CALDWELL, CITY OF

NPDES permit ID0021504 · Major POTW · administratively continued, expires 2021-10-31 · 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 2021-10-31 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

1values over a limit
2required values missing, on 1 form(s)
0of 66 forms filed late

Last period with anything received: 2026-08-31. Most often over: E. coli, MTEC-MF (1).

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among ID permits in EPA's filings — check your permit).

Limits in force (256)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMX DA AV report only all year
001Temperature, water deg. centigradeMX 7D AV report only all year
001Temperature, water deg. centigradeINST MAX report only all year
001ConductivityMO AVG report only all year
001ConductivityDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 2127 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 3190 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 2125 lb/d all year
001Solids, total suspendedWKLY AVG <= 3183 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.55 mg/L Apr, May, Jun
001Nitrogen, ammonia total [as N]MO AVG <= 2.7 mg/L Jan, Feb, Mar, Jul, Aug, Sep, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 5.83 mg/L Apr, May, Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 8.93 mg/L Jan, Feb, Mar, Jul, Aug, Sep, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 110 lb/d Apr, May, Jun
001Nitrogen, ammonia total [as N]MO AVG <= 191 lb/d Jan, Feb, Mar, Jul, Aug, Sep, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 413 lb/d Apr, May, Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 633 lb/d Jan, Feb, Mar, Jul, Aug, Sep, Oct, Nov, Dec
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MX WK AV report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MX WK AV report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]WKLY AVG report only all year
001Phosphorus, total [as P]ANNL AVG <= 3 mg/L all year
001Phosphorus, total [as P]ANNL AVG <= 213 lb/d all year
001Phosphate, ortho, dissolved [as P]MO AVG report only all year
001Phosphate, ortho, dissolved [as P]DAILY MX report only all year
001Carbon, dissolved organic [as C]MO AVG report only all year
001Carbon, dissolved organic [as C]DAILY MX report only all year
001Cyanide, weak acid, dissociableMO AVG report only all year
001Cyanide, weak acid, dissociableMO AVG report only all year
001Cyanide, weak acid, dissociableINST MAX report only all year
001Cyanide, weak acid, dissociableINST MAX report only all year
001Cyanide, weak acid, dissociableMO AVG report only all year
001Cyanide, weak acid, dissociableMO AVG report only all year
001Cyanide, weak acid, dissociableINST MAX report only all year
001Cyanide, weak acid, dissociableINST MAX report only all year
001Hardness, total [as CaCO3]MO AVG report only all year
001Hardness, total [as CaCO3]DAILY MX report only all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableINST MAX report only all year
001Arsenic, total recoverableINST MAX report only all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableINST MAX report only all year
001Arsenic, total recoverableINST MAX report only all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableINST MAX report only all year
001Selenium, total recoverableINST MAX report only all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableINST MAX report only all year
001Selenium, total recoverableINST MAX report only all year
001Nickel, total recoverableMO AVG report only all year
001Nickel, total recoverableMO AV MN report only all year
001Nickel, total recoverableINST MAX report only all year
001Nickel, total recoverableINST MAX report only all year
001Nickel, total recoverableMO AVG report only all year
001Nickel, total recoverableMO AVG report only all year
001Nickel, total recoverableINST MAX report only all year
001Nickel, total recoverableINST MAX report only all year
001Silver total recoverableMO AVG report only all year
001Silver total recoverableMO AVG report only all year
001Silver total recoverableINST MAX report only all year
001Silver total recoverableINST MAX report only all year
001Silver total recoverableMO AVG report only all year
001Silver total recoverableMO AVG report only all year
001Silver total recoverableINST MAX report only all year
001Silver total recoverableINST MAX report only all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableINST MAX report only all year
001Zinc, total recoverableINST MAX report only all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableINST MAX report only all year
001Zinc, total recoverableINST MAX report only all year
001Cadmium, total recoverableMO AVG report only all year
001Cadmium, total recoverableMO AVG report only all year
001Cadmium, total recoverableINST MAX report only all year
001Cadmium, total recoverableINST MAX report only all year
001Cadmium, total recoverableMO AVG report only all year
001Cadmium, total recoverableMO AVG report only all year
001Cadmium, total recoverableINST MAX report only all year
001Cadmium, total recoverableINST MAX report only all year
001Lead, total recoverableMO AVG report only all year
001Lead, total recoverableMO AVG report only all year
001Lead, total recoverableINST MAX report only all year
001Lead, total recoverableINST MAX report only all year
001Lead, total recoverableMO AVG report only all year
001Lead, total recoverableMO AVG report only all year
001Lead, total recoverableINST MAX report only all year
001Lead, total recoverableINST MAX report only all year
001Chromium, total recoverableMO AVG report only all year
001Chromium, total recoverableMO AVG report only all year
001Chromium, total recoverableINST MAX report only all year
001Chromium, total recoverableINST MAX report only all year
001Chromium, total recoverableMO AVG report only all year
001Chromium, total recoverableMO AVG report only all year
001Chromium, total recoverableINST MAX report only all year
001Chromium, total recoverableINST MAX report only all year
001Copper, total recoverableMO AVG report only all year
001Copper, total recoverableMO AVG report only all year
001Copper, total recoverableINST MAX report only all year
001Copper, total recoverableINST MAX report only all year
001Copper, total recoverableMO AVG <= 19.8 ug/L Apr, May, Jun
001Copper, total recoverableMO AVG report only Jan, Feb, Mar, Jul, Aug, Sep, Oct, Nov, Dec
001Copper, total recoverableDAILY MX <= 39.6 ug/L Apr, May, Jun
001Copper, total recoverableDAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep, Oct, Nov, Dec
001Copper, total recoverableMO AVG <= 1.4 lb/d Apr, May, Jun
001Copper, total recoverableDAILY MX <= 2.81 lb/d Apr, May, Jun
001Molybdenum, total recoverableMO AVG report only all year
001Molybdenum, total recoverableMO AV MN report only all year
001Molybdenum, total recoverableINST MAX report only all year
001Molybdenum, total recoverableINST MAX report only all year
001Molybdenum, total recoverableMO AVG report only all year
001Molybdenum, total recoverableMO AVG report only all year
001Molybdenum, total recoverableINST MAX report only all year
001Molybdenum, total recoverableINST MAX report only all year
001Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
001Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
001Chromium, hexavalent dissolved [as Cr]INST MAX report only all year
001Chromium, hexavalent dissolved [as Cr]INST MAX report only all year
001Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
001Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
001Chromium, hexavalent dissolved [as Cr]INST MAX report only all year
001Chromium, hexavalent dissolved [as Cr]INST MAX report only all year
001E. coli, MTEC-MFMO GEOMN <= 126 #/100mL all year
001E. coli, MTEC-MFINST MAX <= 406 #/100mL all year
001Floating solids, waste or visible foam-visualMO MAX <= 0 N=0;Y=1 all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Mercury, total recoverableMO AVG report only all year
001Mercury, total recoverableMO AVG report only all year
001Mercury, total recoverableINST MAX report only all year
001Mercury, total recoverableINST MAX report only all year
001Mercury, total recoverableMO AVG report only all year
001Mercury, total recoverableDAILY MX report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Toxicity, ChronicMO AVG <= 2.58 toxic Jan, Feb, Mar, Jul, Aug, Sep, Oct, Nov, Dec
001Toxicity, ChronicMO AVG <= 1.61 toxic Apr, May, Jun
001Toxicity, ChronicDAILY MX <= 7.68 toxic Jan, Feb, Mar, Jul, Aug, Sep, Oct, Nov, Dec
001Toxicity, ChronicDAILY MX <= 4.81 toxic Apr, May, Jun
RECTemperature, water deg. centigradeMO AVG report only all year
RECTemperature, water deg. centigradeINST MAX report only all year
RECTemperature, water deg. centigradeMO AVG report only all year
RECTemperature, water deg. centigradeINST MAX report only all year
RECStream flow, instantaneousINST MIN report only all year
RECTurbidityINST MAX report only all year
RECTurbidityINST MAX report only all year
RECConductivityINST MAX report only all year
RECOxygen, dissolved [DO]INST MIN report only all year
RECBOD, 5-day, 20 deg. CINST MAX report only all year
RECpHINST MIN report only all year
RECpHINST MAX report only all year
RECpHINST MIN report only all year
RECpHINST MAX report only all year
RECNitrogen, total [as N]INST MAX report only all year
RECNitrogen, total [as N]INST MAX report only all year
RECPhosphorus, total [as P]INST MAX report only all year
RECPhosphorus, total [as P]INST MAX report only all year
RECCarbon, dissolved organic [as C]INST MAX report only all year
RECHardness, total [as CaCO3]INST MAX report only all year
RECArsenic, total recoverableINST MAX report only all year
RECCadmium, dissolved [as Cd]INST MAX report only all year
RECChromium, dissolved [as Cr]INST MAX report only all year
RECCopper, dissolved [as Cu]INST MAX report only all year
RECLead, dissolved [as Pb]INST MAX report only all year
RECNickel, dissolved [as Ni]INST MAX report only all year
RECSilver, dissolved [as Ag]INST MAX report only all year
RECZinc, dissolved [as Zn]INST MAX report only all year
RECChromium, hexavalent dissolved [as Cr]INST MAX report only all year
RECChlorophyll AINST MAX report only all year
RECChlorophyll AINST MAX report only all year
RECMercury, total recoverableINST MAX report only all year
SLSChromium, total dry weight [as Cr]INST MAX report only all year
SLSChromium, total dry weight [as Cr]INST MAX report only all year
SLSChromium, total dry weight [as Cr]INST MAX report only all year
SLSLead, total dry weight [as Pb]INST MAX report only all year
SLSLead, total dry weight [as Pb]INST MAX report only all year
SLSLead, total dry weight [as Pb]INST MAX report only all year
SLSSelenium, sludge, total, dry weight [as Se]INST MAX report only all year
SLSSelenium, sludge, total, dry weight [as Se]INST MAX report only all year
SLSSelenium, sludge, total, dry weight [as Se]INST MAX report only all year
SLSArsenic total, dry weight, sludgeINST MAX report only all year
SLSArsenic total, dry weight, sludgeINST MAX report only all year
SLSArsenic total, dry weight, sludgeINST MAX report only all year
SLSSolids, total, sludge, percentINST MAX report only all year
SLSSolids, total, sludge, percentINST MAX report only all year
SLSSolids, total, sludge, percentINST MAX report only all year
SLSMolybdenum, sludge, total, dry weight [as Mo]INST MAX report only all year
SLSMolybdenum, sludge, total, dry weight [as Mo]INST MAX report only all year
SLSMolybdenum, sludge, total, dry weight [as Mo]INST MAX report only all year
SLSZinc, sludge, total, dry weight [as Zn]INST MAX report only all year
SLSZinc, sludge, total, dry weight [as Zn]INST MAX report only all year
SLSZinc, sludge, total, dry weight [as Zn]INST MAX report only all year
SLSNickel, sludge, total, dry weight [as Ni]INST MAX report only all year
SLSNickel, sludge, total, dry weight [as Ni]INST MAX report only all year
SLSNickel, sludge, total, dry weight [as Ni]INST MAX report only all year
SLSMercury, sludge, total, dry weight [as Hg]INST MAX report only all year
SLSMercury, sludge, total, dry weight [as Hg]INST MAX report only all year
SLSMercury, sludge, total, dry weight [as Hg]INST MAX report only all year
SLSCopper, sludge, total, dry weight [as Cu]INST MAX report only all year
SLSCopper, sludge, total, dry weight [as Cu]INST MAX report only all year
SLSCopper, sludge, total, dry weight [as Cu]INST MAX report only all year
SLSCadmium, sludge, total, dry weight [as Cd]INST MAX report only all year
SLSCadmium, sludge, total, dry weight [as Cd]INST MAX report only all year
SLSCadmium, sludge, total, dry weight [as Cd]INST MAX report only all year
SLTChromium, total dry weight [as Cr]INST MAX report only all year
SLTChromium, total dry weight [as Cr]INST MAX report only all year
SLTChromium, total dry weight [as Cr]INST MAX report only all year
SLTLead, total dry weight [as Pb]INST MAX report only all year
SLTLead, total dry weight [as Pb]INST MAX report only all year
SLTLead, total dry weight [as Pb]INST MAX report only all year
SLTSelenium, sludge, total, dry weight [as Se]INST MAX report only all year
SLTSelenium, sludge, total, dry weight [as Se]INST MAX report only all year
SLTSelenium, sludge, total, dry weight [as Se]INST MAX report only all year
SLTArsenic total, dry weight, sludgeINST MAX report only all year
SLTArsenic total, dry weight, sludgeINST MAX report only all year
SLTArsenic total, dry weight, sludgeINST MAX report only all year
SLTSolids, total, sludge, percentINST MAX report only all year
SLTSolids, total, sludge, percentINST MAX report only all year
SLTSolids, total, sludge, percentINST MAX report only all year
SLTMolybdenum, sludge, total, dry weight [as Mo]INST MAX report only all year
SLTMolybdenum, sludge, total, dry weight [as Mo]INST MAX report only all year
SLTMolybdenum, sludge, total, dry weight [as Mo]INST MAX report only all year
SLTZinc, sludge, total, dry weight [as Zn]INST MAX report only all year
SLTZinc, sludge, total, dry weight [as Zn]INST MAX report only all year
SLTZinc, sludge, total, dry weight [as Zn]INST MAX report only all year
SLTNickel, sludge, total, dry weight [as Ni]INST MAX report only all year
SLTNickel, sludge, total, dry weight [as Ni]INST MAX report only all year
SLTNickel, sludge, total, dry weight [as Ni]INST MAX report only all year
SLTMercury, sludge, total, dry weight [as Hg]INST MAX report only all year
SLTMercury, sludge, total, dry weight [as Hg]INST MAX report only all year
SLTMercury, sludge, total, dry weight [as Hg]INST MAX report only all year
SLTCopper, sludge, total, dry weight [as Cu]INST MAX report only all year
SLTCopper, sludge, total, dry weight [as Cu]INST MAX report only all year
SLTCopper, sludge, total, dry weight [as Cu]INST MAX report only all year
SLTCadmium, sludge, total, dry weight [as Cd]INST MAX report only all year
SLTCadmium, sludge, total, dry weight [as Cd]INST MAX report only all year
SLTCadmium, sludge, total, dry weight [as Cd]INST MAX report only all year

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