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Plants facing new discharge limits — by state and pollutant

In Louisiana, for Solids, total dissolved: 4 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jul 1, 2027 and Dec 1, 2028 (10 limits); 1 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 · LA 4 · TX 4 · NY 2 · PA 2 · IA 1 · IN 1 · MN 1 · TN 1 · UT 1

By pollutant: all · Nitrogen, ammonia total [as N] 80 · Chlorine, total residual 78 · Copper, total [as Cu] 7 · Zinc, total [as Zn] 7 · Mercury, total [as Hg] 5 · Solids, total dissolved 4 · Solids, total suspended 4 · Nitrogen, ammonia [NH3-N] 3 · BOD, 5-day, 20 deg. C 2 · Cadmium, total [as Cd] 2 · Cyanide, total [as CN] 2 · 1,2-Dichloroethane 1 · 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1 · BOD, carbonaceous [5 day, 20 C] 1 · Carbon tetrachloride 1 · Chromium, hexavalent [as Cr] 1 · Heptachlor 1 · Lead, total [as Pb] 1 · Oil & Grease 1 · Phenolics, total recoverable 1 · Vinyl chloride 1

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
WASHINGTON PARISH GOVERNMENTLA0068101LASewage plant—Solids, total dissolvedmonthly average 496 mg/L, newOct 1, 20272560 mg/L (3 values)5.16×
WASHINGTON PARISH GOVERNMENTLA0068101LASewage plant—Solids, total dissolveddaily maximum 1181 mg/L, newOct 1, 20272560 mg/L (3 values)2.17×
EGAN WATER CORPORATIONLA0125806LAIndustrial—Solids, total dissolvedmonthly average 7870 mg/L, newJul 1, 2027632 mg/L (3 values)0.0803×
EGAN WATER CORPORATIONLA0125806LAIndustrial—Solids, total dissolveddaily maximum 18731 mg/L, newJul 1, 2027632 mg/L (3 values)0.0337×
ST. TAMMANY PARISH GOVERNMENTLA0120235LASewage plant, major1.25 MGDSolids, total dissolvedmonthly average 759 mg/L, newOct 1, 2027282 mg/L (3 values)0.372×
ST. TAMMANY PARISH GOVERNMENTLA0120235LASewage plant, major1.25 MGDSolids, total dissolvedweekly average 1805 mg/L, newOct 1, 2027282 mg/L (3 values)0.156×
ST. TAMMANY PARISH GOVERNMENTLA0120235LASewage plant, major1.25 MGDSolids, total dissolvedmonthly average 7907 lb/d, newOct 1, 20271072 lb/d (3 values)0.136×
Newellton Town of - Town of Newellton WWTPLA0020095LASewage plant.72 MGDSolids, total dissolvedmonthly average 285 mg/L, newDec 1, 2028under 3 values—
Newellton Town of - Town of Newellton WWTPLA0020095LASewage plant.72 MGDSolids, total dissolvedmonthly average 1709 lb/d, newDec 1, 2028under 3 values—
Newellton Town of - Town of Newellton WWTPLA0020095LASewage plant.72 MGDSolids, total dissolvedweekly average 677 mg/L, newDec 1, 2028under 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=LA&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