Lower Brule Sioux Tribe

NPDES permit SD0020800 · Minor POTW · effective, expires 2026-12-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
6required values missing, on 1 form(s)
8of 12 forms filed late

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

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 (32)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. C7 DA AVG <= 45 mg/L all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspended7 DA AVG <= 45 mg/L all year
001Oil & GreaseDAILY MX <= 10 mg/L all year
001Nitrogen, total [as N]30DA AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]30DA AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Phosphorus, total [as P]30DA AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Chlorine, total residual30DA AVG <= 11 ug/L all year
001Chlorine, total residualDAILY MX <= 19 ug/L all year
001E. coli30DA GM <= 126 #/100mL all year
001E. coliDAILY MX <= 410 #/100mL all year
001Flow30DA AVG report only all year
001FlowDAILY MX report only all year
001BOD, 5-day, percent removalMO AV MN >= 65 % all year
001Solids, suspended percent removalMO AV MN >= 65 % all year
001Oil and grease visualINST MAX <= 0 N=0;Y=1 all year
I001BOD, 5-day, 20 deg. C30DA AVG report only all year
I001BOD, 5-day, 20 deg. CDAILY MX report only all year
I001Solids, total suspended30DA AVG report only all year
I001Solids, total suspendedDAILY MX report only all year
R001Temperature, water deg. centigrade30DA AVG report only all year
R001Temperature, water deg. centigradeDAILY MX report only all year
R001pHMINIMUM report only all year
R001pHMAXIMUM report only all year
R001Nitrogen, ammonia total [as N]30DA AVG report only all year
R001Nitrogen, ammonia total [as N]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