all year
001ConductivityDAILY MX report only all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Oil and grease, hexane extr methodDAILY MX <= 10 mg/L all year
001Selenium, total recoverable30DA AVG report only all year
001Selenium, total recoverableDAILY MX report only all year
001Zinc, total recoverable30DA AVG report only all year
001Zinc, total recoverableDAILY MX report only all year
001Cadmium, total recoverable30DA AVG report only all year
001Cadmium, total recoverableDAILY MX report only all year
001Copper, total recoverable30DA AVG report only all year
001Copper, total recoverableDAILY MX report only all year
001Floating solids, waste or visible foam-visualDAILY MX <= 0 abst=0;prst=1 all year
001Chlorine, total residualDAILY MX <= .019 mg/L all year
001Solids, total dissolved30DA AVG report only all year
001Solids, total dissolvedDAILY MX report only all year
001Oil and grease visualDAILY MX <= 0 abst=0;prst=1 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