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Plants facing new discharge limits — by state and pollutant

In Iowa: 204 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Nov 1, 2026 and Aug 1, 2031 (4619 limits); 9 of them reported a median above that limit between Oct 1, 2025 and Sep 30, 2026. EPA's file of Oct 16, 2026.

By state: all · IA 204 · PA 172 · LA 165 · OH 134 · MS 68 · AR 58 · TX 57 · MI 53 · GA 52 · VA 52 · MD 48 · NJ 35 · IN 31 · SC 23 · KS 21 · MN 21 · NY 21 · MO 20 · WV 17 · OR 16 · IL 14 · FL 10 · NE 9 · OK 8 · TN 8 · CO 7 · UT 7 · NM 6 · CA 5 · SD 5 · CT 3 · ID 3 · ME 2 · WI 2 · AL 1 · DC 1 · KY 1 · MT 1 · NH 1 · PR 1 · VT 1 · WA 1

By pollutant: Nitrogen, ammonia total [as N] 90 · E. coli 81 · Chloride [as Cl] 45 · Chlorine, total residual 20 · Iron, total [as Fe] 12 · Copper, total [as Cu] 9 · Cyanide, total [as CN] 6 · Phenols 6 · Sulfate, total [as SO4] 4 · Aluminum, total [as Al] 3 · Oxygen demand, chem. [high level] [COD] 3 · Lead, total [as Pb] 2 · Mercury, total [as Hg] 2 · Nitrogen, nitrate total [as N] 2 · Selenium, total [as Se] 2 · Temperature, water deg. fahrenheit 2 · Thallium, total [as Tl] 2 · Zinc, total [as Zn] 2 · Arsenic, total [as As] 1 · BOD, carbonaceous [5 day, 20 C] 1 · Bromide [as Br] 1 · Cadmium, total [as Cd] 1 · Chromium, hexavalent [as Cr] 1 · Chromium, total [as Cr] 1 · Glyphosate, total 1

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
AJINOMOTO HEALTH & NUTRITION NORTH AMERICA, INC.IA0065692IAIndustrial.0048 MGDChlorine, total residualdaily maximum 0.085 mg/L, tighterJan 1, 20270.11 mg/L (11 values)1.29×
CITY OF PEOSTAIA0075507IASewage plant.081 MGDChloride [as Cl]30-day average 389 mg/L, newFeb 1, 2027403 mg/L (11 values)1.04×
CITY OF KALONAIA0059196IASewage plant1.77 MGDE. colidaily maximum 126 #/100mL (Mar–Nov), newApr 1, 2027201.5 #/100mL (4 values)1.6×
GERDAUIA0061972IAIndustrial—Copper, total [as Cu]daily maximum 0.0303 mg/L, tighterFeb 1, 20280.038 mg/L (11 values)1.25×
JOHN DEERE DUBUQUE WORKSIA0000051IAIndustrial, major.36 MGDChlorine, total residualdaily maximum 0.024 mg/L, tighterMar 1, 20280.05 mg/L (11 values)2.08×
JOHN DEERE DUBUQUE WORKSIA0000051IAIndustrial, major.36 MGDChlorine, total residualdaily maximum 0.024 mg/L, tighterMar 1, 20280.04 mg/L (11 values)1.67×
JOHN DEERE DUBUQUE WORKSIA0000051IAIndustrial, major.36 MGDChlorine, total residual30-day average 0.024 mg/L, tighterMar 1, 20280.0275 mg/L (11 values)1.15×
JOHN DEERE DUBUQUE WORKSIA0000051IAIndustrial, major.36 MGDChlorine, total residualdaily maximum 0.015 lb/d, tighterMar 1, 20280.01534 lb/d (11 values)1.02×
CITY OF DANBURYIA0035246IASewage plant.255 MGDChloride [as Cl]30-day average 749 mg/L, tighterJun 1, 20281139 mg/L (12 values)1.52×
CITY OF DANBURYIA0035246IASewage plant.255 MGDChloride [as Cl]daily maximum 749 mg/L, tighterJun 1, 20281139 mg/L (12 values)1.52×
ROQUETTE AMERICA, INC.IA0000256IAIndustrial, major7.34 MGDChlorine, total residualdaily maximum 2.84 lb/d, tighterJul 1, 20295.009 lb/d (11 values)1.76×
ROQUETTE AMERICA, INC.IA0000256IAIndustrial, major7.34 MGDChlorine, total residualdaily maximum 0.097 mg/L, tighterJul 1, 20290.14 mg/L (11 values)1.44×
ROQUETTE AMERICA, INC.IA0000256IAIndustrial, major7.34 MGDChlorine, total residualdaily maximum 0.097 mg/L, tighterJul 1, 20290.13 mg/L (11 values)1.34×
SIOUX VALLEY INVESTMENTS, LLCIA0082121IAIndustrial—Chlorine, total residualdaily maximum 0.019 mg/L, tighterDec 1, 20300.03 mg/L (10 values)1.58×
H.J. HEINZ COMPANY, L.P.IA0001741IAIndustrial—Chlorine, total residualdaily maximum 0.019 mg/L, tighterMar 1, 20310.085 mg/L (12 values)4.47×
H.J. HEINZ COMPANY, L.P.IA0001741IAIndustrial—Chlorine, total residualdaily maximum 0.219 lb/d, tighterMar 1, 20310.6838 lb/d (11 values)3.12×
H.J. HEINZ COMPANY, L.P.IA0001741IAIndustrial—Chlorine, total residual30-day average 0.011 mg/L, tighterMar 1, 20310.0293 mg/L (12 values)2.66×
H.J. HEINZ COMPANY, L.P.IA0001741IAIndustrial—Chlorine, total residual30-day average 0.127 lb/d, tighterMar 1, 20310.189 lb/d (11 values)1.49×
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDE. coligeometric mean 134 #/100mL (Mar–Nov), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 4.8 lb/d (Nov), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 2.3 mg/L (Nov), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 7.1 lb/d (Jan), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 3.4 mg/L (Jan), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 4 mg/L (Feb), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 8.2 lb/d (Feb), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 7.1 lb/d (Mar), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 3.4 mg/L (Mar), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 1.7 mg/L (May), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 3.6 lb/d (May), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 2.7 lb/d (Jun), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 1.3 mg/L (Jun), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 1 mg/L (Jul), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 2.1 lb/d (Jul), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 2.2 lb/d (Sep), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 1.1 mg/L (Sep), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 3.2 lb/d (Apr), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 1.5 mg/L (Apr), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 1.6 mg/L (Oct), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 3.2 lb/d (Oct), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 2 lb/d (Aug), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 1 mg/L (Aug), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 2.5 mg/L (Dec), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]30-day average 5.2 lb/d (Dec), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Nov), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 5.5 lb/d (Nov), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 19.9 mg/L (Jan), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 41.5 lb/d (Jan), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 17.5 lb/d (Feb), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 8.4 mg/L (Feb), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 8.1 lb/d (Mar), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 3.9 mg/L (Mar), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 3.2 mg/L (May), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 6.7 lb/d (May), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 3.2 mg/L (Jun), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 6.7 lb/d (Jun), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 3.2 mg/L (Jul), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 6.7 lb/d (Jul), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Sep), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 5.5 lb/d (Sep), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 9.8 lb/d (Apr), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 4.7 mg/L (Apr), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 5.5 lb/d (Oct), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Oct), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 5.5 lb/d (Aug), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Aug), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 3.9 mg/L (Dec), newNov 1, 2026under 3 values—
CITY OF RICKARDSVILLEIA0066311IASewage plant.0645 MGDNitrogen, ammonia total [as N]daily maximum 8.1 lb/d (Dec), newNov 1, 2026under 3 values—
CITY OF VINCENTIA0032930IASewage plant.048 MGDE. coligeometric mean 630 #/100mL (Mar–Nov), newNov 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Chloride [as Cl]30-day average 3289 lb/d, newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Chloride [as Cl]30-day average 394 mg/L, newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Chloride [as Cl]daily maximum 5253 lb/d, newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Chloride [as Cl]daily maximum 630 mg/L, newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—E. coligeometric mean 630 #/100mL (Mar–Nov), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 22 lb/d (Dec), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.6 mg/L (Dec), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 33 lb/d (Feb), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 4 mg/L (Feb), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 28.4 lb/d (Mar), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 3.4 mg/L (Mar), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.9 mg/L (Apr), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 15.8 lb/d (Apr), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.2 mg/L (May), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 18 lb/d (May), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.6 mg/L (Jun), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 13.6 lb/d (Jun), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 1 mg/L (Aug), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 8 lb/d (Aug), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.7 mg/L (Oct), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 13.8 lb/d (Oct), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 20.6 lb/d (Nov), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.5 mg/L (Nov), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 8.4 lb/d (Jul), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 1 mg/L (Jul), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 8.8 lb/d (Sep), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.1 mg/L (Sep), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 28.4 lb/d (Jan), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]30-day average 3.4 mg/L (Jan), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.9 mg/L (Dec), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 32.5 lb/d (Dec), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 70.1 lb/d (Feb), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 8.4 mg/L (Feb), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.9 mg/L (Mar), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 32.4 lb/d (Mar), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 4.7 mg/L (Apr), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 39.5 lb/d (Apr), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 26.9 lb/d (May), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.2 mg/L (May), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.2 mg/L (Jun), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 26.9 lb/d (Jun), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 22.1 lb/d (Aug), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Aug), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 22.2 lb/d (Oct), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Oct), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 22.2 lb/d (Nov), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Nov), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 26.7 lb/d (Jul), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.2 mg/L (Jul), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Sep), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 22.1 lb/d (Sep), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 19.9 mg/L (Jan), newDec 1, 2026under 3 values—
CITY OF TEMPLETONIA0033782IASewage plant—Nitrogen, ammonia total [as N]daily maximum 165.9 lb/d (Jan), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—E. coligeometric mean 630 #/100mL (Mar–Nov), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 7.2 lb/d (Dec), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 3 mg/L (Dec), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 4.2 mg/L (Jan), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 9.9 lb/d (Jan), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 4 mg/L (Mar), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 9.4 lb/d (Mar), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.9 mg/L (Apr), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 4.4 lb/d (Apr), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.2 mg/L (Jul), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.9 lb/d (Jul), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.3 mg/L (Sep), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 3.1 lb/d (Sep), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 4.5 lb/d (Oct), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.9 mg/L (Oct), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 6.4 lb/d (Nov), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.7 mg/L (Nov), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 4.8 mg/L (Feb), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 11.5 lb/d (Feb), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 3.8 lb/d (Jun), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.6 mg/L (Jun), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 5.1 lb/d (May), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.1 mg/L (May), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.8 lb/d (Aug), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.2 mg/L (Aug), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 9.4 lb/d (Dec), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.9 mg/L (Dec), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 21.1 lb/d (Jan), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 8.9 mg/L (Jan), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 9.4 lb/d (Mar), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 4 mg/L (Mar), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 11.3 lb/d (Apr), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 4.8 mg/L (Apr), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 7.8 lb/d (Jul), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.3 mg/L (Jul), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Sep), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 6.4 lb/d (Sep), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 6.4 lb/d (Oct), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Oct), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Nov), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 6.4 lb/d (Nov), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 8.5 mg/L (Feb), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 20.2 lb/d (Feb), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.3 mg/L (Jun), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 7.8 lb/d (Jun), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.3 mg/L (May), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 7.8 lb/d (May), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Aug), newDec 1, 2026under 3 values—
CITY OF THORIA0058581IASewage plant—Nitrogen, ammonia total [as N]daily maximum 6.5 lb/d (Aug), newDec 1, 2026under 3 values—
NORTH UNION COMMUNITY SCHOOL DISTRICTIA0078115IAIndustrial.0055 MGDNitrogen, nitrate total [as N]30-day average 9.5 mg/L, newDec 1, 2026under 3 values—
NORTH UNION COMMUNITY SCHOOL DISTRICTIA0078115IAIndustrial.0055 MGDNitrogen, nitrate total [as N]daily maximum 9.5 mg/L, newDec 1, 2026under 3 values—
AJINOMOTO HEALTH & NUTRITION NORTH AMERICA, INC.IA0065692IAIndustrial.0048 MGDChlorine, total residual30-day average 0.085 mg/L, tighterJan 1, 20270.07193 mg/L (11 values)0.846×
AJINOMOTO HEALTH & NUTRITION NORTH AMERICA, INC.IA0065692IAIndustrial.0048 MGDChlorine, total residualdaily maximum 1.36 lb/d, tighterJan 1, 20270.961 lb/d (11 values)0.707×
AJINOMOTO HEALTH & NUTRITION NORTH AMERICA, INC.IA0065692IAIndustrial.0048 MGDChlorine, total residual30-day average 1.36 lb/d, tighterJan 1, 20270.6269 lb/d (11 values)0.461×
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 9.9 lb/d (Mar), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 3.4 mg/L (Mar), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 4.4 lb/d (Apr), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 1.5 mg/L (Apr), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 3.8 lb/d (Jun), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 2.9 lb/d (Jul), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 1 mg/L (Jul), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 4.5 lb/d (Oct), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 1.6 mg/L (Oct), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 1.1 mg/L (Sep), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 3.1 lb/d (Sep), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 2.8 lb/d (Aug), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 2.3 mg/L (Nov), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 6.8 lb/d (Nov), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 1.7 mg/L (May), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 5.1 lb/d (May), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 2.5 mg/L (Dec), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 7.2 lb/d (Dec), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 9.9 lb/d (Jan), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 3.4 mg/L (Jan), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 11.5 lb/d (Feb), tighterJan 1, 2027under 3 values—
CITY OF BOYDENIA0042838IASewage plant.45 MGDNitrogen, ammonia total [as N]30-day average 4 mg/L (Feb), tighterJan 1, 2027under 3 values—
CITY OF NEVADAIA0031704IASewage plant, major6.218 MGDChloride [as Cl]30-day average 12025 lb/d, newJan 1, 2027under 3 values—
CITY OF NEVADAIA0031704IASewage plant, major6.218 MGDChloride [as Cl]30-day average 389 mg/L, newJan 1, 2027under 3 values—
CITY OF NEVADAIA0031704IASewage plant, major6.218 MGDChloride [as Cl]daily maximum 19458 lb/d, newJan 1, 2027under 3 values—
CITY OF NEVADAIA0031704IASewage plant, major6.218 MGDChloride [as Cl]daily maximum 629 mg/L, newJan 1, 2027under 3 values—
CITY OF PEOSTAIA0075507IASewage plant.081 MGDChloride [as Cl]daily maximum 629 mg/L, newFeb 1, 2027403 mg/L (11 values)0.641×
CITY OF PEOSTAIA0075507IASewage plant.081 MGDChloride [as Cl]30-day average 1433 lb/d, newFeb 1, 2027702.4 lb/d (11 values)0.49×
CITY OF PEOSTAIA0075507IASewage plant.081 MGDChloride [as Cl]daily maximum 2318 lb/d, newFeb 1, 2027702.4 lb/d (11 values)0.303×
CITY OF HUXLEYIA0083518IASewage plant2.8 MGDChloride [as Cl]30-day average 402 mg/L, newFeb 1, 202778.4 mg/L (11 values)0.195×
CITY OF HUXLEYIA0083518IASewage plant2.8 MGDChloride [as Cl]30-day average 2803 lb/d, newFeb 1, 2027367 lb/d (11 values)0.131×
CITY OF HUXLEYIA0083518IASewage plant2.8 MGDChloride [as Cl]daily maximum 631 mg/L, newFeb 1, 202778.4 mg/L (11 values)0.124×
CITY OF HUXLEYIA0083518IASewage plant2.8 MGDChloride [as Cl]daily maximum 4466 lb/d, newFeb 1, 2027367 lb/d (11 values)0.0822×
CITY OF HAMPTONIA0036471IASewage plant, major.9 MGDCopper, total [as Cu]30-day average 0.1956 lb/d, newFeb 1, 2027under 3 values—
CITY OF HAMPTONIA0036471IASewage plant, major.9 MGDCopper, total [as Cu]30-day average 0.01726 mg/L, newFeb 1, 2027under 3 values—
CITY OF HAMPTONIA0036471IASewage plant, major.9 MGDCopper, total [as Cu]daily maximum 0.02696 mg/L, newFeb 1, 2027under 3 values—
CITY OF HAMPTONIA0036471IASewage plant, major.9 MGDCopper, total [as Cu]daily maximum 0.3086 lb/d, newFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—E. coligeometric mean 142 #/100mL (Mar–Nov), newFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 4 mg/L (Feb), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 5.7 lb/d (Feb), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.5 mg/L (Apr), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.2 lb/d (Apr), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.3 mg/L (Jun), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.9 lb/d (Jun), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.6 mg/L (Oct), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.2 lb/d (Oct), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 4.9 lb/d (Jan), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 3.4 mg/L (Jan), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 1 mg/L (Jul), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.5 lb/d (Jul), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 4.9 lb/d (Mar), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 3.4 mg/L (Mar), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.4 lb/d (Aug), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.1 mg/L (Sep), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.5 lb/d (Sep), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 3.3 lb/d (Nov), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.3 mg/L (Nov), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 3.5 lb/d (Dec), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.5 mg/L (Dec), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 2.5 lb/d (May), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]30-day average 1.8 mg/L (May), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 8.4 mg/L (Feb), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 12 lb/d (Feb), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 6.8 lb/d (Apr), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 4.7 mg/L (Apr), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.2 mg/L (Jun), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 4.6 lb/d (Jun), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.8 lb/d (Oct), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Oct), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 4.6 lb/d (Jul), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.2 mg/L (Jul), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 5.6 lb/d (Mar), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.9 mg/L (Mar), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Aug), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.8 lb/d (Aug), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Sep), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.8 lb/d (Sep), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Nov), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.8 lb/d (Nov), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 5.6 lb/d (Dec), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.9 mg/L (Dec), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 4.6 lb/d (May), tighterFeb 1, 2027under 3 values—
MAHASKA RURAL WATER SYSTEMS, INCIA0072311IASewage plant—Nitrogen, ammonia total [as N]daily maximum 3.2 mg/L (May), tighterFeb 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDChloride [as Cl]30-day average 389 mg/L, newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDChloride [as Cl]30-day average 4149 lb/d, newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDChloride [as Cl]daily maximum 629 mg/L, newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDChloride [as Cl]daily maximum 6713 lb/d, newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDE. coligeometric mean 126 #/100mL (Mar–Nov), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 18.7 lb/d (May), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 1.8 mg/L (May), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 14.1 lb/d (Jun), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 1.3 mg/L (Jun), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 1 mg/L (Jul), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 10.9 lb/d (Jul), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 1 mg/L (Aug), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 10.3 lb/d (Aug), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 1.1 mg/L (Sep), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 11.4 lb/d (Sep), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 1.6 mg/L (Oct), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 16.7 lb/d (Oct), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 3.4 mg/L (Jan), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 36.5 lb/d (Jan), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 36.5 lb/d (Mar), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 3.4 mg/L (Mar), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 2.5 mg/L (Dec), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 26.5 lb/d (Dec), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 4 mg/L (Feb), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 42.3 lb/d (Feb), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 2.3 mg/L (Nov), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 24.9 lb/d (Nov), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 16.4 lb/d (Apr), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]30-day average 1.5 mg/L (Apr), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 3.2 mg/L (May), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 34.5 lb/d (May), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 34.6 lb/d (Jun), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 3.2 mg/L (Jun), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 34.7 lb/d (Jul), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 3.3 mg/L (Jul), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Aug), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 28.7 lb/d (Aug), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 28.6 lb/d (Sep), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Sep), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 2.7 mg/L (Oct), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 28.5 lb/d (Oct), newMar 1, 2027under 3 values—
CITY OF FONDAIA0046671IASewage plant.379 MGDNitrogen, ammonia total [as N]daily maximum 19.9 mg/L (Jan), newMar 1, 2027under 3 values—

The 300 soonest limits are listed, plants already above them first; all 4619 are in the JSON at /dmr/data/upcoming.json.

Each limit is one EPA's ICIS-NPDES file holds on the permit's current version with a begin date after today, enforceable and numeric, either on a parameter the outfall was never limited on (new) or lower than the limit in force (tighter). Today's median is the plant's own reported values for the same outfall, statistic and unit between Oct 1, 2025 and Sep 30, 2026, with how many; none is shown where most were below a detection limit. Read the permit before relying on a value.

Sell to these plants? The list for your states every week, with every plant over a limit on your pollutant, as a spreadsheet, by API and by email when a new one appears: ask for the plant list, or write to info@passage-data.com. What a seller gets.

For programs and AI agents: a state's permits with these limits as JSON at /api/v1/permits?state=IA&upcoming=true, narrowed with &facility_type=potw or &min_flow_mgd=1; the whole list at /dmr/data/upcoming.json; or add https://passage-data.com/mcp as a remote MCP server (tool list_permits). Free, no key. llms.txt

From EPA's ECHO data, not the permit document itself: your permit is the final word. All states