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In Louisiana, for Nitrogen, ammonia [NH3-N]: 3 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Sep 1, 2028 and Oct 1, 2029 (9 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 · LA 3
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
| Plant | Permit | State | Type | Design flow | Parameter | New limit | Effective | Today's median | × limit |
|---|---|---|---|---|---|---|---|---|---|
| MAGNOLIA WATER UTILITY OPERATING CO., LLC - OAKWOOD REGIONAL WWT FACILITY | LA0052078 | LA | Industrial | — | Nitrogen, ammonia [NH3-N] | daily maximum 4.4 mg/L, new | Sep 1, 2028 | under 3 values | — |
| MAGNOLIA WATER UTILITY OPERATING CO., LLC - OAKWOOD REGIONAL WWT FACILITY | LA0052078 | LA | Industrial | — | Nitrogen, ammonia [NH3-N] | monthly average 14 lb/d, new | Sep 1, 2028 | under 3 values | — |
| MAGNOLIA WATER UTILITY OPERATING CO., LLC - OAKWOOD REGIONAL WWT FACILITY | LA0052078 | LA | Industrial | — | Nitrogen, ammonia [NH3-N] | monthly average 1.9 mg/L, new | Sep 1, 2028 | under 3 values | — |
| Greenwood Town of - STP | LA0093611 | LA | Sewage plant | .45 MGD | Nitrogen, ammonia [NH3-N] | monthly average 0.74 mg/L, new | Jun 2, 2029 | under 3 values | — |
| Greenwood Town of - STP | LA0093611 | LA | Sewage plant | .45 MGD | Nitrogen, ammonia [NH3-N] | monthly average 2.78 lb/d, new | Jun 2, 2029 | under 3 values | — |
| Greenwood Town of - STP | LA0093611 | LA | Sewage plant | .45 MGD | Nitrogen, ammonia [NH3-N] | weekly average 3.33 mg/L, new | Jun 2, 2029 | under 3 values | — |
| Franklin Parish Sheriff's Department - Franklin Parish Detention Center WWTP | LA0122823 | LA | Sewage plant | .131 MGD | Nitrogen, ammonia [NH3-N] | monthly average 1.7 lb/d, new | Oct 1, 2029 | under 3 values | — |
| Franklin Parish Sheriff's Department - Franklin Parish Detention Center WWTP | LA0122823 | LA | Sewage plant | .131 MGD | Nitrogen, ammonia [NH3-N] | monthly average 1.5 mg/L, new | Oct 1, 2029 | under 3 values | — |
| Franklin Parish Sheriff's Department - Franklin Parish Detention Center WWTP | LA0122823 | LA | Sewage plant | .131 MGD | Nitrogen, ammonia [NH3-N] | weekly average 7 mg/L, new | Oct 1, 2029 | under 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