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Plants facing new discharge limits — by state and pollutant

In Oregon, for Chlorine, total residual: 6 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jan 1, 2028 and Dec 1, 2029 (32 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 · LA 78 · PA 70 · AR 45 · IA 20 · OH 16 · SC 8 · OR 6 · GA 4 · NY 4 · IL 3 · MS 3 · TN 3 · MI 2 · MO 2 · VA 2 · CO 1 · ME 1 · MN 1 · NE 1 · PR 1 · UT 1

By pollutant: all · Chlorine, total residual 6 · Nitrogen, ammonia total [as N] 4 · Excess thermal load 2 · Cadmium, total recoverable 1 · Copper, total recoverable 1 · Enterococci 1 · Enterococci - % samples exceeding limit 1 · Nitrite + Nitrate total [as N] 1 · pH 1 · Phosphorus, total [as P] 1 · Thermal Discharge 1

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
GRAND RONDE SANITARY DISTRICTOR0031453ORSewage plant.38 MGDChlorine, total residualdaily maximum 0.05 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighterJan 1, 20280.08 mg/L (6 values)1.6×
US ARMY CORPS OF ENGINEERS, BONNEVILLE LOCK AND DAMOR0022624ORFederal—Chlorine, total residualmonthly average 0.42 mg/L, newJan 1, 20280.6 mg/L (11 values)1.43×
PORTLAND, CITY OFOR0026891ORSewage plant, major8.3 MGDChlorine, total residualmonthly average 0.16 mg/L, tighterJun 1, 20280.465 mg/L (12 values)2.91×
PORTLAND, CITY OFOR0026891ORSewage plant, major8.3 MGDChlorine, total residualdaily maximum 0.42 mg/L, tighterJun 1, 20280.75 mg/L (12 values)1.79×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.41 mg/L (7 values)8.2×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.34 mg/L (7 values)6.8×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.34 mg/L (7 values)6.8×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.33 mg/L (7 values)6.6×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.33 mg/L (7 values)6.6×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.33 mg/L (7 values)6.6×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.33 mg/L (7 values)6.6×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.33 mg/L (7 values)6.6×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.26 mg/L (7 values)5.2×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.26 mg/L (7 values)5.2×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.26 mg/L (7 values)5.2×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.26 mg/L (7 values)5.2×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.26 mg/L (7 values)5.2×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.26 mg/L (7 values)5.2×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.215 mg/L (6 values)4.3×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.21 mg/L (7 values)4.2×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.185 mg/L (6 values)3.7×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.18 mg/L (7 values)3.6×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualdaily maximum 0.05 mg/L, newFeb 1, 20290.1 mg/L (6 values)2×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.085 mg/L (6 values)1.7×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.075 mg/L (6 values)1.5×
GARIBALDI, CITY OFOR0020362ORSewage plant.5 MGDChlorine, total residualdaily maximum 0.05 mg/L, tighterSep 30, 20290.18 mg/L (12 values)3.6×
GARIBALDI, CITY OFOR0020362ORSewage plant.5 MGDChlorine, total residualmonthly average 0.05 mg/L, tighterSep 30, 20290.06 mg/L (12 values)1.2×
US ARMY CORPS OF ENGINEERS, BONNEVILLE LOCK AND DAMOR0022624ORFederal—Chlorine, total residualdaily maximum 1.1 mg/L, newJan 1, 20281.095 mg/L (8 values)0.995×
GRAND RONDE SANITARY DISTRICTOR0031453ORSewage plant.38 MGDChlorine, total residualmonthly average 0.05 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighterJan 1, 20280.04 mg/L (6 values)0.8×
U.S. Army Corps of Engineers-McNary Lock and DamOR0055000ORFederal—Chlorine, total residualmonthly average 0.05 mg/L, newFeb 1, 20290.05 mg/L (6 values)1×
WILLAMETTE LEADERSHIP ACADEMYOR0027235ORIndustrial—Chlorine, total residualdaily maximum 0.05 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighterDec 1, 20290.03 mg/L (5 values)0.6×
WILLAMETTE LEADERSHIP ACADEMYOR0027235ORIndustrial—Chlorine, total residualmonthly average 0.05 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighterDec 1, 20290.01 mg/L (5 values)0.2×

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=OR&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