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Sewage treatment plant, major discharger, Lake Elsinore, California. NPDES permit CA8000188 expired Sep 30, 2020; its limits still apply. Last 12 months: over a limit 9 times (last March 2026), 17 of 195 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Solids, total dissolved, 12-month average | 702 mg/L | ≤ 650 mg/L | 8% |
| January 2026 | Solids, total dissolved, 12-month average | 662 mg/L | ≤ 250 mg/L | 165% |
| January 2026 | Solids, total dissolved, 12-month average | 662 mg/L | ≤ 650 mg/L | 2% |
| February 2026 | Mercury, total recoverable, daily maximum | < 1.5 ug/L | ≤ .103 ug/L | 1356% |
| February 2026 | Mercury, total recoverable, monthly average | < 1.5 ug/L | ≤ .051 ug/L | 2841% |
| February 2026 | Solids, total dissolved, 12-month average | 674 mg/L | ≤ 650 mg/L | 4% |
| February 2026 | pH, minimum | 6.46 SU | ≥ 6.5 SU | — |
| March 2026 | Cyanide, free available, monthly average | 4.5 ug/L | ≤ 4.2 ug/L | 7% |
| March 2026 | Dichlorobromomethane, monthly average | 62 ug/L | ≤ 46 ug/L | 35% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | instantaneous maximum | report only (deg C) | all year | 001 |
| Specific conductance | monthly average | report only (umho/cm) | all year | 001 |
| Specific conductance | daily maximum | report only (umho/cm) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | highest weekly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | highest weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 8757 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 13136 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | highest weekly average | ≤ 13136 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | highest weekly average | ≤ 19703 lb/d | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | highest weekly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | highest weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 8757 lb/d | all year | 001 |
| Solids, total suspended | monthly average | ≤ 13136 lb/d | all year | 001 |
| Solids, total suspended | highest weekly average | ≤ 13136 lb/d | all year | 001 |
| Solids, total suspended | highest weekly average | ≤ 19703 lb/d | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.5 mg/L | all year | 001 |
| Nitrogen, inorganic total | 12-month average | ≤ 10 mg/L | all year | 001 |
| Nitrogen, inorganic total | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Thallium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, trivalent [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total recoverable | monthly average | ≤ 3.6 ug/L | all year | 001 |
| Lead, total recoverable | daily maximum | ≤ 6.7 ug/L | all year | 001 |
| Copper, total recoverable | monthly average | ≤ 12.1 ug/L | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ 18.3 ug/L | all year | 001 |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| 2-Methyl-4,6-dinitrophenol | daily maximum | report only (ug/L) | all year | 001 |
| Dichlorobromomethane | monthly average | ≤ 46 ug/L | all year | 001 |
| Dichlorobromomethane | daily maximum | ≤ 75 ug/L | all year | 001 |
| Carbon tetrachloride | daily maximum | report only (ug/L) | all year | 001 |
| 1,2-Dichloroethane | daily maximum | report only (ug/L) | all year | 001 |
| Bromoform | daily maximum | report only (ug/L) | all year | 001 |
| Dibromochloromethane | daily maximum | report only (ug/L) | all year | 001 |
| Chloroform | daily maximum | report only (ug/L) | all year | 001 |
| Toluene | daily maximum | report only (ug/L) | all year | 001 |
| Benzene | daily maximum | report only (ug/L) | all year | 001 |
| .delta.-BHC | daily maximum | report only (ug/L) | all year | 001 |
| Acenaphthylene | daily maximum | report only (ug/L) | all year | 001 |
| Acenaphthene | daily maximum | report only (ug/L) | all year | 001 |
| Acrolein | daily maximum | report only (ug/L) | all year | 001 |
| Acrylonitrile | daily maximum | report only (ug/L) | all year | 001 |
| Anthracene | daily maximum | report only (ug/L) | all year | 001 |
| Benzo[b]fluoranthene | daily maximum | report only (ug/L) | all year | 001 |
| Benzo[k]fluoranthene | daily maximum | report only (ug/L) | all year | 001 |
| Benzo[a]pyrene | daily maximum | report only (ug/L) | all year | 001 |
| Bis[2-chloroethyl] ether | daily maximum | report only (ug/L) | all year | 001 |
| Bis[2-chloroethoxy]methane | daily maximum | report only (ug/L) | all year | 001 |
| Bis[2-chloroisopropyl] ether | daily maximum | report only (ug/L) | all year | 001 |
| Butyl benzyl phthalate | daily maximum | report only (ug/L) | all year | 001 |
| Chlorobenzene | daily maximum | report only (ug/L) | all year | 001 |
| Chrysene | daily maximum | report only (ug/L) | all year | 001 |
| Diethyl phthalate | daily maximum | report only (ug/L) | all year | 001 |
| Dimethyl phthalate | daily maximum | report only (ug/L) | all year | 001 |
| 1,2-Diphenylhydrazine | daily maximum | report only (ug/L) | all year | 001 |
| Endosulfan sulfate | daily maximum | report only (ug/L) | all year | 001 |
| .beta.-Endosulfan | daily maximum | report only (ug/L) | all year | 001 |
| .alpha.-Endosulfan | daily maximum | report only (ug/L) | all year | 001 |
| Endrin aldehyde | daily maximum | report only (ug/L) | all year | 001 |
| Ethylbenzene | daily maximum | report only (ug/L) | all year | 001 |
| Fluoranthene | daily maximum | report only (ug/L) | all year | 001 |
| Fluorene | daily maximum | report only (ug/L) | all year | 001 |
| Hexachlorocyclopentadiene | daily maximum | report only (ug/L) | all year | 001 |
| Hexachlorobutadiene | daily maximum | report only (ug/L) | all year | 001 |
| Hexachloroethane | daily maximum | report only (ug/L) | all year | 001 |
| Indeno[1,2,3-cd]pyrene | daily maximum | report only (ug/L) | all year | 001 |
| Isophorone | daily maximum | report only (ug/L) | all year | 001 |
| Methyl bromide [Bromomethane] | daily maximum | report only (ug/L) | all year | 001 |
| Methyl chloride [Chloromethane] | daily maximum | report only (ug/L) | all year | 001 |
| Methylene chloride | daily maximum | report only (ug/L) | all year | 001 |
| N-Nitrosodi-N-propylamine | daily maximum | report only (ug/L) | all year | 001 |
| N-Nitrosodiphenylamine | daily maximum | report only (ug/L) | all year | 001 |
| N-Nitrosodimethylamine [NDMA] | daily maximum | report only (ug/L) | all year | 001 |
| Nitrobenzene | daily maximum | report only (ug/L) | all year | 001 |
| Phenanthrene | daily maximum | report only (ug/L) | all year | 001 |
| Pyrene | daily maximum | report only (ug/L) | all year | 001 |
| Tetrachloroethylene | daily maximum | report only (ug/L) | all year | 001 |
| 1,1-Dichloroethane | daily maximum | report only (ug/L) | all year | 001 |
| 1,1-Dichloroethylene | daily maximum | report only (ug/L) | all year | 001 |
| 1,1,1-Trichloroethane | daily maximum | report only (ug/L) | all year | 001 |
| 1,1,2-Trichloroethane | daily maximum | report only (ug/L) | all year | 001 |
| 1,1,2,2-Tetrachloroethane | daily maximum | report only (ug/L) | all year | 001 |
| Benzo[ghi]perylene | daily maximum | report only (ug/L) | all year | 001 |
| Benzo[a]anthracene | daily maximum | report only (ug/L) | all year | 001 |
| 1,2-Dichlorobenzene | daily maximum | report only (ug/L) | all year | 001 |
| 1,2-Dichloropropane | daily maximum | report only (ug/L) | all year | 001 |
| trans-1,2-Dichloroethylene | daily maximum | report only (ug/L) | all year | 001 |
| 1,2,4-Trichlorobenzene | daily maximum | report only (ug/L) | all year | 001 |
| Dibenz[a,h]anthracene | daily maximum | report only (ug/L) | all year | 001 |
| 1,3-Dichlorobenzene | daily maximum | report only (ug/L) | all year | 001 |
| 1,4-Dichlorobenzene | daily maximum | report only (ug/L) | all year | 001 |
| 2-Chloroethyl vinyl ether, [mixed] | daily maximum | report only (ug/L) | all year | 001 |
| 2-Chloronaphthalene | daily maximum | report only (ug/L) | all year | 001 |
| 2-Chlorophenol | daily maximum | report only (ug/L) | all year | 001 |
| 2-Nitrophenol | daily maximum | report only (ug/L) | all year | 001 |
| Di-n-octyl phthalate | daily maximum | report only (ug/L) | all year | 001 |
| 2,4-Dichlorophenol | daily maximum | report only (ug/L) | all year | 001 |
| 2,4-Dimethylphenol | daily maximum | report only (ug/L) | all year | 001 |
| 2,4-Dinitrotoluene | daily maximum | report only (ug/L) | all year | 001 |
| 2,4-Dinitrophenol | daily maximum | report only (ug/L) | all year | 001 |
| 2,4,6-Trichlorophenol | daily maximum | report only (ug/L) | all year | 001 |
| 2,6-Dinitrotoluene | daily maximum | report only (ug/L) | all year | 001 |
| 3,3'-Dichlorobenzidine | daily maximum | report only (ug/L) | all year | 001 |
| 4-Bromophenyl phenyl ether | daily maximum | report only (ug/L) | all year | 001 |
| 4-Chlorophenyl phenyl ether | daily maximum | report only (ug/L) | all year | 001 |
| 4-Nitrophenol | daily maximum | report only (ug/L) | all year | 001 |
| PCB-1016 | daily maximum | report only (ug/L) | all year | 001 |
| 2,3,7,8-Tetrachlorodibenzo-p-dioxin | daily maximum | report only (ug/L) | all year | 001 |
| Phenol | daily maximum | report only (ug/L) | all year | 001 |
| Naphthalene | daily maximum | report only (ug/L) | all year | 001 |
| Pentachlorophenol | daily maximum | report only (ug/L) | all year | 001 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | report only (ug/L) | all year | 001 |
| Di-n-butyl phthalate | daily maximum | report only (ug/L) | all year | 001 |
| Benzidine | daily maximum | report only (ug/L) | all year | 001 |
| Vinyl chloride | daily maximum | report only (ug/L) | all year | 001 |
| Trichloroethylene | daily maximum | report only (ug/L) | all year | 001 |
| 4,4'-DDT | daily maximum | report only (ug/L) | all year | 001 |
| 4,4'-DDD | daily maximum | report only (ug/L) | all year | 001 |
| 4,4'-DDE | daily maximum | report only (ug/L) | all year | 001 |
| Aldrin | daily maximum | report only (ug/L) | all year | 001 |
| .alpha.-BHC | daily maximum | report only (ug/L) | all year | 001 |
| .beta.-BHC | daily maximum | report only (ug/L) | all year | 001 |
| .gamma.-BHC | daily maximum | report only (ug/L) | all year | 001 |
| Chlordane [tech mix. and metabolites] | daily maximum | report only (ug/L) | all year | 001 |
| Dieldrin | daily maximum | report only (ug/L) | all year | 001 |
| Endrin | daily maximum | report only (ug/L) | all year | 001 |
| Toxaphene | daily maximum | report only (ug/L) | all year | 001 |
| Heptachlor | daily maximum | report only (ug/L) | all year | 001 |
| Heptachlor epoxide | daily maximum | report only (ug/L) | all year | 001 |
| PCB-1221 | daily maximum | report only (ug/L) | all year | 001 |
| PCB-1232 | daily maximum | report only (ug/L) | all year | 001 |
| PCB-1242 | daily maximum | report only (ug/L) | all year | 001 |
| PCB-1248 | daily maximum | report only (ug/L) | all year | 001 |
| PCB-1254 | daily maximum | report only (ug/L) | all year | 001 |
| PCB-1260 | daily maximum | report only (ug/L) | all year | 001 |
| Hexachlorobenzene | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | monthly average | report only (mg/L) | all year | 001 |
| Chlorine, total residual | maximum | ≤ 5 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, free available | monthly average | ≤ 4.2 ug/L | all year | 001 |
| Cyanide, free available | daily maximum | ≤ 8.4 ug/L | all year | 001 |
| 4-Chloro-3-methylphenol | daily maximum | report only (ug/L) | all year | 001 |
| Solids, total dissolved | 12-month average | ≤ 650 mg/L | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | 12-month average | ≤ 250 mg/L | all year | 001 |
| Mercury, total recoverable | monthly average | ≤ .051 ug/L | all year | 001 |
| Mercury, total recoverable | daily maximum | ≤ .103 ug/L | all year | 001 |
| 1,3-Dichloropropene | daily maximum | report only (ug/L) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Chloroethane | daily maximum | report only (ug/L) | all year | 001 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | average | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | daily maximum | report only (tox chronic) | all year | 001 |
| Turbidity | maximum daily average | ≤ 2 NTU | all year | 002 |
| Turbidity | maximum daily average | report only (NTU) | all year | 002 |
| Turbidity | instantaneous maximum | ≤ 10 NTU | all year | 002 |
| Turbidity, time above limit | maximum | ≤ 72 min/d | all year | 002 |
| Coliform, total general | 7-day median | ≤ 2.2 MPN/100mL | all year | 002 |
| Coliform, total general | 7-day median | ≤ 23 MPN/100mL | all year | 002 |
| Coliform, total general | instantaneous maximum | ≤ 240 MPN/100mL | all year | 002 |
| Turbidity | maximum daily average | ≤ 2 NTU | all year | 003 |
| Turbidity | maximum daily average | report only (NTU) | all year | 003 |
| Turbidity | instantaneous maximum | ≤ 10 NTU | all year | 003 |
| Turbidity, time above limit | maximum | ≤ 72 min/d | all year | 003 |
| Coliform, total general | 7-day median | ≤ 2.2 MPN/100mL | all year | 003 |
| Coliform, total general | 7-day median | ≤ 23 MPN/100mL | all year | 003 |
| Coliform, total general | instantaneous maximum | ≤ 240 MPN/100mL | all year | 003 |
| Turbidity | maximum daily average | ≤ 2 NTU | all year | 004A |
| Turbidity | maximum daily average | report only (NTU) | all year | 004A |
| Turbidity | instantaneous maximum | ≤ 10 NTU | all year | 004A |
| Turbidity, time above limit | maximum | ≤ 72 min/d | all year | 004A |
| Coliform, total general | 7-day median | ≤ 2.2 MPN/100mL | all year | 004A |
| Coliform, total general | 7-day median | ≤ 23 MPN/100mL | all year | 004A |
| Coliform, total general | instantaneous maximum | ≤ 240 MPN/100mL | all year | 004A |
| Turbidity | maximum daily average | report only (NTU) | all year | 004B |
| Turbidity | maximum daily average | ≤ 2 NTU | all year | 004B |
| Turbidity | instantaneous maximum | ≤ 10 NTU | all year | 004B |
| Turbidity, time above limit | maximum | ≤ 72 min/d | all year | 004B |
| Coliform, total general | 7-day median | ≤ 23 MPN/100mL | all year | 004B |
| Coliform, total general | 7-day median | ≤ 2.2 MPN/100mL | all year | 004B |
| Coliform, total general | instantaneous maximum | ≤ 240 MPN/100mL | all year | 004B |
| Turbidity | maximum daily average | report only (NTU) | all year | 005 |
| Turbidity | maximum daily average | ≤ 2 NTU | all year | 005 |
| Turbidity | instantaneous maximum | ≤ 10 NTU | all year | 005 |
| Turbidity, time above limit | maximum | ≤ 72 min/d | all year | 005 |
| Coliform, total general | 7-day median | ≤ 23 MPN/100mL | all year | 005 |
| Coliform, total general | 7-day median | ≤ 2.2 MPN/100mL | all year | 005 |
| Coliform, total general | instantaneous maximum | ≤ 240 MPN/100mL | all year | 005 |
| Turbidity | maximum daily average | ≤ 2 NTU | all year | 006 |
| Turbidity | maximum daily average | report only (NTU) | all year | 006 |
| Turbidity | instantaneous maximum | ≤ 10 NTU | all year | 006 |
| Turbidity, time above limit | maximum | ≤ 72 min/d | all year | 006 |
| Coliform, total general | 7-day median | ≤ 2.2 MPN/100mL | all year | 006 |
| Coliform, total general | 7-day median | ≤ 23 MPN/100mL | all year | 006 |
| Coliform, total general | instantaneous maximum | ≤ 240 MPN/100mL | all year | 006 |
| Turbidity | maximum daily average | ≤ 2 NTU | all year | 007 |
| Turbidity | maximum daily average | report only (NTU) | all year | 007 |
| Turbidity | instantaneous maximum | ≤ 10 NTU | all year | 007 |
| Turbidity, time above limit | maximum | ≤ 72 min/d | all year | 007 |
| Coliform, total general | 7-day median | ≤ 2.2 MPN/100mL | all year | 007 |
| Coliform, total general | 7-day median | ≤ 23 MPN/100mL | all year | 007 |
| Coliform, total general | instantaneous maximum | ≤ 240 MPN/100mL | all year | 007 |
Cited limits by parameter: California's rules and the federal ones.
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