CITY OF CEDAR RAPIDS

NPDES permit IA0042641 · Major POTW · effective, expires 2030-08-31 · 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
2required values missing, on 1 form(s)
0of 33 forms filed late

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

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 (153)

OutfallParameterStatisticLimitMonths
001Streamflow30DA AVG report only all year
001StreamflowDAILY MX report only all year
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 4.1 lb/CFS/d Aug
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 4.5 lb/CFS/d Apr
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 4.2 lb/CFS/d Sep
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 4.5 lb/CFS/d Jul
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 3.6 lb/CFS/d Jun
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 11.5 lb/CFS/d Feb
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 4.5 lb/CFS/d Nov
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 4.5 lb/CFS/d May
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 4.5 lb/CFS/d Mar
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 4.5 lb/CFS/d Dec
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 11.5 lb/CFS/d Jan
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 4.5 lb/CFS/d Oct
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 7.7 lb/CFS/d Aug
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 6.4 lb/CFS/d Apr
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 6.4 lb/CFS/d Sep
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 7.7 lb/CFS/d Jul
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 6.4 lb/CFS/d Jun
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 16.3 lb/CFS/d Feb
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 6.4 lb/CFS/d Nov
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 6.4 lb/CFS/d May
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 6.4 lb/CFS/d Mar
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 6.4 lb/CFS/d Dec
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 16.3 lb/CFS/d Jan
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 6.4 lb/CFS/d Oct
001Oxygen, dissolved [DO]DAILY MN >= .8 mg/L all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspended30DA AVG <= 120 mg/L all year
001Solids, total suspendedDAILY MX <= 200 mg/L all year
001Solids, total suspended30DA AVG <= 56045 lb/d all year
001Solids, total suspendedDAILY MX <= 93048 lb/d all year
001Cyanide, total [as CN]30DA AVG <= .027689 mg/L all year
001Cyanide, total [as CN]DAILY MX <= .1047 mg/L all year
001Cyanide, total [as CN]30DA AVG <= 12.93 lb/d all year
001Cyanide, total [as CN]DAILY MX <= 48.88 lb/d all year
001Cadmium, total [as Cd]30DA AVG <= .001 mg/L all year
001Cadmium, total [as Cd]DAILY MX <= .01 mg/L all year
001Cadmium, total [as Cd]30DA AVG <= .646 lb/d all year
001Cadmium, total [as Cd]DAILY MX <= 4.6 lb/d all year
001Copper, total [as Cu]30DA AVG <= .03 mg/L all year
001Copper, total [as Cu]DAILY MX <= .049 mg/L all year
001Copper, total [as Cu]30DA AVG <= 14.1 lb/d all year
001Copper, total [as Cu]DAILY MX <= 22.9 lb/d all year
001Chlorine, total residual30DA AVG <= .1 mg/L all year
001Chlorine, total residualDAILY MX <= .15 mg/L all year
001Chlorine, total residual30DA AVG <= 48 lb/d all year
001Chlorine, total residualDAILY MX <= 68 lb/d all year
001E. coliGEO MEAN <= 126 #/100mL Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX <= 1 N=0;Y=1 all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX <= 1 N=0;Y=1 all year
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 113 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 276 mg/L all year
001BOD, carbonaceous [5-day, 20 C][streamflow]30DA AVG <= 20 lb/CFS/d all year
001BOD, carbonaceous [5-day, 20 C][streamflow]DAILY MX <= 20 lb/CFS/d all year
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.3 lb/CFS/d Jul
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 2 lb/CFS/d Dec
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.8 lb/CFS/d May
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.9 lb/CFS/d Jan
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.9 lb/CFS/d Apr
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.3 lb/CFS/d Aug
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 2 lb/CFS/d Oct
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.1 lb/CFS/d Jun
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.9 lb/CFS/d Mar
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.3 lb/CFS/d Sep
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.8 lb/CFS/d Nov
004Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.8 lb/CFS/d Feb
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 2.2 lb/CFS/d Jul
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 2 lb/CFS/d Dec
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.9 lb/CFS/d May
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.9 lb/CFS/d Jan
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.9 lb/CFS/d Apr
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 2.1 lb/CFS/d Aug
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 2 lb/CFS/d Oct
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.8 lb/CFS/d Jun
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.9 lb/CFS/d Mar
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 2.1 lb/CFS/d Sep
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.8 lb/CFS/d Nov
004Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.8 lb/CFS/d Feb
004Oxygen, dissolved [DO]DAILY MN >= .8 mg/L all year
004pHDAILY MN >= 6.1 SU all year
004pHDAILY MX <= 9 SU all year
004Solids, total suspended30DA AVG <= 120 mg/L all year
004Solids, total suspendedDAILY MX <= 200 mg/L all year
004Solids, total suspended30DA AVG <= 56045 lb/d all year
004Solids, total suspendedDAILY MX <= 93048 lb/d all year
004Cyanide, total [as CN]30DA AVG <= .012 mg/L all year
004Cyanide, total [as CN]DAILY MX <= .02458 mg/L all year
004Cyanide, total [as CN]30DA AVG <= 5.56 lb/d all year
004Cyanide, total [as CN]DAILY MX <= 11.4 lb/d all year
004Cadmium, total [as Cd]30DA AVG <= .001 mg/L all year
004Cadmium, total [as Cd]DAILY MX <= .002 mg/L all year
004Cadmium, total [as Cd]30DA AVG <= .29 lb/d all year
004Cadmium, total [as Cd]DAILY MX <= 1.11 lb/d all year
004Copper, total [as Cu]30DA AVG <= .015 mg/L all year
004Copper, total [as Cu]DAILY MX <= .015 mg/L all year
004Copper, total [as Cu]30DA AVG <= 7.05 lb/d all year
004Copper, total [as Cu]DAILY MX <= 7.05 lb/d all year
004Zinc, total [as Zn]30DA AVG <= .133 mg/L all year
004Zinc, total [as Zn]DAILY MX <= .133 mg/L all year
004Zinc, total [as Zn]30DA AVG <= 62 lb/d all year
004Zinc, total [as Zn]DAILY MX <= 62 lb/d all year
004Selenium, total [as Se]30DA AVG <= .011 mg/L all year
004Selenium, total [as Se]DAILY MX <= .02157 mg/L all year
004Selenium, total [as Se]30DA AVG <= 5.34 lb/d all year
004Selenium, total [as Se]DAILY MX <= 10 lb/d all year
004Chlorine, total residual30DA AVG <= .222 mg/L all year
004Chlorine, total residualDAILY MX <= .32 mg/L all year
004Chlorine, total residual30DA AVG <= 103.7 lb/d all year
004Chlorine, total residualDAILY MX <= 150 lb/d all year
004E. coliGEO MEAN <= 126 #/100mL Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
004BOD, carbonaceous [5 day, 20 C]30DA AVG <= 113 mg/L all year
004BOD, carbonaceous [5 day, 20 C]DAILY MX <= 276 mg/L all year
004BOD, carbonaceous [5-day, 20 C][streamflow]30DA AVG <= 20 lb/CFS/d all year
004BOD, carbonaceous [5-day, 20 C][streamflow]DAILY MX <= 20 lb/CFS/d all year
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1 lb/CFS/d Sep
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.3 lb/CFS/d Feb
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.1 lb/CFS/d May
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.1 lb/CFS/d Aug
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1 lb/CFS/d Jun
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1 lb/CFS/d Nov
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.2 lb/CFS/d Mar
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1 lb/CFS/d Dec
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1 lb/CFS/d Oct
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1 lb/CFS/d Apr
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.2 lb/CFS/d Jul
117Nitrogen, ammonia per cfs of streamflow30DA AVG <= 1.2 lb/CFS/d Jan
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1 lb/CFS/d Sep
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.3 lb/CFS/d Feb
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.1 lb/CFS/d May
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.1 lb/CFS/d Aug
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1 lb/CFS/d Jun
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1 lb/CFS/d Nov
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.2 lb/CFS/d Mar
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1 lb/CFS/d Dec
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1 lb/CFS/d Oct
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1 lb/CFS/d Apr
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.2 lb/CFS/d Jul
117Nitrogen, ammonia per cfs of streamflowDAILY MX <= 1.2 lb/CFS/d Jan
117pHDAILY MN >= 6 SU all year
117pHDAILY MX <= 9 SU all year
117Solids, total suspended30DA AVG <= 120 mg/L all year
117Solids, total suspendedDAILY MX <= 200 mg/L all year
117Solids, total suspended30DA AVG <= 56045 lb/d all year
117Solids, total suspendedDAILY MX <= 93048 lb/d all year
117Chlorine, total residual30DA AVG <= .1 mg/L all year
117Chlorine, total residualDAILY MX <= .15 mg/L all year
117Chlorine, total residual30DA AVG <= 48 lb/d all year
117Chlorine, total residualDAILY MX <= 68 lb/d all year
117E. coliGEO MEAN <= 126 #/100mL Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
117BOD, carbonaceous [5 day, 20 C]30DA AVG <= 113 mg/L all year
117BOD, carbonaceous [5 day, 20 C]DAILY MX <= 276 mg/L 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