Union Sanitary District

NPDES permit CA0038733 · Minor POTW · expired, expires 2025-11-30 · 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 2025-11-30 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 12 forms filed late

Last period with anything received: 2026-04-30.

Reporting

Reports are due about 32 days after each monitoring period ends (the most common figure among CA permits in EPA's filings — check your permit).

Limits in force (46)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeINST MAX report only all year
001Temperature, water deg. centigradeINST MAX report only all year
001Temperature, water deg. centigradeINST MAX report only all year
001Temperature, water deg. centigradeINST MAX report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMINIMUM >= 6.5 SU all year
001pHMINIMUM >= 6.5 SU all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Lead, total recoverableMO AVG <= 3.4 ug/L all year
001Lead, total recoverableMO AVG <= 3.4 ug/L all year
001Lead, total recoverableDAILY MX <= 7.1 ug/L all year
001Lead, total recoverableDAILY MX <= 7.1 ug/L all year
001Copper, total recoverableMO AVG <= 11 ug/L all year
001Copper, total recoverableMO AVG <= 11 ug/L all year
001Copper, total recoverableDAILY MX <= 16 ug/L all year
001Copper, total recoverableDAILY MX <= 16 ug/L all year
001Oil and greaseDAILY MX <= 20 mg/L all year
001Oil and greaseDAILY MX <= 20 mg/L all year
001Chlorine, total residual1I <= .019 mg/L all year
001Chlorine, total residual1I <= .019 mg/L all year
001Chlorine, total residual1I <= .019 mg/L all year
001Chlorine, total residual1I <= .019 mg/L all year
001E. coliDAILY MX <= 320 CFU/100mL all year
001E. coliDAILY MX <= 320 CFU/100mL all year
001E. coliDAILY MX <= 320 CFU/100mL all year
001E. coliDAILY MX <= 320 CFU/100mL all year
001Volume, totalTOTAL report only all year
001Volume, totalTOTAL report only all year
001Volume, totalTOTAL report only all year
001Volume, totalTOTAL report only all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
001Duration of dischargeTOTAL report only all year
001Duration of dischargeTOTAL report only all year
001Duration of dischargeTOTAL report only all year
001Duration of dischargeTOTAL 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