Carmel Area Wastewater District — NPDES permit CA0047996: limits, due date and EPA's record

Sewage treatment plant, major discharger, Monterey County, California. NPDES permit CA0047996 expired Jul 10, 2019; its limits still apply. Last 12 months: over a limit 7 times (last March 2026), 1 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period ending	Parameter	Reported	Limit	Over by
October 2025	Solids, total suspended, highest weekly average	66.5 mg/L	≤ 45 mg/L	48%
March 2026	Benzidine, 30-day average	.02509 lb/d	≤ .00021 lb/d	11848%
March 2026	Chlordane [tech mix. and metabolites], 30-day average	< .00125 lb/d	≤ .00007 lb/d	1686%
March 2026	Hexachlorobenzene, 30-day average	< .01252 lb/d	≤ .00064 lb/d	1856%
March 2026	Polychlorinated biphenyls [PCBs], 30-day average	< .00627 lb/d	≤ .000058 lb/d	10711%
March 2026	Toxaphene, 30-day average	< .00627 lb/d	≤ .00064 lb/d	880%
March 2026	Tributyltin, 30-day average	< .0385 lb/d	≤ .0043 lb/d	795%

Limits in force (234)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. fahrenheit	instantaneous maximum	report only (deg F)	all year	001
Turbidity	monthly average	≤ 75 NTU	all year	001
Turbidity	highest weekly average	≤ 100 NTU	all year	001
Turbidity	instantaneous maximum	≤ 225 NTU	all year	001
Radioactivity	daily maximum	report only (pCi/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	≤ 45 mg/L	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 90 mg/L	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 750 lb/d	all year	001
BOD, 5-day, 20 deg. C	highest weekly average	≤ 1130 lb/d	all year	001
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	monthly average	≤ 30 mg/L	all year	001
Solids, total suspended	highest weekly average	≤ 45 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 90 mg/L	all year	001
Solids, total suspended	monthly average	≤ 750 lb/d	all year	001
Solids, total suspended	highest weekly average	≤ 1130 lb/d	all year	001
Solids, settleable	monthly average	≤ 1 mL/L	all year	001
Solids, settleable	highest weekly average	≤ 1.5 mL/L	all year	001
Solids, settleable	instantaneous maximum	≤ 3 mL/L	all year	001
Nitrogen, ammonia total [as N]	6-month median	≤ 73000 ug/L	all year	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 290000 ug/L	all year	001
Nitrogen, ammonia total [as N]	instantaneous maximum	≤ 730000 ug/L	all year	001
Nitrogen, ammonia total [as N]	6-month median	≤ 1800 lb/d	all year	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 7300 lb/d	all year	001
Nitrogen, nitrate total [as N]	daily maximum	report only (mg/L)	all year	001
Cyanide, total [as CN]	daily maximum	report only (ug/L)	all year	001
Silica, total [as SiO2]	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	30-day average	≤ 240 ug/L	all year	001
Thallium, total recoverable	30-day average	≤ 6.1 lb/d	all year	001
Beryllium, total recoverable [as Be]	30-day average	≤ 4 ug/L	all year	001
Beryllium, total recoverable [as Be]	30-day average	≤ .1 lb/d	all year	001
Chromium, hexavalent [as Cr]	6-month median	≤ 240 ug/L	all year	001
Chromium, hexavalent [as Cr]	daily maximum	≤ 980 ug/L	all year	001
Chromium, hexavalent [as Cr]	instantaneous maximum	≤ 2400 ug/L	all year	001
Chromium, hexavalent [as Cr]	6-month median	≤ 6.1 lb/d	all year	001
Chromium, hexavalent [as Cr]	daily maximum	≤ 24 lb/d	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	6-month median	≤ 66 ug/L	all year	001
Silver total recoverable	daily maximum	≤ 320 ug/L	all year	001
Silver total recoverable	instantaneous maximum	≤ 830 ug/L	all year	001
Silver total recoverable	6-month median	≤ 1.7 lb/d	all year	001
Silver total recoverable	daily maximum	≤ 8.1 lb/d	all year	001
Zinc, total recoverable	daily maximum	report only (ug/L)	all year	001
Cadmium, total recoverable	6-month median	≤ 120 ug/L	all year	001
Cadmium, total recoverable	daily maximum	≤ 490 ug/L	all year	001
Cadmium, total recoverable	instantaneous maximum	≤ 1200 ug/L	all year	001
Cadmium, total recoverable	6-month median	≤ 3.1 lb/d	all year	001
Cadmium, total recoverable	daily maximum	≤ 12 lb/d	all year	001
Lead, total recoverable	6-month median	≤ 240 ug/L	all year	001
Lead, total recoverable	daily maximum	≤ 980 ug/L	all year	001
Lead, total recoverable	instantaneous maximum	≤ 2400 ug/L	all year	001
Lead, total recoverable	6-month median	≤ 6.1 lb/d	all year	001
Lead, total recoverable	daily maximum	≤ 24 lb/d	all year	001
Copper, total recoverable	daily maximum	report only (ug/L)	all year	001
Antimony, total recoverable	daily maximum	report only (ug/L)	all year	001
Oil and grease	monthly average	≤ 25 mg/L	all year	001
Oil and grease	highest weekly average	≤ 40 mg/L	all year	001
Oil and grease	daily maximum	≤ 75 mg/L	all year	001
Oil and grease	monthly average	≤ 630 lb/d	all year	001
Oil and grease	highest weekly average	≤ 1000 lb/d	all year	001
2-Methyl-4,6-dinitrophenol	30-day average	≤ 27000 ug/L	all year	001
2-Methyl-4,6-dinitrophenol	30-day average	≤ 670 lb/d	all year	001
Tributyltin	30-day average	≤ .17 ug/L	all year	001
Tributyltin	30-day average	≤ .0043 lb/d	all year	001
Polynuclear Aromatic Hydrocarbons [PAHs]	30-day average	≤ 1.1 ug/L	all year	001
Polynuclear Aromatic Hydrocarbons [PAHs]	30-day average	≤ .027 lb/d	all year	001
Dichlorobromomethane	daily maximum	report only (ug/L)	all year	001
Carbon tetrachloride	30-day average	≤ 110 ug/L	all year	001
Carbon tetrachloride	30-day average	≤ 2.7 lb/d	all year	001
1,2-Dichloroethane	30-day average	≤ 3400 ug/L	all year	001
1,2-Dichloroethane	30-day average	≤ 85 lb/d	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	30-day average	≤ 720 ug/L	all year	001
Benzene	30-day average	≤ 18 lb/d	all year	001
Acrolein	30-day average	≤ 27000 ug/L	all year	001
Acrolein	30-day average	≤ 670 lb/d	all year	001
Acrylonitrile	30-day average	≤ 12 ug/L	all year	001
Acrylonitrile	30-day average	≤ .31 lb/d	all year	001
Bis[2-chloroethyl] ether	30-day average	≤ 5.5 ug/L	all year	001
Bis[2-chloroethyl] ether	30-day average	≤ .14 lb/d	all year	001
Bis[2-chloroethoxy]methane	30-day average	≤ 540 ug/L	all year	001
Bis[2-chloroethoxy]methane	30-day average	≤ 13 lb/d	all year	001
Bis[2-chloroisopropyl] ether	30-day average	≤ 150000 ug/L	all year	001
Bis[2-chloroisopropyl] ether	30-day average	≤ 3700 lb/d	all year	001
Chlorobenzene	30-day average	≤ 70000 ug/L	all year	001
Chlorobenzene	30-day average	≤ 1700 lb/d	all year	001
Diethyl phthalate	30-day average	≤ 4000000 ug/L	all year	001
Diethyl phthalate	30-day average	≤ 100000 lb/d	all year	001
Dimethyl phthalate	30-day average	≤ 100000 mg/L	all year	001
Dimethyl phthalate	30-day average	≤ 2500000 lb/d	all year	001
1,2-Diphenylhydrazine	30-day average	≤ 20 ug/L	all year	001
1,2-Diphenylhydrazine	30-day average	≤ .49 lb/d	all year	001
Ethylbenzene	30-day average	≤ 500000 ug/L	all year	001
Ethylbenzene	30-day average	≤ 13000 lb/d	all year	001
Fluoranthene	30-day average	≤ 1800 ug/L	all year	001
Fluoranthene	30-day average	≤ 46 lb/d	all year	001
Hexachlorocyclopentadiene	30-day average	≤ 7100 ug/L	all year	001
Hexachlorocyclopentadiene	30-day average	≤ 180 lb/d	all year	001
Hexachlorobutadiene	30-day average	≤ 1700 ug/L	all year	001
Hexachlorobutadiene	30-day average	≤ 43 lb/d	all year	001
Hexachloroethane	30-day average	≤ 310 ug/L	all year	001
Hexachloroethane	30-day average	≤ 7.6 lb/d	all year	001
Isophorone	30-day average	≤ 89000 ug/L	all year	001
Isophorone	30-day average	≤ 2200 lb/d	all year	001
Methylene chloride	30-day average	≤ 55000 ug/L	all year	001
Methylene chloride	30-day average	≤ 1400 lb/d	all year	001
N-Nitrosodi-N-propylamine	30-day average	≤ 46 ug/L	all year	001
N-Nitrosodi-N-propylamine	30-day average	≤ 1.2 lb/d	all year	001
N-Nitrosodiphenylamine	30-day average	≤ 310 ug/L	all year	001
N-Nitrosodiphenylamine	30-day average	≤ 7.6 lb/d	all year	001
N-Nitrosodimethylamine [NDMA]	30-day average	≤ 890 ug/L	all year	001
N-Nitrosodimethylamine [NDMA]	30-day average	≤ 22 lb/d	all year	001
Nitrobenzene	30-day average	≤ 500 ug/L	all year	001
Nitrobenzene	30-day average	≤ 15 lb/d	all year	001
Tetrachloroethylene	30-day average	≤ 240 ug/L	all year	001
Tetrachloroethylene	30-day average	≤ 6.1 lb/d	all year	001
1,1-Dichloroethylene	30-day average	≤ 110 ug/L	all year	001
1,1-Dichloroethylene	30-day average	≤ 2.7 lb/d	all year	001
1,1,1-Trichloroethane	30-day average	≤ 66000000 ug/L	all year	001
1,1,1-Trichloroethane	30-day average	≤ 1600000 lb/d	all year	001
1,1,2-Trichloroethane	30-day average	≤ 1100 ug/L	all year	001
1,1,2-Trichloroethane	30-day average	≤ 29 lb/d	all year	001
1,1,2,2-Tetrachloroethane	30-day average	≤ 280 ug/L	all year	001
1,1,2,2-Tetrachloroethane	30-day average	≤ 7 lb/d	all year	001
1,4-Dichlorobenzene	30-day average	≤ 2200 ug/L	all year	001
1,4-Dichlorobenzene	30-day average	≤ 55 lb/d	all year	001
2,4-Dinitrotoluene	30-day average	≤ 320 ug/L	all year	001
2,4-Dinitrotoluene	30-day average	≤ 7.9 lb/d	all year	001
2,4-Dinitrophenol	30-day average	≤ 490 ug/L	all year	001
2,4-Dinitrophenol	30-day average	≤ 12 lb/d	all year	001
2,4,6-Trichlorophenol	30-day average	≤ 35 ug/L	all year	001
2,4,6-Trichlorophenol	30-day average	≤ .89 lb/d	all year	001
3,3'-Dichlorobenzidine	30-day average	≤ .99 ug/L	all year	001
3,3'-Dichlorobenzidine	30-day average	≤ .025 lb/d	all year	001
Di[2-ethylhexyl] phthalate [DEHP]	30-day average	≤ 430 ug/L	all year	001
Di[2-ethylhexyl] phthalate [DEHP]	30-day average	≤ 11 lb/d	all year	001
Di-n-butyl phthalate	30-day average	≤ 430000 ug/L	all year	001
Di-n-butyl phthalate	30-day average	≤ 11000 lb/d	all year	001
Benzidine	30-day average	≤ .0084 ug/L	all year	001
Benzidine	30-day average	≤ .00021 lb/d	all year	001
Vinyl chloride	30-day average	≤ 4400 ug/L	all year	001
Vinyl chloride	30-day average	≤ 110 lb/d	all year	001
Trichloroethylene	30-day average	≤ 3300 ug/L	all year	001
Trichloroethylene	30-day average	≤ 82 lb/d	all year	001
Aldrin	30-day average	≤ .0027 ug/L	all year	001
Aldrin	30-day average	≤ .000067 lb/d	all year	001
Chlordane [tech mix. and metabolites]	30-day average	≤ .0028 ug/L	all year	001
Chlordane [tech mix. and metabolites]	30-day average	≤ .00007 lb/d	all year	001
DDT/DDD/DDE, sum of p,p' & o,p' isomers	30-day average	≤ .021 ug/L	all year	001
DDT/DDD/DDE, sum of p,p' & o,p' isomers	30-day average	≤ .00052 lb/d	all year	001
Dieldrin	30-day average	≤ .0049 ug/L	all year	001
Dieldrin	30-day average	≤ .00012 lb/d	all year	001
Endosulfan, total	6-month median	≤ 1.1 ug/L	all year	001
Endosulfan, total	daily maximum	≤ 2.2 ug/L	all year	001
Endosulfan, total	instantaneous maximum	≤ 3.3 ug/L	all year	001
Endosulfan, total	6-month median	≤ .027 lb/d	all year	001
Endosulfan, total	daily maximum	≤ .055 lb/d	all year	001
Endrin	6-month median	≤ .24 ug/L	all year	001
Endrin	daily maximum	≤ .49 ug/L	all year	001
Endrin	instantaneous maximum	≤ .73 ug/L	all year	001
Endrin	6-month median	≤ .0061 lb/d	all year	001
Endrin	daily maximum	≤ .012 lb/d	all year	001
Toxaphene	30-day average	≤ .026 ug/L	all year	001
Toxaphene	30-day average	≤ .00064 lb/d	all year	001
Heptachlor	30-day average	≤ .0061 ug/L	all year	001
Heptachlor	30-day average	≤ .00015 lb/d	all year	001
Heptachlor epoxide	30-day average	≤ .0024 ug/L	all year	001
Heptachlor epoxide	30-day average	≤ .000061 lb/d	all year	001
Polychlorinated biphenyls [PCBs]	30-day average	≤ .0023 ug/L	all year	001
Polychlorinated biphenyls [PCBs]	30-day average	≤ .000058 lb/d	all year	001
Hexachlorobenzene	30-day average	≤ .026 ug/L	all year	001
Hexachlorobenzene	30-day average	≤ .00064 lb/d	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	6-month median	≤ 240 ug/L	all year	001
Chlorine, total residual	daily maximum	≤ 980 ug/L	all year	001
Chlorine, total residual	instantaneous maximum	≤ 7300 ug/L	all year	001
Chlorine, total residual	6-month median	≤ 6.1 lb/d	all year	001
Chlorine, total residual	daily maximum	≤ 24 lb/d	all year	001
Enterococci	monthly average	≤ 4300 MPN/100mL	all year	001
Enterococci	instantaneous maximum	≤ 13000 MPN/100mL	all year	001
Solids, total dissolved	daily maximum	report only (mg/L)	all year	001
Urea	daily maximum	report only (mg/L)	all year	001
Mercury, total recoverable	6-month median	≤ 4.8 ug/L	all year	001
Mercury, total recoverable	daily maximum	≤ 19 ug/L	all year	001
Mercury, total recoverable	instantaneous maximum	≤ 49 ug/L	all year	001
Mercury, total recoverable	6-month median	≤ .12 lb/d	all year	001
Mercury, total recoverable	daily maximum	≤ .49 lb/d	all year	001
Phenols, chlorinated	6-month median	≤ 120 ug/L	all year	001
Phenols, chlorinated	daily maximum	≤ 490 ug/L	all year	001
Phenols, chlorinated	instantaneous maximum	≤ 1200 ug/L	all year	001
Phenols, chlorinated	6-month median	≤ 3.1 lb/d	all year	001
Phenols, chlorinated	daily maximum	≤ 12 lb/d	all year	001
Coliform, fecal general	monthly average	≤ 24000 MPN/100mL	all year	001
Coliform, fecal general	instantaneous maximum	≤ 49000 MPN/100mL	all year	001
Coliform, total general	monthly average	≤ 230 MPN/100mL	all year	001
Coliform, total general	instantaneous maximum	≤ 10000 MPN/100mL	all year	001
1,3-Dichloropropene	30-day average	≤ 1100 ug/L	all year	001
1,3-Dichloropropene	30-day average	≤ 27 lb/d	all year	001
Hexachlorocyclohexane, total	6-month median	≤ .49 ug/L	all year	001
Hexachlorocyclohexane, total	daily maximum	≤ .98 ug/L	all year	001
Hexachlorocyclohexane, total	instantaneous maximum	≤ 1.5 ug/L	all year	001
Hexachlorocyclohexane, total	6-month median	≤ .012 lb/d	all year	001
Hexachlorocyclohexane, total	daily maximum	≤ .024 lb/d	all year	001
Phenolic compounds, unchlorinated	6-month median	≤ 3700 ug/L	all year	001
Phenolic compounds, unchlorinated	daily maximum	≤ 15000 ug/L	all year	001
Phenolic compounds, unchlorinated	instantaneous maximum	≤ 37000 ug/L	all year	001
Phenolic compounds, unchlorinated	6-month median	≤ 92 lb/d	all year	001
Phenolic compounds, unchlorinated	daily maximum	≤ 370 lb/d	all year	001
Halomethanes	30-day average	≤ 16000 ug/L	all year	001
Halomethanes	30-day average	≤ 400 lb/d	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
Dichlorobenzene	30-day average	≤ 620000 ug/L	all year	001
Dichlorobenzene	30-day average	≤ 16000 lb/d	all year	001
TCDD equivalents	30-day average	≤ .00000048 ug/L	all year	001
TCDD equivalents	30-day average	≤ .000012 Tthlb/d	all year	001
TU Static Renewal 96Hr Acute Menidia beryllina	daily maximum	≤ 3.9 tox acute	all year	001
TU Static 72Hr Chronic Strongyl. purpuratus	daily maximum	≤ 120 tox chronic	all year	001
TU Static 48Hr Chronic Macrocystis pyrifera	daily maximum	≤ 120 tox chronic	all year	001
TU Static 48Hr Chronic Haliotis rufescens	daily maximum	≤ 120 tox chronic	all year	001
Toxic Units Static Renewal 7-Day Chronic Atherinops affinis	daily maximum	≤ 120 tox chronic	all year	001
BOD, 5-day, 20 deg. C	monthly average	report only (mg/L)	all year	INF
BOD, 5-day, 20 deg. C	daily maximum	report only (mg/L)	all year	INF
Solids, total suspended	monthly average	report only (mg/L)	all year	INF
Solids, total suspended	daily maximum	report only (mg/L)	all year	INF
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	INF
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	INF

How strict are these limits?

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