Passage Data · Check a report · Use it from your AI

Plants facing new discharge limits — by state and pollutant

for Hexachlorobutadiene: 5 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Feb 1, 2027 and Jul 1, 2029 (12 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: TX 5

By pollutant: all · Nitrogen, ammonia total [as N] 526 · Chlorine, total residual 272 · Phosphorus, total [as P] 106 · E. coli 103 · Copper, total [as Cu] 85 · Copper, total recoverable 63 · Solids, total suspended 60 · Chloride [as Cl] 56 · BOD, carbonaceous [5 day, 20 C] 48 · Zinc, total [as Zn] 39 · Zinc, total recoverable 36 · BOD, 5-day, 20 deg. C 35 · pH 31 · Cyanide, free available 30 · Nitrogen, total [as N] 28 · Iron, total [as Fe] 22 · Mercury, total [as Hg] 22 · Toxicity [acute], Ceriodaphnia dubia 22 · Toxicity [acute], Pimephales promelas [Fathead Minnow] 21 · Selenium, total [as Se] 20 · Di[2-ethylhexyl] phthalate [DEHP] 19 · E. coli, MTEC-MF 19 · Mercury, total low level 19 · Toxicity [chronic], Ceriodaphnia dubia 18 · Toxicity [chronic], Pimephales promelas [Fathead Minnow] 18

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
METTON AMERICA INCTX0084808TXIndustrial—Hexachlorobutadienedaily average 0.00751 mg/L, tighterFeb 1, 2027under 3 values—
METTON AMERICA INCTX0084808TXIndustrial—Hexachlorobutadienedaily average 0.00013 lb/d, tighterFeb 1, 2027under 3 values—
METTON AMERICA INCTX0084808TXIndustrial—Hexachlorobutadienedaily maximum 0.00027 lb/d, tighterFeb 1, 2027under 3 values—
METTON AMERICA INCTX0084808TXIndustrial—Hexachlorobutadienedaily maximum 0.0159 mg/L, tighterFeb 1, 2027under 3 values—
SI GROUP INCTX0087254TXIndustrial.022 MGDHexachlorobutadienedaily average 0.000501 mg/L, tighterMar 1, 2027under 3 values—
SI GROUP INCTX0087254TXIndustrial.022 MGDHexachlorobutadienedaily maximum 0.00106 mg/L, tighterMar 1, 2027under 3 values—
BRASKEM AMERICA INCTX0074276TXIndustrial, major.622 MGDHexachlorobutadienedaily average 0.0113 lb/d, tighterSep 1, 2027under 3 values—
BRASKEM AMERICA INCTX0074276TXIndustrial, major.622 MGDHexachlorobutadienedaily maximum 0.024 lb/d, tighterSep 1, 2027under 3 values—
ECO SERVICES OPERATIONS CORPTX0007072TXIndustrial, major1.44 MGDHexachlorobutadienedaily average 0.06 lb/d, tighterNov 1, 2027under 3 values—
ECO SERVICES OPERATIONS CORPTX0007072TXIndustrial, major1.44 MGDHexachlorobutadienedaily maximum 0.13 lb/d, tighterNov 1, 2027under 3 values—
INEOS ACETYLS CHEMICALS TEXAS CITY INCTX0005762TXIndustrial, major3.24 MGDHexachlorobutadienedaily average 0.0075 mg/L, newJul 1, 2029under 3 values—
INEOS ACETYLS CHEMICALS TEXAS CITY INCTX0005762TXIndustrial, major3.24 MGDHexachlorobutadienedaily maximum 0.16 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=OH&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