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Plants facing new discharge limits — by state and pollutant

In South Carolina: 23 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jan 1, 2027 and Jan 1, 2031 (160 limits); 1 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 · IA 204 · PA 172 · LA 165 · OH 134 · MS 68 · AR 58 · TX 57 · MI 53 · GA 52 · VA 52 · MD 48 · NJ 35 · IN 31 · SC 23 · KS 21 · MN 21 · NY 21 · MO 20 · WV 17 · OR 16 · IL 14 · FL 10 · NE 9 · OK 8 · TN 8 · CO 7 · UT 7 · NM 6 · CA 5 · SD 5 · CT 3 · ID 3 · ME 2 · WI 2 · AL 1 · DC 1 · KY 1 · MT 1 · NH 1 · PR 1 · VT 1 · WA 1

By pollutant: 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
INV Nylon Chemicals Americas, LLCSC0002585SCIndustrial, major—Copper, total [as Cu]monthly average 0.011 mg/L, newApr 1, 20280.043 mg/L (3 values)3.91×
INV Nylon Chemicals Americas, LLCSC0002585SCIndustrial, major—Copper, total [as Cu]daily maximum 0.014 mg/L, newApr 1, 20280.043 mg/L (3 values)3.07×
INV Nylon Chemicals Americas, LLCSC0002585SCIndustrial, major—Lead, total [as Pb]monthly average 0.0038 mg/L, newApr 1, 20280.011 mg/L (3 values)2.89×
INV Nylon Chemicals Americas, LLCSC0002585SCIndustrial, major—Zinc, total [as Zn]daily maximum 0.18 mg/L, newApr 1, 20280.265 mg/L (3 values)1.47×
INV Nylon Chemicals Americas, LLCSC0002585SCIndustrial, major—Zinc, total [as Zn]monthly average 0.18 mg/L, newApr 1, 20280.265 mg/L (3 values)1.47×
South Carolina Public Service Authority (Santee Cooper)SC0022471SCIndustrial, major—Length of longest pH excursioninstantaneous maximum 60 min, newJan 1, 2027under 3 values—
South Carolina Public Service Authority (Santee Cooper)SC0022471SCIndustrial, major—pH range excursions, monthly total accummonthly maximum 446 min, newJan 1, 2027under 3 values—
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×
Donald LedfordSC0046892SCSewage plant, major7.5 MGDNitrogen, total [as N]monthly average 47031 lb/d, newFeb 1, 2027under 3 values—
Donald LedfordSC0046892SCSewage plant, major7.5 MGDNitrogen, total [as N]monthly average 470313 lb/d, newFeb 1, 2027under 3 values—
Donald LedfordSC0046892SCSewage plant, major7.5 MGDOxygen demand, ultimatemonthly average 4244 lb/d, newFeb 1, 2027under 3 values—
CITY OF HARTSVILLESC0021580SCSewage plant, major3.5 MGDNitrogen, ammonia total [as N]weekly average 11 mg/L (Mar–Oct), tighterMay 1, 20270.19 mg/L (7 values)0.0173×
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)—
CITY OF HARTSVILLESC0021580SCSewage plant, major3.5 MGDNitrogen, ammonia total [as N]monthly average 7 mg/L (Mar–Oct), tighterMay 1, 20270.18 mg/L (7 values, 4 below detection)—
NUCOR STEEL BERKELEYSC0047392SCIndustrial, major—Zinc, total [as Zn]monthly average 0.086 mg/L, newJul 1, 20270.035 mg/L (11 values)0.407×
NUCOR STEEL BERKELEYSC0047392SCIndustrial, major—Zinc, total [as Zn]daily maximum 0.095 mg/L, newJul 1, 20270.035 mg/L (11 values)0.368×
NUCOR STEEL BERKELEYSC0047392SCIndustrial, major—Chromium, hexavalent [as Cr]daily maximum 0.08 mg/L, newJul 1, 20270 mg/L (11 values)0×
NUCOR STEEL BERKELEYSC0047392SCIndustrial, major—Chromium, hexavalent [as Cr]monthly average 0.05 mg/L, newJul 1, 20270 mg/L (11 values)0×
NUCOR STEEL BERKELEYSC0047392SCIndustrial, major—Copper, total [as Cu]daily maximum 0.0058 mg/L, newJul 1, 20270 mg/L (11 values)0×
NUCOR STEEL BERKELEYSC0047392SCIndustrial, major—Copper, total [as Cu]monthly average 0.0037 mg/L, newJul 1, 20270 mg/L (11 values)0×
NUCOR STEEL BERKELEYSC0047392SCIndustrial, major—Nitrogen, ammonia total [as N]daily maximum 7.56 mg/L (Mar–Oct), newJul 1, 20270 mg/L (7 values)0×
NUCOR STEEL BERKELEYSC0047392SCIndustrial, major—Nitrogen, ammonia total [as N]monthly average 1.13 mg/L (Mar–Oct), newJul 1, 20270 mg/L (7 values)0×
DORCHESTER COUNTYSC0038822SCSewage plant, major10 MGDBOD, carbonaceous [5 day, 20 C]monthly average 6.75 mg/L, tighterOct 1, 20272 mg/L (11 values)0.296×
DORCHESTER COUNTYSC0038822SCSewage plant, major10 MGDBOD, carbonaceous [5 day, 20 C]weekly average 10.13 mg/L, tighterOct 1, 20272 mg/L (11 values)0.197×
BEAUFORT JASPER WATER & SEWER AUTHORITYSC0047279SCSewage plant, major7.5 MGDSelenium, total [as Se]daily maximum 0.02 mg/L, newJan 1, 20280 mg/L (11 values, 1 below detection)0×
BEAUFORT JASPER WATER & SEWER AUTHORITYSC0047279SCSewage plant, major7.5 MGDSelenium, total [as Se]daily maximum 1.5 lb/d, newJan 1, 20280 lb/d (11 values)0×
BEAUFORT JASPER WATER & SEWER AUTHORITYSC0047279SCSewage plant, major7.5 MGDSelenium, total [as Se]monthly average 0.005 mg/L, newJan 1, 20280 mg/L (11 values, 1 below detection)0×
BEAUFORT JASPER WATER & SEWER AUTHORITYSC0047279SCSewage plant, major7.5 MGDSelenium, total [as Se]monthly average 0.38 lb/d, newJan 1, 20280 lb/d (11 values)0×
SI Group Inc.SC0001180SCIndustrial, major—Mercury, total [as Hg]monthly average 0.05 ug/L, newFeb 1, 20280.01435 ug/L (8 values)0.287×
SI Group Inc.SC0001180SCIndustrial, major—Mercury, total [as Hg]daily maximum 0.073 ug/L, newFeb 1, 20280.0156 ug/L (8 values)0.214×
ROCK HILL CITY OFSC0020443SCSewage plant, major20 MGDPeracetic Aciddaily maximum 1 mg/L, newMar 1, 2028under 3 values—
ROCK HILL CITY OFSC0020443SCSewage plant, major20 MGDPeracetic Aciddaily maximum 167 lb/d, newMar 1, 2028under 3 values—
INV Nylon Chemicals Americas, LLCSC0002585SCIndustrial, major—%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average 25 %, newApr 1, 202813 % (9 values)0.52×
INV Nylon Chemicals Americas, LLCSC0002585SCIndustrial, major—%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum 40 %, newApr 1, 202813 % (9 values)0.325×
INV Nylon Chemicals Americas, LLCSC0002585SCIndustrial, major—Cadmium, total [as Cd]monthly average 0.00086 mg/L, newApr 1, 20280.0002 mg/L (3 values)0.233×
INV Nylon Chemicals Americas, LLCSC0002585SCIndustrial, major—Cadmium, total [as Cd]daily maximum 0.0017 mg/L, newApr 1, 20280.0002 mg/L (3 values)0.118×
INV Nylon Chemicals Americas, LLCSC0002585SCIndustrial, major—Lead, total [as Pb]daily maximum 0.098 mg/L, newApr 1, 20280.011 mg/L (3 values)0.112×
JACABB UTILITIES LLCSC0000591SCIndustrial.25 MGDPhosphorus, total [as P]monthly average 1.99 mg/L, tighterMay 1, 20281.53 mg/L (11 values)0.769×
JACABB UTILITIES LLCSC0000591SCIndustrial.25 MGDPhosphorus, total [as P]weekly average 2.99 mg/L, tighterMay 1, 20281.53 mg/L (11 values)0.512×
JACABB UTILITIES LLCSC0000591SCIndustrial.25 MGDBOD, 5-day, 20 deg. Cmonthly average 15 mg/L, tighterMay 1, 20282.8 mg/L (11 values, 4 below detection)0.187×
JACABB UTILITIES LLCSC0000591SCIndustrial.25 MGDBOD, 5-day, 20 deg. Cweekly average 22.5 mg/L, tighterMay 1, 20282.8 mg/L (11 values, 3 below detection)0.124×
JACABB UTILITIES LLCSC0000591SCIndustrial.25 MGDChlorine, total residualdaily maximum 0.8 mg/L, tighterMay 1, 2028under 3 values—
JACABB UTILITIES LLCSC0000591SCIndustrial.25 MGDNitrogen, ammonia total [as N]monthly average 2 mg/L, tighterMay 1, 20280.11 mg/L (11 values, 9 below detection)—
JACABB UTILITIES LLCSC0000591SCIndustrial.25 MGDNitrogen, ammonia total [as N]weekly average 3 mg/L, tighterMay 1, 20280.11 mg/L (11 values, 7 below detection)—
JACABB UTILITIES LLCSC0000591SCIndustrial.25 MGDOxygen demand, ultimatemonthly average 194.28 lb/d, newMay 1, 2028under 3 values—
BEAUFORT JASPER WATER & SEWER AUTHORITYSC0047279SCSewage plant, major7.5 MGDSelenium, total [as Se]daily maximum 1.9 lb/d, newJun 1, 20280 lb/d (11 values)0×
BEAUFORT JASPER WATER & SEWER AUTHORITYSC0047279SCSewage plant, major7.5 MGDSelenium, total [as Se]daily maximum 0.02 mg/L, newJun 1, 20280 mg/L (11 values, 1 below detection)0×
BEAUFORT JASPER WATER & SEWER AUTHORITYSC0047279SCSewage plant, major7.5 MGDSelenium, total [as Se]monthly average 0.47 lb/d, newJun 1, 20280 lb/d (11 values)0×
BEAUFORT JASPER WATER & SEWER AUTHORITYSC0047279SCSewage plant, major7.5 MGDSelenium, total [as Se]monthly average 0.005 mg/L, newJun 1, 20280 mg/L (11 values, 1 below detection)0×
GREAT FALLS TOWN OFSC0021211SCSewage plant, major1.4 MGDCopper, total [as Cu]daily maximum 29 lb/d, newOct 1, 20280 lb/d (3 values)0×
GREAT FALLS TOWN OFSC0021211SCSewage plant, major1.4 MGDCopper, total [as Cu]daily maximum 2.46 mg/L, newOct 1, 20280 mg/L (3 values)0×
GREAT FALLS TOWN OFSC0021211SCSewage plant, major1.4 MGDCopper, total [as Cu]monthly average 1.9 mg/L, newOct 1, 20280 mg/L (3 values)0×
GREAT FALLS TOWN OFSC0021211SCSewage plant, major1.4 MGDCopper, total [as Cu]monthly average 22 lb/d, newOct 1, 20280 lb/d (3 values)0×
GREAT FALLS TOWN OFSC0021211SCSewage plant, major1.4 MGDPolychlorinated biphenyls [PCBs]daily maximum 0.00033 lb/d, newOct 1, 2028under 3 values—
GREAT FALLS TOWN OFSC0021211SCSewage plant, major1.4 MGDPolychlorinated biphenyls [PCBs]daily maximum 0.000028 mg/L, newOct 1, 2028under 3 values—
GREAT FALLS TOWN OFSC0021211SCSewage plant, major1.4 MGDPolychlorinated biphenyls [PCBs]monthly average 0.00016 lb/d, newOct 1, 2028under 3 values—
GREAT FALLS TOWN OFSC0021211SCSewage plant, major1.4 MGDPolychlorinated biphenyls [PCBs]monthly average 0.000014 mg/L, newOct 1, 2028under 3 values—
BEAUFORT JASPER WATER & SEWER AUTHORITYSC0047279SCSewage plant, major7.5 MGDFlow, in conduit or thru treatment plantmonthly average 6 MGD, tighterNov 1, 20282.14 MGD (11 values)0.357×
HARLEYVILLE TOWN OFSC0038504SCSewage plant.225 MGDBOD, 5-day, 20 deg. Cmonthly average 9.27 mg/L, tighterNov 1, 20282 mg/L (11 values)0.216×
HARLEYVILLE TOWN OFSC0038504SCSewage plant.225 MGDBOD, 5-day, 20 deg. Cweekly average 14 mg/L, tighterNov 1, 20282 mg/L (11 values)0.143×
HARLEYVILLE TOWN OFSC0038504SCSewage plant.225 MGDBOD, 5-day, 20 deg. Cmonthly average 17.4 lb/d, tighterNov 1, 20281.61 lb/d (11 values)0.0925×
HARLEYVILLE TOWN OFSC0038504SCSewage plant.225 MGDBOD, 5-day, 20 deg. Cweekly average 26 lb/d, tighterNov 1, 20282.19 lb/d (11 values)0.0842×
Jeff KaiserSC0030112SCIndustrial.63 MGDPhosphorus, total [as P]monthly average 6.7 lb/d, tighterDec 1, 20280.85 lb/d (11 values)0.127×
Jeff KaiserSC0030112SCIndustrial.63 MGDBOD, 5-day, 20 deg. Cdaily maximum 87.14 lb/d, tighterDec 1, 20287.61 lb/d (11 values)0.0873×
Jeff KaiserSC0030112SCIndustrial.63 MGDBOD, 5-day, 20 deg. Cmonthly average 43.57 lb/d, tighterDec 1, 20283.26 lb/d (11 values)0.0748×
Jeff KaiserSC0030112SCIndustrial.63 MGDSolids, total suspendedmonthly average 100 lb/d, tighterDec 1, 20286.71 lb/d (11 values)0.0671×
Jeff KaiserSC0030112SCIndustrial.63 MGDPhosphorus, total [as P]daily maximum 13.3 lb/d, tighterDec 1, 20280.85 lb/d (11 values)0.0639×
Jeff KaiserSC0030112SCIndustrial.63 MGDSolids, total suspendeddaily maximum 200 lb/d, tighterDec 1, 20289.89 lb/d (11 values)0.0494×
LYMAN TOWN OFSC0021300SCSewage plant, major4.5 MGDBis[chloromethyl] etherdaily maximum 0.001 mg/L, tighterDec 1, 20280 mg/L (11 values)0×
LYMAN TOWN OFSC0021300SCSewage plant, major4.5 MGDBis[chloromethyl] ethermonthly average 0.0007 mg/L, tighterDec 1, 20280 mg/L (11 values)0×
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×
ISLE OF PALMS WATER & SEWER COMMISSIONSC0043583SCSewage plant.22 MGDCopper, total [as Cu]daily maximum 0.083 mg/L, newJan 1, 20290 mg/L (6 values)0×
ISLE OF PALMS WATER & SEWER COMMISSIONSC0043583SCSewage plant.22 MGDCopper, total [as Cu]monthly average 0.053 mg/L, newJan 1, 20290 mg/L (6 values)0×
KERSHAW COUNTYSC0039870SCSewage plant, major2 MGDBOD, 5-day, 20 deg. Cweekly average 25 mg/L, tighterApr 1, 202913.2 mg/L (11 values)0.528×
KERSHAW COUNTYSC0039870SCSewage plant, major2 MGDBOD, 5-day, 20 deg. Cmonthly average 16.6 mg/L, tighterApr 1, 20297.75 mg/L (11 values)0.467×
KERSHAW COUNTYSC0039870SCSewage plant, major2 MGDNitrogen, ammonia total [as N]weekly average 13.2 mg/L, tighterApr 1, 20291 mg/L (11 values)0.0758×
KERSHAW COUNTYSC0039870SCSewage plant, major2 MGDNitrogen, ammonia total [as N]monthly average 8.8 mg/L, tighterApr 1, 20290.45 mg/L (11 values)0.0511×
(Unknown Permittee)SC0029742SCIndustrial—E. colidaily maximum 349 MPN/100mL (Apr–Sep), tighterApr 1, 2029under 3 values—
(Unknown Permittee)SC0029742SCIndustrial—Nitrogen, ammonia total [as N]monthly average 20 mg/L, newApr 1, 20290.1 mg/L (11 values, 6 below detection)—
(Unknown Permittee)SC0029742SCIndustrial—Nitrogen, ammonia total [as N]monthly average 7.51 lb/d, newApr 1, 20290.0124 lb/d (11 values, 6 below detection)—
(Unknown Permittee)SC0029742SCIndustrial—Temp. diff. between up/down stream deg. Fdaily maximum 1 deg F, newApr 1, 2029under 3 values—
(Unknown Permittee)SC0029742SCIndustrial—Temp. diff. between up/down stream deg. Fmonthly average 1 deg F, newApr 1, 2029under 3 values—
(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—
(Unknown Permittee)SC0049366SCSewage plant1 MGDCadmium, total [as Cd]daily maximum 0.015 lb/d, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDCadmium, total [as Cd]daily maximum 1.8 ug/L, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDCadmium, total [as Cd]monthly average 0.9 ug/L, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDCadmium, total [as Cd]monthly average 0.0075 lb/d, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDCopper, total [as Cu]daily maximum 0.11 lb/d, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDCopper, total [as Cu]daily maximum 12.7 ug/L, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDCopper, total [as Cu]monthly average 0.081 lb/d, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDCopper, total [as Cu]monthly average 9.7 ug/L, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDLead, total [as Pb]daily maximum 91 ug/L, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDLead, total [as Pb]daily maximum 0.76 lb/d, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDLead, total [as Pb]monthly average 0.029 lb/d, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDLead, total [as Pb]monthly average 3.5 ug/L, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDMercury, total [as Hg]daily maximum 73 ng/L, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDMercury, total [as Hg]daily maximum 0.00061 lb/d, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDMercury, total [as Hg]monthly average 0.00042 lb/d, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDMercury, total [as Hg]monthly average 50 ng/L, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDZinc, total [as Zn]daily maximum 0.16 mg/L, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDZinc, total [as Zn]daily maximum 1.3 lb/d, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDZinc, total [as Zn]monthly average 0.16 mg/L, newJul 1, 2029under 3 values—
(Unknown Permittee)SC0049366SCSewage plant1 MGDZinc, total [as Zn]monthly average 1.3 lb/d, newJul 1, 2029under 3 values—
BERKELEY COUNTY WATER & SANITATION AUTHORITYSC0039764SCSewage plant6 MGDBOD, 5-day, 20 deg. Cmonthly average 15 mg/L, tighterApr 1, 20303 mg/L (11 values)0.2×
BERKELEY COUNTY WATER & SANITATION AUTHORITYSC0039764SCSewage plant6 MGDBOD, 5-day, 20 deg. Cweekly average 23 mg/L, tighterApr 1, 20304 mg/L (11 values)0.174×
BERKELEY COUNTY WATER & SANITATION AUTHORITYSC0039764SCSewage plant6 MGDNitrogen, ammonia total [as N]weekly average 9.18 mg/L, tighterApr 1, 20300.2 mg/L (11 values)0.0218×
BERKELEY COUNTY WATER & SANITATION AUTHORITYSC0039764SCSewage plant6 MGDNitrogen, ammonia total [as N]monthly average 6.12 mg/L, tighterApr 1, 20300.1 mg/L (11 values)0.0163×
BERKELEY COUNTY WATER & SANITATION AUTHORITYSC0039764SCSewage plant6 MGDNitrogen, ammonia total [as N]monthly average 459 lb/d, tighterApr 1, 20303.6 lb/d (11 values)0.00784×
BERKELEY COUNTY WATER & SANITATION AUTHORITYSC0039764SCSewage plant6 MGDNitrogen, ammonia total [as N]weekly average 689 lb/d, tighterApr 1, 20305.3 lb/d (11 values)0.00769×
BERKELEY COUNTY WATER & SANITATION AUTHORITYSC0039764SCSewage plant6 MGDLead, total [as Pb]monthly average 0.02 mg/L, newApr 1, 20300 mg/L (11 values)0×
BERKELEY COUNTY WATER & SANITATION AUTHORITYSC0039764SCSewage plant6 MGDLead, total [as Pb]monthly average 1.5 lb/d, newApr 1, 20300 lb/d (11 values)0×
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 MGD%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum 40 %, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGD%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average 25 %, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDBOD, 5-day, 20 deg. Cmonthly average 587 lb/d, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDBOD, 5-day, 20 deg. Cmonthly average 16.77 mg/L, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDBOD, 5-day, 20 deg. Cweekly average 25.16 mg/L, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDBOD, 5-day, 20 deg. Cweekly average 881 lb/d, newAug 1, 2030under 3 values—
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—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDE. coli30-day geometric mean 126 MPN/100mL, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDE. coli30-day geometric mean 126 MPN/100mL, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDE. colidaily maximum 800 MPN/100mL, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDE. colidaily maximum 349 MPN/100mL, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDNitrogen, ammonia total [as N]monthly average 1.43 mg/L (Mar–Oct), newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDNitrogen, ammonia total [as N]monthly average 50 lb/d (Mar–Oct), newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDNitrogen, ammonia total [as N]monthly average 65 lb/d (Jan, Feb, Nov, Dec), newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDNitrogen, ammonia total [as N]monthly average 1.86 mg/L (Jan, Feb, Nov, Dec), newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDNitrogen, ammonia total [as N]weekly average 70 lb/d (Mar–Oct), newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDNitrogen, ammonia total [as N]weekly average 2 mg/L (Mar–Oct), newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDNitrogen, ammonia total [as N]weekly average 2.6 mg/L (Jan, Feb, Nov, Dec), newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDNitrogen, ammonia total [as N]weekly average 91 lb/d (Jan, Feb, Nov, Dec), newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDOxygen demand, ultimatemonthly average 1110 lb/d, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDOxygen demand, ultimateweekly average 1665 lb/d, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDPhosphorus, total [as P]monthly average 0 kg/d, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDSolids, total suspendedmonthly average 21 mg/L, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDSolids, total suspendedmonthly average 736 lb/d, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDSolids, total suspendedweekly average 30 mg/L, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDSolids, total suspendedweekly average 1051 lb/d, newAug 1, 2030under 3 values—
Easley Combined UtilitiesSC0039853SCSewage plant, major3.5 MGDpHmaximum 8.5 SU, newAug 1, 2030under 3 values—
Daniel QuattlebaumSC0048313SCSewage plant.95 MGDBOD, 5-day, 20 deg. Cmonthly average 15 mg/L, tighterJan 1, 20312.2 mg/L (11 values)0.147×
Daniel QuattlebaumSC0048313SCSewage plant.95 MGDBOD, 5-day, 20 deg. Cweekly average 22.5 mg/L, tighterJan 1, 20312.5 mg/L (11 values)0.111×
Daniel QuattlebaumSC0048313SCSewage plant.95 MGDBOD, 5-day, 20 deg. Cmonthly average 156 lb/d, tighterJan 1, 20316.3 lb/d (11 values)0.0404×
Daniel QuattlebaumSC0048313SCSewage plant.95 MGDBOD, 5-day, 20 deg. Cweekly average 235 lb/d, tighterJan 1, 20317 lb/d (11 values)0.0298×
Daniel QuattlebaumSC0048313SCSewage plant.95 MGDNitrogen, ammonia total [as N]monthly average 4.1 mg/L (Mar–Oct), tighterJan 1, 20310.1 mg/L (7 values)0.0244×
Daniel QuattlebaumSC0048313SCSewage plant.95 MGDNitrogen, ammonia total [as N]monthly average 6 mg/L (Jan, Feb, Nov, Dec), tighterJan 1, 20310.1375 mg/L (4 values)0.0229×
Daniel QuattlebaumSC0048313SCSewage plant.95 MGDNitrogen, ammonia total [as N]weekly average 9 mg/L (Jan, Feb, Nov, Dec), tighterJan 1, 20310.2 mg/L (4 values)0.0222×
Daniel QuattlebaumSC0048313SCSewage plant.95 MGDNitrogen, ammonia total [as N]weekly average 6.15 mg/L (Mar–Oct), tighterJan 1, 20310.1 mg/L (7 values)0.0163×
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