CITY OF RICHLAND

NPDES permit IA0061328 · Minor POTW · effective, expires 2027-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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: 2026-08-31.

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among IA permits in EPA's filings — check your permit).

Limits in force (28)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspended30DA AVG <= 80 mg/L all year
001Solids, total suspended7 DA AVG <= 120 mg/L all year
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Jan
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Apr
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Oct
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Sep
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Jun
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Nov
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Mar
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Dec
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Feb
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 36 mg/L Jul
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 36 mg/L Aug
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L May
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Jan
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Apr
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Oct
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Sep
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Jun
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Nov
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Mar
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Feb
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 36 mg/L Jul
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 36 mg/L Aug
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L May

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