US Forest Service - Bighorn National Forest

NPDES permit WY0020931 · Minor FEDERAL · expired, expires 2024-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2024-06-30 and is expired: 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 22 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 (74)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 90 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CWKLY AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHINST MAX <= 9 SU all year
001pHINST MIN >= 6.5 SU all year
001Solids, total suspendedMO AVG <= 100 mg/L all year
001Solids, total suspendedWKLY AVG <= 150 mg/L all year
001Solids, total suspendedDAILY MX <= 300 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001DurationMO TOTAL report only all year
001Chlorine, total residualDAILY MX <= .011 mg/L all year
001E. coliMO GEOMN <= 630 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001E. coliMO GEOMN <= 126 #/100mL May, Jun, Jul, Aug, Sep
001E. coliDAILY MX <= 630 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001E. coliDAILY MX <= 576 #/100mL May, Jun, Jul, Aug, Sep
001FlowMO AVG <= .0025 MGD all year
001FlowDAILY MX report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
002BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
002BOD, 5-day, 20 deg. CDAILY MX <= 90 mg/L all year
002pHINST MIN >= 6.5 SU all year
002pHINST MAX <= 9 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedWKLY AVG <= 45 mg/L all year
002Solids, total suspendedDAILY MX <= 90 mg/L all year
002DurationMO TOTAL report only all year
002Chlorine, total residualDAILY MX <= .011 mg/L all year
002E. coliMO GEOMN <= 126 #/100mL all year
002E. coliMO GEOMN <= 630 #/100mL all year
002E. coliDAILY MX <= 576 #/100mL all year
002E. coliDAILY MX <= 630 #/100mL all year
002FlowDAILY MX report only all year
002FlowMO AVG report only all year
003BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
003BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
003BOD, 5-day, 20 deg. CDAILY MX <= 90 mg/L all year
003pHINST MIN >= 6.5 SU all year
003pHINST MAX <= 9 SU all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedWKLY AVG <= 45 mg/L all year
003Solids, total suspendedDAILY MX <= 90 mg/L all year
003DurationMO TOTAL report only all year
003Chlorine, total residualDAILY MX <= .011 mg/L all year
003E. coliMO GEOMN <= 630 #/100mL all year
003E. coliMO GEOMN <= 126 #/100mL all year
003E. coliDAILY MX <= 630 #/100mL all year
003E. coliDAILY MX <= 576 #/100mL all year
003FlowDAILY MX report only all year
003FlowMO AVG report only all year
004BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
004BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
004BOD, 5-day, 20 deg. CDAILY MX <= 90 mg/L all year
004pHINST MIN >= 6.5 SU all year
004pHINST MAX <= 9 SU all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Solids, total suspendedWKLY AVG <= 45 mg/L all year
004Solids, total suspendedDAILY MX <= 90 mg/L all year
004DurationMO TOTAL report only all year
004Chlorine, total residualDAILY MX <= .011 mg/L all year
004E. coliMO GEOMN <= 630 #/100mL all year
004E. coliMO GEOMN <= 126 #/100mL all year
004E. coliDAILY MX <= 630 #/100mL all year
004E. coliDAILY MX <= 576 #/100mL all year
004FlowDAILY MX report only all year
004FlowMO AVG report only all year
DMP1Temperature, water deg. centigradeDAILY MX report only all year
DMP1pHINST MIN report only all year
DMP1pHINST MAX report only all year
SUM1FlowMO AVG <= .0025 MGD all year
SUM1FlowDAILY 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