Dayton, Town of

NPDES permit WY0020435 · Minor NON-POTW · effective, expires 2028-12-31 · 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 25 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 WY permits in EPA's filings — check your permit).

Limits in force (42)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only all year
001Oxygen, dissolved [DO]DAILY MX report only all year
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 report only 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 MIN >= 6.5 SU all year
001pHINST MAX <= 9 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 report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedWKLY AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001DurationMO TOTAL report only all year
001Chlorine, total residualDAILY MX <= 1.91 mg/L May, Jun, Jul, Aug, Sep
001Chlorine, total residualDAILY MX <= 1.51 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Chlorine, total residualMO AVG <= 1.1 mg/L May, Jun, Jul, Aug, Sep
001Chlorine, total residualMO AVG <= .88 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
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 <= 298 #/100mL May, Jun, Jul, Aug, Sep
001E. coliDAILY MX <= 630 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Solids, total dissolvedDAILY MX report only all year
001FlowMO AVG <= .3 MGD 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
001Produced water, oil and greaseDAILY MX <= 10 mg/L all year
002BOD, 5-day, 20 deg. CDAILY MX report only all year
002pHINST MIN report only all year
002pHINST MAX report only all year
002Solids, total suspendedDAILY MX report only all year
002Chlorine, total residualDAILY MX report only all year
002E. coliDAILY MX report only all year
002E. coliMO GEOMN report only all year
002FlowMO AVG report only all year
002FlowDAILY 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