VAUGHN CASCADE COUNTY WATER SEWER DISTRICT

NPDES permit MT0021440 · Minor POTW · administratively continued, expires 2017-11-30 · 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.

This permit expired on 2017-11-30 and is administratively continued: 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 16 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MT permits in EPA's filings — check your permit).

Limits in force (38)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. centigradeMO AVG report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002Flow rateMO AVG report only all year
002Flow rateDAILY MX report only all year
002BOD, 5-day, 20 deg. CMN WK AV report only all year
002BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CMX WK AV <= 45 mg/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 22.4 lb/d all year
002BOD, 5-day, 20 deg. CMX WK AV <= 33.6 lb/d all year
002BOD, 5-day, 20 deg. CMO AVG report only all year
002BOD, 5-day, 20 deg. CWKLY AVG report only all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMN WK AV report only all year
002Solids, total suspendedMO AVG <= 45 mg/L all year
002Solids, total suspendedMX WK AV <= 65 mg/L all year
002Solids, total suspendedMO AVG <= 33.6 lb/d all year
002Solids, total suspendedMX WK AV <= 48.5 lb/d all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedWKLY AVG report only all year
002Oil and grease, hexane extr methodQRTR AVG report only all year
002Nitrogen, total [as N]MO AVG report only May, Jun, Jul, Aug, Sep
002Nitrogen, total [as N]MO AVG report only May, Jun, Jul, Aug, Sep
002Nitrogen, ammonia total [as N]MO AVG <= 9.5 mg/L all year
002Nitrogen, ammonia total [as N]DAILY MX <= 13 mg/L all year
002Nitrogen, Kjeldahl, total [as N]MO AVG report only May, Jun, Jul, Aug, Sep
002Nitrite + Nitrate total [as N]MO AVG report only May, Jun, Jul, Aug, Sep
002Phosphorus, total [as P]MO AVG report only May, Jun, Jul, Aug, Sep
002Phosphorus, total [as P]MO AVG report only May, Jun, Jul, Aug, Sep
002E. coli, MTEC-MFMO AVG <= 630 MPN/100mL Jan, Feb, Mar, Nov, Dec
002E. coli, MTEC-MFMO AVG <= 126 MPN/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
002E. coli, MTEC-MFWKLY AVG <= 1260 MPN/100mL Jan, Feb, Mar, Nov, Dec
002E. coli, MTEC-MFWKLY AVG <= 252 MPN/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
002Chlorine, total residualDAILY MN report only all year
002Chlorine, total residualMO AVG <= .011 mg/L all year
002Chlorine, total residualDAILY MX <= .019 mg/L all year
002BOD, 5-day, percent removalMO MIN >= 85 % all year
002Solids, suspended percent removalMO MIN >= 65 % 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