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Plants facing new discharge limits — by state and pollutant

In Indiana, for Selenium, total recoverable: 5 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jun 1, 2028 and Oct 1, 2029 (13 limits); 4 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 · OH 8 · IN 5 · MO 1 · SD 1 · WV 1

By pollutant: all · Toxicity [acute], Ceriodaphnia dubia 8 · Toxicity [acute], Pimephales promelas [Fathead Minnow] 8 · Toxicity [chronic], Ceriodaphnia dubia 8 · Toxicity [chronic], Pimephales promelas [Fathead Minnow] 7 · Nitrogen, ammonia total [as N] 6 · Phosphorus, total [as P] 6 · Selenium, total recoverable 5 · Zinc, total recoverable 5 · Cyanide, free [as free] 4 · Lead, total recoverable 3 · Cadmium, total recoverable 2 · Chloride [as Cl] 2 · Nickel, total recoverable 2 · Silver total recoverable 2 · Solids, total suspended 2 · Arsenic, total recoverable 1 · BOD, carbonaceous [5 day, 20 C] 1 · Boron, total recoverable 1 · Bromide [as Br] 1 · Copper, total recoverable 1 · Cyanide, total recoverable 1 · E. coli, colony forming units [CFU] 1 · Fluoride, total [as F] 1 · Manganese, total recoverable 1 · Mercury, total recoverable 1

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDSelenium, total recoverablemonthly average 0.0031 mg/L, tighterJun 1, 20280.0065 mg/L (11 values)2.1×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDSelenium, total recoverablemonthly average 0.0031 mg/L, tighterJun 1, 20280.0045 mg/L (11 values)1.45×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDSelenium, total recoverabledaily maximum 0.0075 mg/L, tighterJun 1, 20280.01 mg/L (11 values)1.33×
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Selenium, total recoverabledaily maximum 10 ug/L, newJan 1, 2029210 ug/L (11 values)21×
INDIANAPOLIS BELMONT & SOUTHPORT AWTPIN0023183INSewage plant, major125 MGDSelenium, total recoverablemonthly average 0.0031 mg/L, newMay 1, 20290.0049 mg/L (11 values)1.58×
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—Selenium, total recoverablemonthly average 0.0031 mg/L, tighterOct 1, 20290.0225 mg/L (5 values, 2 below detection)7.26×
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—Selenium, total recoverabledaily maximum 0.0075 mg/L, tighterOct 1, 20290.0225 mg/L (5 values, 2 below detection)3×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDSelenium, total recoverabledaily maximum 0.0075 mg/L, tighterJun 1, 20280.005 mg/L (11 values)0.667×
INDIANAPOLIS BELMONT & SOUTHPORT AWTPIN0023183INSewage plant, major125 MGDSelenium, total recoverabledaily maximum 0.0075 mg/L, newMay 1, 20290.0071 mg/L (11 values)0.947×
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSelenium, total recoverabledaily maximum 0.0075 mg/L, newJul 1, 2029under 3 values—
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSelenium, total recoverabledaily maximum 0.31 lb/d, newJul 1, 2029under 3 values—
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSelenium, total recoverablemonthly average 0.13 lb/d, newJul 1, 2029under 3 values—
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSelenium, total recoverablemonthly average 0.0031 mg/L, newJul 1, 2029under 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=IN&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