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Plants facing new discharge limits — by state and pollutant

In South Carolina, for Chlorine, total residual: 8 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Feb 1, 2027 and Jan 1, 2031 (20 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 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 8 · Nitrogen, ammonia total [as N] 8 · BOD, 5-day, 20 deg. C 7 · Copper, total [as Cu] 5 · Lead, total [as Pb] 3 · Oxygen demand, ultimate 3 · Phosphorus, total [as P] 3 · Zinc, total [as Zn] 3 · %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia 2 · Cadmium, total [as Cd] 2 · E. coli 2 · Mercury, total [as Hg] 2 · Solids, total suspended 2 · Bis[chloromethyl] ether 1 · BOD, carbonaceous [5 day, 20 C] 1 · Chromium, hexavalent [as Cr] 1 · Flow, in conduit or thru treatment plant 1 · Length of longest pH excursion 1 · Nitrogen, total [as N] 1 · Peracetic Acid 1 · pH 1 · pH range excursions, monthly total accum 1 · Polychlorinated biphenyls [PCBs] 1 · Selenium, total [as Se] 1 · Temp. diff. between up/down stream deg. F 1

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
Donald LedfordSC0046892SCSewage plant, major7.5 MGDChlorine, total residualmonthly average 0.35 mg/L, tighterFeb 1, 20270.32 mg/L (11 values)0.914×
Donald LedfordSC0046892SCSewage plant, major7.5 MGDChlorine, total residualdaily maximum 0.6 mg/L, tighterFeb 1, 20270.45 mg/L (11 values)0.75×
CITY OF HARTSVILLESC0021580SCSewage plant, major3.5 MGDChlorine, total residualdaily maximum 4.1 lb/d, tighterMay 1, 20270.53 lb/d (11 values, 9 below detection)—
CITY OF HARTSVILLESC0021580SCSewage plant, major3.5 MGDChlorine, total residualdaily maximum 0.11 mg/L, tighterMay 1, 20270.05 mg/L (11 values, 10 below detection)—
CITY OF HARTSVILLESC0021580SCSewage plant, major3.5 MGDChlorine, total residualmonthly average 2.3 lb/d, tighterMay 1, 20270.48 lb/d (11 values, 11 below detection)—
CITY OF HARTSVILLESC0021580SCSewage plant, major3.5 MGDChlorine, total residualmonthly average 0.06 mg/L, tighterMay 1, 20270.05 mg/L (11 values, 11 below detection)—
JACABB UTILITIES LLCSC0000591SCIndustrial.25 MGDChlorine, total residualdaily maximum 0.8 mg/L, tighterMay 1, 2028under 3 values—
LYMAN TOWN OFSC0021300SCSewage plant, major4.5 MGDChlorine, total residualdaily maximum 0.032 mg/L, tighterDec 1, 20280 mg/L (10 values)0×
LYMAN TOWN OFSC0021300SCSewage plant, major4.5 MGDChlorine, total residualmonthly average 0.018 mg/L, tighterDec 1, 20280 mg/L (10 values)0×
(Unknown Permittee)SC0049363SCIndustrial1 MGDChlorine, total residualdaily maximum 0.028 mg/L, tighterJul 1, 2029under 3 values—
(Unknown Permittee)SC0049363SCIndustrial1 MGDChlorine, total residualmonthly average 0.016 mg/L, tighterJul 1, 2029under 3 values—
GRAND STRAND WATER & SEWER AUTHORITYSC0037753SCSewage plant, major41.75 MGDChlorine, total residualmonthly average 0.242 mg/L, tighterJun 1, 20300.166 mg/L (11 values)0.686×
GRAND STRAND WATER & SEWER AUTHORITYSC0037753SCSewage plant, major41.75 MGDChlorine, total residualdaily maximum 0.417 mg/L, tighterJun 1, 20300.21 mg/L (11 values)0.504×
GRAND STRAND WATER & SEWER AUTHORITYSC0037753SCSewage plant, major41.75 MGDChlorine, total residualmonthly average 89.7 lb/d, tighterJun 1, 203034.65 lb/d (11 values)0.386×
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDChlorine, total residualdaily maximum 0.022 mg/L, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDChlorine, total residualdaily maximum 0.77 lb/d, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDChlorine, total residualmonthly average 0.46 lb/d, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDChlorine, total residualmonthly average 0.013 mg/L, newAug 1, 2030under 3 values—
Daniel QuattlebaumSC0048313SCSewage plant.95 MGDChlorine, total residualdaily maximum 0.064 mg/L, tighterJan 1, 20310 mg/L (11 values)0×
Daniel QuattlebaumSC0048313SCSewage plant.95 MGDChlorine, total residualmonthly average 0.037 mg/L, tighterJan 1, 20310 mg/L (11 values)0×

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=SC&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