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Plants facing new discharge limits — by state and pollutant

In Texas, for Zinc, total [as Zn]: 11 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Dec 1, 2026 and Mar 1, 2029 (24 limits); 5 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 · PA 12 · TX 11 · LA 7 · SC 3 · IA 2 · MD 1 · MN 1 · NY 1 · WA 1

By pollutant: all · Zinc, total [as Zn] 11 · BOD, carbonaceous [5 day, 20 C] 8 · Copper, total [as Cu] 8 · Benzo[a]anthracene 7 · Benzo[a]pyrene 7 · Hexachlorobenzene 7 · Nitrogen, ammonia total [as N] 7 · Solids, total suspended 6 · Hexachlorobutadiene 5 · Cyanide, free [as free] 4 · Solids, total dissolved 4 · Aluminum, total [as Al] 3 · Chromium, hexavalent [as Cr] 3 · Nickel, total [as Ni] 3 · Selenium, total [as Se] 3 · Chloride [as Cl] 2 · Di[2-ethylhexyl] phthalate [DEHP] 2 · Enterococci 2 · Flow, in conduit or thru treatment plant 2 · Hexachloroethane 2 · Lead, total [as Pb] 2 · Phosphorus, total [as P] 2 · 1,2-Dichloropropane 1 · 4,4'-DDT 1 · Barium, total [as Ba] 1

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
FREEPORT LNG DEVELOPMENT LPTX0127566TXIndustrial—Zinc, total [as Zn]daily average 0.255 mg/L, newMar 1, 20270.937 mg/L (8 values)3.67×
FREEPORT LNG DEVELOPMENT LPTX0127566TXIndustrial—Zinc, total [as Zn]daily maximum 0.539 mg/L, newMar 1, 20271.065 mg/L (8 values)1.98×
ODFJELL TERMINALS (HOUSTON) INCTX0089192TXIndustrial—Zinc, total [as Zn]daily average 0.245 mg/L, newJul 1, 20270.248 mg/L (9 values)1.01×
GEORGIA-PACIFIC WOOD PRODUCTS LLCTX0006076TXIndustrial.01 MGDZinc, total [as Zn]daily maximum 0.443 mg/L, newNov 1, 20271.105 mg/L (4 values)2.49×
HARTREE CHANNELVIEW LLCTX0136573TXIndustrial—Zinc, total [as Zn]daily average 0.15 mg/L, newDec 1, 20270.26 mg/L (11 values)1.73×
HARTREE CHANNELVIEW LLCTX0136573TXIndustrial—Zinc, total [as Zn]daily maximum 0.318 mg/L, newDec 1, 20270.4 mg/L (11 values)1.26×
FOREMARK PERFORMANCE CHEMICALS INCTX0122335TXIndustrial.6 MGDZinc, total [as Zn]daily average 0.25 mg/L, newMar 1, 202827.8 mg/L (11 values)111×
FOREMARK PERFORMANCE CHEMICALS INCTX0122335TXIndustrial.6 MGDZinc, total [as Zn]daily maximum 0.53 mg/L, newMar 1, 202843.1 mg/L (11 values)81.3×
SHELL CHEMICAL LPTX0004863TXIndustrial, major9.9 MGDZinc, total [as Zn]daily average 0.138 mg/L, tighterDec 1, 20260.0345 mg/L (6 values)0.25×
SHELL CHEMICAL LPTX0004863TXIndustrial, major9.9 MGDZinc, total [as Zn]daily maximum 0.292 mg/L, tighterDec 1, 20260.051 mg/L (6 values)0.175×
SHELL CHEMICAL LPTX0004863TXIndustrial, major9.9 MGDZinc, total [as Zn]daily average 0.141 mg/L, tighterDec 1, 2026under 3 values—
SHELL CHEMICAL LPTX0004863TXIndustrial, major9.9 MGDZinc, total [as Zn]daily maximum 0.299 mg/L, tighterDec 1, 2026under 3 values—
FREEPORT LNG DEVELOPMENT LPTX0127566TXIndustrial—Zinc, total [as Zn]daily average 0.255 mg/L, newMar 1, 20270.24 mg/L (10 values)0.941×
FREEPORT LNG DEVELOPMENT LPTX0127566TXIndustrial—Zinc, total [as Zn]daily maximum 0.539 mg/L, newMar 1, 20270.285 mg/L (10 values)0.529×
STOLTHAVEN HOUSTON, INC.TX0091855TXIndustrial, major—Zinc, total [as Zn]daily average 0.165 mg/L, tighterJun 1, 20270.005005 mg/L (4 values)0.0303×
STOLTHAVEN HOUSTON, INC.TX0091855TXIndustrial, major—Zinc, total [as Zn]daily maximum 0.35 mg/L, tighterJun 1, 20270.005005 mg/L (4 values)0.0143×
ODFJELL TERMINALS (HOUSTON) INCTX0089192TXIndustrial—Zinc, total [as Zn]daily maximum 0.52 mg/L, newJul 1, 20270.296 mg/L (9 values)0.569×
WEATHERFORD US LPTX0089940TXIndustrial.0108 MGDZinc, total [as Zn]daily average 0.192 mg/L, tighterOct 1, 20270.0232 mg/L (11 values, 1 below detection)0.121×
WEATHERFORD US LPTX0089940TXIndustrial.0108 MGDZinc, total [as Zn]daily maximum 0.408 mg/L, tighterOct 1, 20270.0284 mg/L (11 values, 1 below detection)0.0696×
NORTHWEST AIRPORT MANAGEMENT LPTX0138479TXIndustrial—Zinc, total [as Zn]daily average 0.175 mg/L, newNov 1, 2027under 3 values—
NORTHWEST AIRPORT MANAGEMENT LPTX0138479TXIndustrial—Zinc, total [as Zn]daily maximum 0.372 mg/L, newNov 1, 2027under 3 values—
ENTERPRISE PRODUCTS OPERATING LLCTX0139076TXIndustrial—Zinc, total [as Zn]daily average 0.262 mg/L, newFeb 1, 20280.082 mg/L (11 values)0.313×
ENTERPRISE PRODUCTS OPERATING LLCTX0139076TXIndustrial—Zinc, total [as Zn]daily maximum 0.555 mg/L, newFeb 1, 20280.113 mg/L (11 values)0.204×
REAGENT CHEMICAL & RESEARCH INCTX0125369TXIndustrial.046 MGDZinc, total [as Zn]daily maximum 0.509 mg/L, newMar 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=TX&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