City of Southwest City

NPDES permit MO0135453 · Minor POTW · administratively continued, expires 2025-12-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2025-12-31 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 30 forms filed late

Last period with anything received: 2026-07-31.

Reporting

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

Limits in force (46)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
001Oil and grease [soxhlet extr.] tot.MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX <= 17.8 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 17.8 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 17.8 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 17.8 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 17.8 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 14.8 mg/L Aug
001Nitrogen, ammonia total [as N]MO AVG <= 10.7 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 8.6 mg/L Sep
001Nitrogen, ammonia total [as N]MO AVG <= 13.2 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 8.3 mg/L Jun
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 7 mg/L Jul
001Nitrogen, ammonia total [as N]MO AVG <= 6.2 mg/L Aug
001Nitrogen, nitrate total [as N]DAILY MX <= 31.1 mg/L all year
001Nitrogen, nitrate total [as N]MO AVG <= 15.5 mg/L all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001E. coliDAILY MX <= 235 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001E. coli30DA GM <= 126 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 20 mg/L all year
001BOD, carbonaceous, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
INFSolids, total suspendedMO AVG report only all year
INFNitrogen, ammonia total [as N]DAILY MX report only all year
INFNitrogen, ammonia total [as N]MO AVG report only all year
INFNitrogen, Kjeldahl, total [as N]DAILY MX report only all year
INFNitrogen, Kjeldahl, total [as N]MO AVG report only all year
INFNitrite + Nitrate total [as N]DAILY MX report only all year
INFNitrite + Nitrate total [as N]MO AVG report only all year
INFPhosphorus, total [as P]DAILY MX report only all year
INFPhosphorus, total [as P]MO AVG report only all year
INFBOD, carbonaceous [5 day, 20 C]MO AVG 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