for Phosphorus, Total As P: 17 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jan 1, 2027 and Sep 1, 2028 (17 limits); 9 of them reported a median above that limit between Oct 1, 2025 and Sep 30, 2026. EPA's file of Oct 16, 2026.

Plant	Permit	State	Type	Design flow	Parameter	New limit	Effective	Today's median	× limit
Neighbors of Walnut Grove, LLC	KS0092053	KS	Industrial	—	Phosphorus, Total As P	DG 0.5 lb/d, new	Jan 1, 2027	0.5659 lb/d (11 values)	1.13×
JUNCTION CITY, CITY OF	KS0092151	KS	Sewage plant	—	Phosphorus, Total As P	DG 20.9 lb/d, new	Apr 1, 2027	61.18 lb/d (12 values)	2.93×
SALINA, CITY OF	KS0038474	KS	Sewage plant, major	—	Phosphorus, Total As P	DG 60.6 lb/d, new	Sep 1, 2027	69.71 lb/d (11 values)	1.15×
HALSTEAD, CITY OF	KS0026263	KS	Sewage plant	—	Phosphorus, Total As P	DG 3.51 lb/d, new	Nov 1, 2027	4.99 lb/d (11 values)	1.42×
SHERWOOD IMPROVEMENT DISTRICT (WWTP)	KS0117731	KS	Sewage plant, major	—	Phosphorus, Total As P	DG 20.05 lb/d, new	Dec 1, 2027	33.45 lb/d (11 values)	1.67×
HILL'S PET NUTRITION, INC.	KS0003077	KS	Industrial	—	Phosphorus, Total As P	DG 1.14 lb/d, new	Jan 1, 2028	5.089 lb/d (11 values)	4.46×
LAWRENCE, CITY OF	KS0038644	KS	Sewage plant, major	—	Phosphorus, Total As P	DG 104.4 lb/d, new	Jan 1, 2028	188 lb/d (11 values)	1.8×
WELLINGTON, CITY OF	KS0099571	KS	Sewage plant, major	—	Phosphorus, Total As P	DG 14.3 lb/d, new	Jul 1, 2028	26.38 lb/d (11 values)	1.85×
WICHITA, CITY OF	KS0043036	KS	Sewage plant, major	—	Phosphorus, Total As P	DG 317.45 lb/d, new	Sep 1, 2028	1111 lb/d (11 values)	3.5×
Lubrication Engineers Inc.	KS0081132	KS	Industrial	—	Phosphorus, Total As P	DG 0.04 lb/d, new	Jan 1, 2027	under 3 values	—
CREEKSTONE FARMS PREMIUM BEEF	KS0094706	KS	Industrial	—	Phosphorus, Total As P	DG 41.77 lb/d, new	Apr 1, 2027	24.22 lb/d (5 values)	0.58×
KDWP - MILFORD FISH HATCHERY	KS0083275	KS	Industrial	—	Phosphorus, Total As P	DG 0.9 lb/d, new	Apr 1, 2027	under 3 values	—
TOPEKA NORTH WASTEWATER PLANT (WWTP)	KS0042714	KS	Sewage plant, major	—	Phosphorus, Total As P	DG 100.26 lb/d, new	Jul 1, 2027	51.5 lb/d (11 values)	0.514×
COLBY, CITY OF	KS0098698	KS	Sewage plant	—	Phosphorus, Total As P	DG 12.5 lb/d, new	Sep 1, 2027	8.801 lb/d (11 values)	0.704×
AUGUSTA, CITY OF	KS0094561	KS	Sewage plant, major	—	Phosphorus, Total As P	DG 12.53 lb/d, new	Sep 1, 2027	1.734 lb/d (11 values)	0.138×
FRONTENAC, CITY OF (NEW MECHANICAL WWTP)	KS0200025	KS	Industrial	—	Phosphorus, Total As P	DG 8.86 lb/d, new	Jun 1, 2028	under 3 values	—
ST. MARYS, CITY OF	KS0020974	KS	Sewage plant	—	Phosphorus, Total As P	DG 4.18 lb/d, new	Jul 1, 2028	4.061 lb/d (12 values)	0.971×

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

Plants facing new discharge limits — by state and pollutant