Ranchester, Town of

NPDES permit WY0022161 · Minor POTW · effective, expires 2030-09-30 · 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

3values over a limit
0required values missing, on 0 form(s)
0of 41 forms filed late

Last period with anything received: 2026-06-30. Most often over: BOD, 5-day, percent removal (1), BOD, 5-day, 20 deg. C (1), E. coli (1).

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 (154)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY AV report only all year
001Temperature, water deg. centigradeDAILY AV 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. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 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. CDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG 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. CWKLY AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHINST MIN >= 6.5 SU all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG report only all year
001Solids, total suspendedWKLY AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG <= 100 mg/L all year
001Solids, total suspendedMO AVG <= 100 mg/L all year
001Solids, total suspendedWKLY AVG <= 150 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
001Nitrogen, ammonia total [as N]DAILY MX 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
001DurationMO TOTAL report only all year
001Chlorine, total residualMO AVG <= .22 mg/L May, Jun, Jul, Aug, Sep
001Chlorine, total residualMO AVG <= .22 mg/L May, Jun, Jul, Aug, Sep
001Chlorine, total residualMO AVG <= .18 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Chlorine, total residualMO AVG <= .18 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Chlorine, total residualDAILY MX <= .37 mg/L May, Jun, Jul, Aug, Sep
001Chlorine, total residualDAILY MX <= .37 mg/L May, Jun, Jul, Aug, Sep
001Chlorine, total residualDAILY MX <= .31 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Chlorine, total residualDAILY MX <= .31 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001E. coliMO AVG <= 630 MPN/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001E. coliMO AVG <= 126 MPN/100mL May, Jun, Jul, Aug, Sep
001E. coliDAILY MX <= 630 MPN/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001E. coliDAILY MX <= 235 MPN/100mL May, Jun, Jul, Aug, Sep
001Solids, total dissolvedDAILY MX report only all year
001FlowMO AVG <= .3 MGD all year
001FlowMO AVG <= .3 MGD all year
001FlowDAILY MX report only all year
001FlowDAILY MX report only all year
001BOD, 5-day, percent removalMO AV MN >= 65 % all year
001BOD, 5-day, percent removalMO AV MN >= 65 % all year
001Solids, suspended percent removalMO AV MN report only all year
001Solids, suspended percent removalMO AV MN report only all year
001Ammonia & ammonium- totalMO AVG <= 33 mg/L May, Jun, Jul, Aug, Sep, Oct
001Ammonia & ammonium- totalMO AVG <= 33 mg/L May, Jun, Jul, Aug, Sep, Oct
001Ammonia & ammonium- totalMO AVG <= 33.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Ammonia & ammonium- totalMO AVG <= 33.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Ammonia & ammonium- totalDAILY MX <= 109.7 mg/L May, Jun, Jul, Aug, Sep, Oct
001Ammonia & ammonium- totalDAILY MX <= 109.7 mg/L May, Jun, Jul, Aug, Sep, Oct
001Ammonia & ammonium- totalDAILY MX <= 74.2 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Ammonia & ammonium- totalDAILY MX <= 74.2 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Produced water, oil and greaseDAILY MX report only 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
002E. coliDAILY MX report only all year
002FlowANNL AVG report only all year
003BOD, 5-day, 20 deg. CDAILY MX report only all year
003pHINST MIN report only all year
003pHINST MAX report only all year
003Solids, total suspendedDAILY MX report only all year
003E. coliDAILY MX report only all year
003FlowANNL AVG report only all year
004Temperature, water deg. centigradeDAILY AV report only all year
004Temperature, water deg. centigradeDAILY AV report only all year
004Oxygen, dissolved [DO]DAILY MX report only all year
004BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L 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. CWKLY AVG <= 45 mg/L all year
004BOD, 5-day, 20 deg. CDAILY MX report only all year
004BOD, 5-day, 20 deg. CDAILY MX report only all year
004BOD, 5-day, 20 deg. CMO AVG report only all year
004BOD, 5-day, 20 deg. CMO AVG report only all year
004BOD, 5-day, 20 deg. CWKLY AVG report only all year
004BOD, 5-day, 20 deg. CWKLY AVG report only all year
004BOD, 5-day, 20 deg. CDAILY MX report only all year
004BOD, 5-day, 20 deg. CDAILY MX report only all year
004pHINST MIN >= 6.5 SU all year
004pHINST MIN >= 6.5 SU all year
004pHINST MAX <= 9 SU all year
004pHINST MAX <= 9 SU all year
004Solids, total suspendedMO AVG report only all year
004Solids, total suspendedMO AVG report only all year
004Solids, total suspendedWKLY AVG report only all year
004Solids, total suspendedWKLY AVG report only all year
004Solids, total suspendedDAILY MX report only all year
004Solids, total suspendedDAILY MX report only all year
004Solids, total suspendedMO AVG <= 100 mg/L all year
004Solids, total suspendedMO AVG <= 100 mg/L all year
004Solids, total suspendedWKLY AVG <= 150 mg/L all year
004Solids, total suspendedWKLY AVG <= 150 mg/L all year
004Solids, total suspendedDAILY MX report only all year
004Solids, total suspendedDAILY MX report only all year
004Nitrogen, ammonia total [as N]DAILY MX report only all year
004Nitrite + Nitrate total [as N]DAILY MX report only all year
004Phosphorus, total [as P]DAILY MX report only all year
004DurationMO TOTAL report only all year
004DurationMO TOTAL report only all year
004Chlorine, total residualMO AVG <= .22 mg/L May, Jun, Jul, Aug, Sep
004Chlorine, total residualMO AVG <= .22 mg/L May, Jun, Jul, Aug, Sep
004Chlorine, total residualMO AVG <= .18 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
004Chlorine, total residualMO AVG <= .18 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
004Chlorine, total residualDAILY MX <= .37 mg/L May, Jun, Jul, Aug, Sep
004Chlorine, total residualDAILY MX <= .37 mg/L May, Jun, Jul, Aug, Sep
004Chlorine, total residualDAILY MX <= .31 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
004Chlorine, total residualDAILY MX <= .31 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
004E. coliMO AVG <= 126 MPN/100mL May, Jun, Jul, Aug, Sep
004E. coliMO AVG <= 630 MPN/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
004E. coliDAILY MX <= 235 MPN/100mL May, Jun, Jul, Aug, Sep
004E. coliDAILY MX <= 630 MPN/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
004Solids, total dissolvedDAILY MX report only all year
004FlowMO AVG <= .3 MGD all year
004FlowMO AVG <= .3 MGD all year
004FlowDAILY MX report only all year
004FlowDAILY MX report only all year
004BOD, 5-day, percent removalMO AV MN >= 65 % all year
004BOD, 5-day, percent removalMO AV MN >= 65 % all year
004Solids, suspended percent removalMO AV MN report only all year
004Solids, suspended percent removalMO AV MN report only all year
004Ammonia & ammonium- totalMO AVG <= 33.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
004Ammonia & ammonium- totalMO AVG <= 33.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
004Ammonia & ammonium- totalMO AVG <= 33 mg/L May, Jun, Jul, Aug, Sep, Oct
004Ammonia & ammonium- totalMO AVG <= 33 mg/L May, Jun, Jul, Aug, Sep, Oct
004Ammonia & ammonium- totalDAILY MX <= 74.2 mg/L Jan, Feb, Mar, Apr, Nov, Dec
004Ammonia & ammonium- totalDAILY MX <= 74.2 mg/L Jan, Feb, Mar, Apr, Nov, Dec
004Ammonia & ammonium- totalDAILY MX <= 109.7 mg/L May, Jun, Jul, Aug, Sep, Oct
004Ammonia & ammonium- totalDAILY MX <= 109.7 mg/L May, Jun, Jul, Aug, Sep, Oct
004Produced water, oil and greaseDAILY MX report only all year
005BOD, 5-day, 20 deg. CDAILY MX report only all year
005pHINST MIN report only all year
005pHINST MAX report only all year
005Solids, total suspendedDAILY MX report only all year
005E. coliDAILY MX report only all year
005FlowANNL AVG report only all year
SUMQFlowMO AVG <= .3 MGD all year
SUMQFlowMO AVG <= .3 MGD all year
SUMQFlowDAILY MX report only all year
SUMQFlowDAILY 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