Avila Beach CSD and Port San Luis Harbor District — NPDES permit CA0047830: limits, due date and EPA's record

Sewage treatment plant, Avila Beach, California. NPDES permit CA0047830 expired Nov 30, 2022; its limits still apply. Last 12 months: no values over a limit, 3 of 21 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (198)

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	weekly average	≤ 100 NTU	all year	001
Turbidity	daily maximum	≤ 225 NTU	all year	001
Radioactivity	daily maximum	report only (pCi/L)	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 40 mg/L	all year	001
BOD, 5-day, 20 deg. C	weekly average	≤ 60 mg/L	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 90 mg/L	all year	001
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	monthly average	≤ 40 mg/L	all year	001
Solids, total suspended	weekly average	≤ 60 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 90 mg/L	all year	001
Solids, settleable	monthly average	≤ 1 mL/L	all year	001
Solids, settleable	weekly average	≤ 1.5 mL/L	all year	001
Solids, settleable	daily maximum	≤ 3 mL/L	all year	001
Nitrogen, ammonia total [as N]	6-month median	≤ 91000 ug/L	all year	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 360000 ug/L	all year	001
Nitrogen, ammonia total [as N]	instantaneous maximum	≤ 910000 ug/L	all year	001
Cyanide, total [as CN]	6-month median	≤ 150 ug/L	all year	001
Cyanide, total [as CN]	daily maximum	≤ 610 ug/L	all year	001
Cyanide, total [as CN]	instantaneous maximum	≤ 1500 ug/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	monthly average	≤ 300 ug/L	all year	001
Beryllium, total recoverable [as Be]	monthly average	≤ 5 ug/L	all year	001
Chromium, hexavalent [as Cr]	6-month median	≤ 300 ug/L	all year	001
Chromium, hexavalent [as Cr]	daily maximum	≤ 1200 ug/L	all year	001
Chromium, hexavalent [as Cr]	instantaneous maximum	≤ 3000 ug/L	all year	001
Chromium, trivalent [as Cr]	monthly average	≤ 29000000 ug/L	all year	001
Nickel, total recoverable	daily maximum	report only (ug/L)	all year	001
Silver total recoverable	6-month median	≤ 82 ug/L	all year	001
Silver total recoverable	daily maximum	≤ 400 ug/L	all year	001
Silver total recoverable	instantaneous maximum	≤ 1000 ug/L	all year	001
Zinc, total recoverable	6-month median	≤ 1800 ug/L	all year	001
Zinc, total recoverable	daily maximum	≤ 11000 ug/L	all year	001
Zinc, total recoverable	instantaneous maximum	≤ 29000 ug/L	all year	001
Cadmium, total recoverable	6-month median	≤ 150 ug/L	all year	001
Cadmium, total recoverable	daily maximum	≤ 610 ug/L	all year	001
Cadmium, total recoverable	instantaneous maximum	≤ 1500 ug/L	all year	001
Lead, total recoverable	6-month median	≤ 300 ug/L	all year	001
Lead, total recoverable	daily maximum	≤ 1200 ug/L	all year	001
Lead, total recoverable	instantaneous maximum	≤ 3000 ug/L	all year	001
Copper, total recoverable	6-month median	≤ 150 ug/L	all year	001
Copper, total recoverable	daily maximum	≤ 1500 ug/L	all year	001
Copper, total recoverable	instantaneous maximum	≤ 4300 ug/L	all year	001
Antimony, total recoverable	monthly average	≤ 180000 ug/L	all year	001
Oil and grease	monthly average	≤ 25 mg/L	all year	001
Oil and grease	weekly average	≤ 40 mg/L	all year	001
Oil and grease	daily maximum	≤ 75 mg/L	all year	001
2-Methyl-4,6-dinitrophenol	monthly average	≤ 33000 ug/L	all year	001
Tributyltin	monthly average	≤ .21 ug/L	all year	001
Polynuclear Aromatic Hydrocarbons [PAHs]	monthly average	≤ 1.3 ug/L	all year	001
Dichlorobromomethane	monthly average	≤ 940 ug/L	all year	001
Carbon tetrachloride	monthly average	≤ 140 ug/L	all year	001
1,2-Dichloroethane	monthly average	≤ 4300 ug/L	all year	001
Bromoform	daily maximum	report only (ug/L)	all year	001
Dibromochloromethane	monthly average	≤ 1300 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	monthly average	≤ 900 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	monthly average	≤ 33000 ug/L	all year	001
Acrylonitrile	monthly average	≤ 15 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	monthly average	≤ 6.8 ug/L	all year	001
Bis[2-chloroethoxy]methane	monthly average	≤ 670 ug/L	all year	001
Bis[2-chloroisopropyl] ether	monthly average	≤ 180000 ug/L	all year	001
Butyl benzyl phthalate	daily maximum	report only (ug/L)	all year	001
Chlorobenzene	monthly average	≤ 87000 ug/L	all year	001
Chrysene	daily maximum	report only (ug/L)	all year	001
Diethyl phthalate	monthly average	≤ 5000000 ug/L	all year	001
Dimethyl phthalate	monthly average	≤ 120000 mg/L	all year	001
1,2-Diphenylhydrazine	monthly average	≤ 24 ug/L	all year	001
Ethylbenzene	monthly average	≤ 620000 ug/L	all year	001
Fluoranthene	monthly average	≤ 2300 ug/L	all year	001
Fluorene	daily maximum	report only (ug/L)	all year	001
Hexachlorocyclopentadiene	monthly average	≤ 8800 ug/L	all year	001
Hexachlorobutadiene	monthly average	≤ 2100 ug/L	all year	001
Hexachloroethane	monthly average	≤ 380 ug/L	all year	001
Indeno[1,2,3-cd]pyrene	daily maximum	report only (ug/L)	all year	001
Isophorone	monthly average	≤ 110000 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	monthly average	≤ 68000 ug/L	all year	001
N-Nitrosodi-N-propylamine	monthly average	≤ 58 ug/L	all year	001
N-Nitrosodiphenylamine	monthly average	≤ 380 ug/L	all year	001
N-Nitrosodimethylamine [NDMA]	monthly average	≤ 1100 ug/L	all year	001
Nitrobenzene	monthly average	≤ 740 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	monthly average	≤ 300 ug/L	all year	001
1,1-Dichloroethane	daily maximum	report only (ug/L)	all year	001
1,1-Dichloroethylene	monthly average	≤ 140 ug/L	all year	001
1,1,1-Trichloroethane	monthly average	≤ 82000000 ug/L	all year	001
1,1,2-Trichloroethane	monthly average	≤ 1400 ug/L	all year	001
1,1,2,2-Tetrachloroethane	monthly average	≤ 350 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-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
1,4-Dichlorobenzene	monthly average	≤ 2700 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	monthly average	≤ 400 ug/L	all year	001
2,4-Dinitrophenol	monthly average	≤ 610 ug/L	all year	001
2,4,6-Trichlorophenol	monthly average	≤ 44 ug/L	all year	001
2,6-Dinitrotoluene	daily maximum	report only (ug/L)	all year	001
3,3'-Dichlorobenzidine	monthly average	≤ 1.2 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
4,6-Dinitro-o-cresol	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]	monthly average	≤ 530 ug/L	all year	001
Di-n-butyl phthalate	monthly average	≤ 530000 ug/L	all year	001
Benzidine	monthly average	≤ .01 ug/L	all year	001
Vinyl chloride	monthly average	≤ 5500 ug/L	all year	001
Trichloroethylene	monthly average	≤ 4100 ug/L	all year	001
Aldrin	monthly average	≤ .0033 ug/L	all year	001
Chlordane [tech mix. and metabolites]	monthly average	≤ .0035 ug/L	all year	001
DDT/DDD/DDE, sum of p,p' & o,p' isomers	monthly average	≤ .026 ug/L	all year	001
Dieldrin	monthly average	≤ .0061 ug/L	all year	001
Endosulfan, total	6-month median	≤ 1.4 ug/L	all year	001
Endosulfan, total	daily maximum	≤ 2.7 ug/L	all year	001
Endosulfan, total	instantaneous maximum	≤ 4.1 ug/L	all year	001
Endrin	6-month median	≤ .3 ug/L	all year	001
Endrin	daily maximum	≤ .61 ug/L	all year	001
Endrin	instantaneous maximum	≤ .91 ug/L	all year	001
Toxaphene	monthly average	≤ .032 ug/L	all year	001
Heptachlor	monthly average	≤ .0076 ug/L	all year	001
Heptachlor epoxide	monthly average	≤ .003 ug/L	all year	001
Hexachlorobenzene	monthly average	≤ .032 ug/L	all year	001
Flow, in conduit or thru treatment plant	total	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	mean	report only (MGD)	all year	001
Chlorine, total residual	6-month median	≤ 300 ug/L	all year	001
Chlorine, total residual	daily maximum	≤ 1200 ug/L	all year	001
Chlorine, total residual	instantaneous maximum	≤ 9100 ug/L	all year	001
Polychlorinated biphenyls [PCBs], sum of Aroclors	monthly average	≤ .0029 ug/L	all year	001
Solids, total dissolved	daily maximum	report only (mg/L)	all year	001
Mercury, total recoverable	6-month median	≤ 6 ug/L	all year	001
Mercury, total recoverable	daily maximum	≤ 24 ug/L	all year	001
Mercury, total recoverable	instantaneous maximum	≤ 61 ug/L	all year	001
Phenols, chlorinated	6-month median	≤ 150 ug/L	all year	001
Phenols, chlorinated	daily maximum	≤ 610 ug/L	all year	001
Phenols, chlorinated	instantaneous maximum	≤ 1500 ug/L	all year	001
Coliform, total general	7-day median	≤ 23 MPN/100mL	all year	001
Coliform, total general	maximum single sample	≤ 2400 MPN/100mL	all year	001
1,3-Dichloropropene	monthly average	≤ 1400 ug/L	all year	001
Hexachlorocyclohexane, total	6-month median	≤ .61 ug/L	all year	001
Hexachlorocyclohexane, total	daily maximum	≤ 1.2 ug/L	all year	001
Hexachlorocyclohexane, total	instantaneous maximum	≤ 1.8 ug/L	all year	001
Phenolic compounds, unchlorinated	6-month median	≤ 4600 ug/L	all year	001
Phenolic compounds, unchlorinated	daily maximum	≤ 18000 ug/L	all year	001
Phenolic compounds, unchlorinated	instantaneous maximum	≤ 46000 ug/L	all year	001
Halomethanes	monthly average	≤ 20000 ug/L	all year	001
BOD, 5-day, percent removal	monthly average minimum	≥ 75 %	all year	001
Solids, suspended percent removal	monthly average minimum	≥ 75 %	all year	001
Dichlorobenzene	monthly average	≤ 780000 ug/L	all year	001
p-Chloro-m-cresol	daily maximum	report only (ug/L)	all year	001
TCDD equivalents	monthly average	≤ .00000059 ug/L	all year	001
Chloroethane	daily maximum	report only (ug/L)	all year	001
TU Static 96Hr Acute Americamysis bahia (formerly Mysidopsis bahia)	daily maximum	≤ 4.8 tox acute	all year	001
Static 96Hr Acute Holmesimysis costata	daily maximum	≤ 4.8 tox acute	all year	001
TU Static 96Hr Acute Cyprinodon variegatus	daily maximum	≤ 4.8 tox acute	all year	001
TU Static 96Hr Acute Medinia beryllina	daily maximum	≤ 4.8 tox acute	all year	001
TU Static 72Hr Chronic Strongyl. purpuratus	daily maximum	≤ 150 tox chronic	all year	001
Static 72Hr Chronic Dendraster excentricus	daily maximum	≤ 150 tox chronic	all year	001
TU Static 48Hr Chronic Macrocystis pyrifera	daily maximum	≤ 150 tox chronic	all year	001
TU Static 48Hr Chronic Crassostrea gigas	daily maximum	≤ 150 tox chronic	all year	001
TU Static 48Hr Chronic Haliotis rufescens	daily maximum	≤ 150 tox chronic	all year	001
Static 48Hr Chronic Mytilis Species	daily maximum	≤ 150 tox chronic	all year	001
TU Static Renewal 7-Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	daily maximum	≤ 150 tox chronic	all year	001
TU Static Renewal 7-Day Chronic Holmesimysis costata	daily maximum	≤ 150 tox chronic	all year	001
TU Static Renewal 7-Day Chronic Menidia beryllina	daily maximum	≤ 150 tox chronic	all year	001
Toxic Units Static Renewal 7-Day Chronic Atherinops affinis	daily maximum	≤ 150 tox chronic	all year	001
TU Static 20Min Chronic Strongyl. purpuratus	daily maximum	≤ 150 tox chronic	all year	001
Static 20Min Chronic Dendraster excentricus	daily maximum	≤ 150 tox chronic	all year	001
BOD, 5-day, 20 deg. C	monthly average	report only (mg/L)	all year	INF1
BOD, 5-day, 20 deg. C	daily maximum	report only (mg/L)	all year	INF1
Solids, total suspended	monthly average	report only (mg/L)	all year	INF1
Solids, total suspended	daily maximum	report only (mg/L)	all year	INF1
Volume, total	total	report only (gal)	all year	INF2
Volume, total	total	report only (gal)	all year	INF2

How strict are these limits?

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