Cheyenne Board of Public Utilities

NPDES permit WY0022381 · Major POTW · effective, expires 2028-10-31 · 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

3values over a limit
0required values missing, on 0 form(s)
0of 27 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (1), Copper, dissolved [as Cu] (1), E. coli (1).

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 (44)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only all year
001Oxygen, dissolved [DO]DAILY MX report only all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 27 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedWKLY AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]DAILY MX <= 29.5 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 2.79 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 4.54 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 23 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Cadmium, dissolved [as Cd]MO AVG <= .4 ug/L all year
001Copper, dissolved [as Cu]MO AVG <= 18.2 ug/L all year
001Selenium, total [as Se]MO AVG <= 5 ug/L all year
001Phosphate, ortho [as P]DAILY MX report only all year
001DurationMO TOTAL report only all year
001Chlorine, total residualDAILY MX <= .011 mg/L all year
001E. coliMO GEOMN <= 126 #/100mL May, Jun, Jul, Aug, Sep
001E. coliMO GEOMN <= 630 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001E. coliDAILY MX <= 235 #/100mL May, Jun, Jul, Aug, Sep
001E. coliDAILY MX <= 630 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Solids, total dissolved [TDS]DAILY MX report only all year
001FlowDAILY MX <= 6.5 MGD all year
001FlowMO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG report only all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
001BOD, carbonaceous, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Produced water, oil and greaseDAILY MX <= 10 mg/L all year
001Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7E <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7E <= 0 pass=0;fail=1 all year
DMP1pHINST MAX report only all year
DMP1pHINST MIN report only all year
DMP1Hardness, total [as CaCO3]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