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Plants facing new discharge limits — by state and pollutant

In Iowa, for Iron, total [as Fe]: 12 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between May 1, 2027 and Jul 1, 2031 (44 limits); 0 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 12 · PA 7 · WV 2 · TX 1

By pollutant: all · 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
CEDAR FALLS MUNICIPAL ELECTRIC UTILITYIA0002534IAIndustrial10.4 MGDIron, total [as Fe]30-day average 1 mg/L, newMay 1, 2027under 3 values—
CEDAR FALLS MUNICIPAL ELECTRIC UTILITYIA0002534IAIndustrial10.4 MGDIron, total [as Fe]daily maximum 1 mg/L, newMay 1, 2027under 3 values—
CITY OF RALSTONIA0082392IAIndustrial—Iron, total [as Fe]30-day average 1 mg/L, newMay 1, 2027under 3 values—
CITY OF RALSTONIA0082392IAIndustrial—Iron, total [as Fe]30-day average 0.013 lb/d, newMay 1, 2027under 3 values—
CITY OF RALSTONIA0082392IAIndustrial—Iron, total [as Fe]daily maximum 1 mg/L, newMay 1, 2027under 3 values—
CITY OF RALSTONIA0082392IAIndustrial—Iron, total [as Fe]daily maximum 0.013 lb/d, newMay 1, 2027under 3 values—
CITY OF MAXWELLIA0082961IAIndustrial—Iron, total [as Fe]30-day average 0.0289 lb/d, newAug 1, 2027under 3 values—
CITY OF MAXWELLIA0082961IAIndustrial—Iron, total [as Fe]30-day average 1.39 mg/L, newAug 1, 2027under 3 values—
CITY OF MAXWELLIA0082961IAIndustrial—Iron, total [as Fe]daily maximum 0.0289 lb/d, newAug 1, 2027under 3 values—
CITY OF MAXWELLIA0082961IAIndustrial—Iron, total [as Fe]daily maximum 1.39 mg/L, newAug 1, 2027under 3 values—
CLEAR LAKE FOOD-BANK, INC.IA0081108IAIndustrial—Iron, total [as Fe]30-day average 0.34 lb/d, newJan 1, 2028under 3 values—
CLEAR LAKE FOOD-BANK, INC.IA0081108IAIndustrial—Iron, total [as Fe]30-day average 1 mg/L, newJan 1, 2028under 3 values—
CLEAR LAKE FOOD-BANK, INC.IA0081108IAIndustrial—Iron, total [as Fe]daily maximum 1 mg/L, newJan 1, 2028under 3 values—
CLEAR LAKE FOOD-BANK, INC.IA0081108IAIndustrial—Iron, total [as Fe]daily maximum 0.34 lb/d, newJan 1, 2028under 3 values—
WOODBURY COUNTY BUILDING SERVICESIA0084034IAIndustrial—Iron, total [as Fe]30-day average 1.01 mg/L, newAug 1, 2028under 3 values—
WOODBURY COUNTY BUILDING SERVICESIA0084034IAIndustrial—Iron, total [as Fe]30-day average 6.28 lb/d, newAug 1, 2028under 3 values—
WOODBURY COUNTY BUILDING SERVICESIA0084034IAIndustrial—Iron, total [as Fe]daily maximum 6.28 lb/d, newAug 1, 2028under 3 values—
WOODBURY COUNTY BUILDING SERVICESIA0084034IAIndustrial—Iron, total [as Fe]daily maximum 1.01 mg/L, newAug 1, 2028under 3 values—
QUANTUM PLASTICSIA0072044IAIndustrial—Iron, total [as Fe]30-day average 2.32 lb/d, newSep 1, 2029under 3 values—
QUANTUM PLASTICSIA0072044IAIndustrial—Iron, total [as Fe]30-day average 1 mg/L, newSep 1, 2029under 3 values—
QUANTUM PLASTICSIA0072044IAIndustrial—Iron, total [as Fe]daily maximum 1 mg/L, newSep 1, 2029under 3 values—
QUANTUM PLASTICSIA0072044IAIndustrial—Iron, total [as Fe]daily maximum 2.32 lb/d, newSep 1, 2029under 3 values—
THE UNIVERSITY OF IOWAIA0071919IAIndustrial.329 MGDIron, total [as Fe]30-day average 3.44 mg/L, newJul 1, 2030under 3 values—
THE UNIVERSITY OF IOWAIA0071919IAIndustrial.329 MGDIron, total [as Fe]30-day average 21 lb/d, newJul 1, 2030under 3 values—
THE UNIVERSITY OF IOWAIA0071919IAIndustrial.329 MGDIron, total [as Fe]daily maximum 3.44 mg/L, newJul 1, 2030under 3 values—
THE UNIVERSITY OF IOWAIA0071919IAIndustrial.329 MGDIron, total [as Fe]daily maximum 21 lb/d, newJul 1, 2030under 3 values—
SIOUX VALLEY INVESTMENTS, LLCIA0082121IAIndustrial—Iron, total [as Fe]30-day average 1 mg/L, tighterDec 1, 20300.345 mg/L (11 values)0.345×
SIOUX VALLEY INVESTMENTS, LLCIA0082121IAIndustrial—Iron, total [as Fe]daily maximum 1 mg/L, tighterDec 1, 20300.345 mg/L (11 values)0.345×
BUCKEYE TERMINALS, LLCIA0071234IAIndustrial—Iron, total [as Fe]30-day average 4.427 lb/d, newFeb 1, 2031under 3 values—
BUCKEYE TERMINALS, LLCIA0071234IAIndustrial—Iron, total [as Fe]30-day average 1.395 mg/L, newFeb 1, 2031under 3 values—
BUCKEYE TERMINALS, LLCIA0071234IAIndustrial—Iron, total [as Fe]daily maximum 4.427 lb/d, newFeb 1, 2031under 3 values—
BUCKEYE TERMINALS, LLCIA0071234IAIndustrial—Iron, total [as Fe]daily maximum 1.395 mg/L, newFeb 1, 2031under 3 values—
H.J. HEINZ COMPANY, L.P.IA0001741IAIndustrial—Iron, total [as Fe]30-day average 11.5 lb/d, newMar 1, 2031under 3 values—
H.J. HEINZ COMPANY, L.P.IA0001741IAIndustrial—Iron, total [as Fe]30-day average 1 mg/L, newMar 1, 2031under 3 values—
H.J. HEINZ COMPANY, L.P.IA0001741IAIndustrial—Iron, total [as Fe]daily maximum 11.5 lb/d, newMar 1, 2031under 3 values—
H.J. HEINZ COMPANY, L.P.IA0001741IAIndustrial—Iron, total [as Fe]daily maximum 1 mg/L, newMar 1, 2031under 3 values—
CRYOTECH DEICING TECHNOLOGYIA0003387IAIndustrial—Iron, total [as Fe]30-day average 1.98 mg/L, newApr 1, 2031under 3 values—
CRYOTECH DEICING TECHNOLOGYIA0003387IAIndustrial—Iron, total [as Fe]30-day average 16.02 lb/d, newApr 1, 2031under 3 values—
CRYOTECH DEICING TECHNOLOGYIA0003387IAIndustrial—Iron, total [as Fe]daily maximum 16.02 lb/d, newApr 1, 2031under 3 values—
CRYOTECH DEICING TECHNOLOGYIA0003387IAIndustrial—Iron, total [as Fe]daily maximum 1.98 mg/L, newApr 1, 2031under 3 values—
CITY OF OSCEOLAIA0082953IAIndustrial—Iron, total [as Fe]30-day average 5.179 lb/d, newJul 1, 2031under 3 values—
CITY OF OSCEOLAIA0082953IAIndustrial—Iron, total [as Fe]30-day average 1 mg/L, newJul 1, 2031under 3 values—
CITY OF OSCEOLAIA0082953IAIndustrial—Iron, total [as Fe]daily maximum 5.179 lb/d, newJul 1, 2031under 3 values—
CITY OF OSCEOLAIA0082953IAIndustrial—Iron, total [as Fe]daily maximum 1 mg/L, newJul 1, 2031under 3 values—

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