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USS-POSCO Indiustries

Blast Furnaces And Steel Mills, major discharger, Pittsburg, California. NPDES permit CA0005002 expired Dec 31, 2021; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 32 days after each period: outfall 001 form A monthly (18 values), outfall 002 form A monthly (7 values), outfall INF1 form A monthly (1 value), outfall INF2 form A monthly (1 value), outfall 001 form Q quarterly, outfall 001 form S twice a year, and 4 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 128 required values missing, 0 of 59 reports late

Limits in force (205)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitinstantaneous maximum≤ 92 deg Fall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmonthly average≤ 31 mg/Lall year001
Solids, total suspendeddaily maximum≤ 60 mg/Lall year001
Solids, total suspendedmonthly average≤ 1100 lb/dall year001
Solids, total suspendeddaily maximum≤ 2600 lb/dall year001
Cyanide, total [as CN]monthly average≤ 6.8 ug/Lall year001
Cyanide, total [as CN]monthly average≤ 6.8 ug/Lall year001
Cyanide, total [as CN]daily maximum≤ 14 ug/Lall year001
Cyanide, total [as CN]daily maximum≤ 14 ug/Lall year001
Asbestosdaily maximumreport only (ct/L)all year001
Arsenic, total recoverabledaily maximumreport only (ug/L)all year001
Selenium, total recoverabledaily maximumreport only (ug/L)all year001
Thallium, total recoverabledaily maximumreport only (ug/L)all year001
Beryllium, total recoverable [as Be]daily maximumreport only (ug/L)all year001
Chromium, hexavalent [as Cr]daily maximumreport only (ug/L)all year001
Chromium, trivalent [as Cr]daily maximumreport only (ug/L)all year001
Nickel, total recoverablemonthly average≤ 7.3 ug/Lall year001
Nickel, total recoverabledaily maximum≤ 12 ug/Lall year001
Silver total recoverablemonthly average≤ 240 ug/Lall year001
Silver total recoverabledaily maximum≤ 430 ug/Lall year001
Zinc, total recoverablemonthly average≤ 1500 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 2600 ug/Lall year001
Zinc, total recoverablemonthly average≤ 4.6 lb/dall year001
Zinc, total recoverabledaily maximum≤ 14 lb/dall year001
Cadmium, total recoverablemonthly average≤ 260 ug/Lall year001
Cadmium, total recoverabledaily maximum≤ 690 ug/Lall year001
Lead, total recoverablemonthly average≤ 430 ug/Lall year001
Lead, total recoverabledaily maximum≤ 690 ug/Lall year001
Lead, total recoverablemonthly average≤ 3.9 lb/dall year001
Lead, total recoverabledaily maximum≤ 12 lb/dall year001
Chromium, total recoverablemonthly average≤ 1700 ug/Lall year001
Chromium, total recoverabledaily maximum≤ 2800 ug/Lall year001
Copper, total recoverablemonthly average≤ 3.3 ug/Lall year001
Copper, total recoverabledaily maximum≤ 5.5 ug/Lall year001
Copper, total recoverabledaily maximumreport only (ug/L)all year001
Antimony, total recoverabledaily maximumreport only (ug/L)all year001
Oil and greasemonthly average≤ 10 mg/Lall year001
Oil and greasemonthly average≤ 10 mg/Lall year001
Oil and greasedaily maximum≤ 20 mg/Lall year001
Oil and greasedaily maximum≤ 20 mg/Lall year001
Oil and greasemonthly average≤ 250 lb/dall year001
Oil and greasemonthly average≤ 250 lb/dall year001
Oil and greasedaily maximum≤ 720 lb/dall year001
Oil and greasedaily maximum≤ 720 lb/dall year001
2-Methyl-4,6-dinitrophenoldaily maximumreport only (ug/L)all year001
1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxindaily maximumreport only (ng/L)all year001
1,2,3,7,8-Pentachlorodibenzo-p-dioxindaily maximumreport only (ng/L)all year001
1,2,3,4,7,8-Hexachlorodibenzo-p-dioxindaily maximumreport only (ng/L)all year001
1,2,3,6,7,8-Hexachlorodibenzo-p-dioxindaily maximumreport only (ng/L)all year001
1,2,3,7,8,9-Hexachlorodibenzo-p-dioxindaily maximumreport only (ng/L)all year001
1,2,3,7,8-Pentachlorodibenzofurandaily maximumreport only (ng/L)all year001
2,3,4,7,8-Pentachlorodibenzofurandaily maximumreport only (ng/L)all year001
1,2,3,4,7,8-Hexachlorodibenzofurandaily maximumreport only (ng/L)all year001
1,2,3,6,7,8-Hexachlorodibenzofurandaily maximumreport only (ng/L)all year001
1,2,3,7,8,9-Hexachlorodibenzofurandaily maximumreport only (ng/L)all year001
2,3,4,6,7,8-Hexachlorodibenzofurandaily maximumreport only (ng/L)all year001
1,2,3,4,6,7,8-Heptachlorodibenzofurandaily maximumreport only (ng/L)all year001
1,2,3,4,7,8,9-Heptachlorodibenzofurandaily maximumreport only (ng/L)all year001
1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxindaily maximumreport only (ng/L)all year001
Dichlorobromomethanedaily maximumreport only (ug/L)all year001
Carbon tetrachloridemonthly average≤ .25 ug/Lall year001
Carbon tetrachloridedaily maximum≤ .5 ug/Lall year001
1,2-Dichloroethanedaily maximumreport only (ug/L)all year001
Bromoformdaily maximumreport only (ug/L)all year001
Dibromochloromethanedaily maximumreport only (ug/L)all year001
Chloroformdaily maximumreport only (ug/L)all year001
Toluenedaily maximumreport only (ug/L)all year001
Benzenedaily maximumreport only (ug/L)all year001
.delta.-BHCdaily maximumreport only (ug/L)all year001
Acenaphthylenedaily maximumreport only (ug/L)all year001
Acenaphthenedaily maximumreport only (ug/L)all year001
Acroleindaily maximumreport only (ug/L)all year001
Acrylonitriledaily maximumreport only (ug/L)all year001
Anthracenedaily maximumreport only (ug/L)all year001
Benzo[b]fluoranthenedaily maximumreport only (ug/L)all year001
Benzo[k]fluoranthenedaily maximumreport only (ug/L)all year001
Benzo[a]pyrenedaily maximumreport only (ug/L)all year001
Bis[2-chloroethyl] etherdaily maximumreport only (ug/L)all year001
Bis[2-chloroethoxy]methanedaily maximumreport only (ug/L)all year001
Bis[2-chloroisopropyl] etherdaily maximumreport only (ug/L)all year001
Butyl benzyl phthalatedaily maximumreport only (ug/L)all year001
Chlorobenzenedaily maximumreport only (ug/L)all year001
Chrysenedaily maximumreport only (ug/L)all year001
Diethyl phthalatedaily maximumreport only (ug/L)all year001
Dimethyl phthalatedaily maximumreport only (ug/L)all year001
1,2-Diphenylhydrazinedaily maximumreport only (ug/L)all year001
Endosulfan sulfatedaily maximumreport only (ug/L)all year001
.beta.-Endosulfandaily maximumreport only (ug/L)all year001
.alpha.-Endosulfandaily maximumreport only (ug/L)all year001
Endrin aldehydedaily maximumreport only (ug/L)all year001
Ethylbenzenedaily maximumreport only (ug/L)all year001
Fluoranthenedaily maximumreport only (ug/L)all year001
Fluorenedaily maximumreport only (ug/L)all year001
Hexachlorocyclopentadienedaily maximumreport only (ug/L)all year001
Hexachlorobutadienedaily maximumreport only (ug/L)all year001
Hexachloroethanedaily maximumreport only (ug/L)all year001
Indeno[1,2,3-cd]pyrenedaily maximumreport only (ug/L)all year001
Isophoronedaily maximumreport only (ug/L)all year001
Methyl bromide [Bromomethane]daily maximumreport only (ug/L)all year001
Methyl chloride [Chloromethane]daily maximumreport only (ug/L)all year001
Methylene chloridedaily maximumreport only (ug/L)all year001
N-Nitrosodi-N-propylaminedaily maximumreport only (ug/L)all year001
N-Nitrosodiphenylaminedaily maximumreport only (ug/L)all year001
N-Nitrosodimethylamine [NDMA]daily maximumreport only (ug/L)all year001
Nitrobenzenedaily maximumreport only (ug/L)all year001
Phenanthrenedaily maximumreport only (ug/L)all year001
Pyrenedaily maximumreport only (ug/L)all year001
Tetrachloroethylenedaily maximumreport only (ug/L)all year001
Tetrachloroethylenedaily maximum≤ 1 lb/dall year001
1,1-Dichloroethanedaily maximumreport only (ug/L)all year001
1,1-Dichloroethylenedaily maximumreport only (ug/L)all year001
1,1,1-Trichloroethanedaily maximumreport only (ug/L)all year001
1,1,2-Trichloroethanedaily maximumreport only (ug/L)all year001
1,1,2,2-Tetrachloroethanedaily maximumreport only (ug/L)all year001
Benzo[ghi]perylenedaily maximumreport only (ug/L)all year001
Benzo[a]anthracenedaily maximumreport only (ug/L)all year001
1,2-Dichlorobenzenedaily maximumreport only (ug/L)all year001
1,2-Dichloropropanedaily maximumreport only (ug/L)all year001
trans-1,2-Dichloroethylenedaily maximumreport only (ug/L)all year001
1,2,4-Trichlorobenzenedaily maximumreport only (ug/L)all year001
Dibenz[a,h]anthracenedaily maximumreport only (ug/L)all year001
1,3-Dichlorobenzenedaily maximumreport only (ug/L)all year001
1,4-Dichlorobenzenedaily maximumreport only (ug/L)all year001
2-Chloroethyl vinyl ether, [mixed]daily maximumreport only (ug/L)all year001
2-Chloronaphthalenedaily maximumreport only (ug/L)all year001
2-Chlorophenoldaily maximumreport only (ug/L)all year001
2-Nitrophenoldaily maximumreport only (ug/L)all year001
Di-n-octyl phthalatedaily maximumreport only (ug/L)all year001
2,4-Dichlorophenoldaily maximumreport only (ug/L)all year001
2,4-Dimethylphenoldaily maximumreport only (ug/L)all year001
2,4-Dinitrotoluenedaily maximumreport only (ug/L)all year001
2,4-Dinitrophenoldaily maximumreport only (ug/L)all year001
2,4,6-Trichlorophenoldaily maximumreport only (ug/L)all year001
2,6-Dinitrotoluenedaily maximumreport only (ug/L)all year001
3,3'-Dichlorobenzidinemonthly average≤ .04 ug/Lall year001
3,3'-Dichlorobenzidinedaily maximum≤ .08 ug/Lall year001
4-Bromophenyl phenyl etherdaily maximumreport only (ug/L)all year001
4-Chlorophenyl phenyl etherdaily maximumreport only (ug/L)all year001
4-Nitrophenoldaily maximumreport only (ug/L)all year001
PCB-1016daily maximumreport only (ug/L)all year001
2,3,7,8-Tetrachlorodibenzo-p-dioxindaily maximumreport only (ng/L)all year001
Phenoldaily maximumreport only (ug/L)all year001
Naphthalenedaily maximumreport only (ug/L)all year001
Naphthalenedaily maximum≤ .68 lb/dall year001
2,3,7,8-Tetrachlorodibenzofurandaily maximumreport only (ng/L)all year001
Pentachlorophenolmonthly average≤ .28 ug/Lall year001
Pentachlorophenoldaily maximum≤ .56 ug/Lall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximumreport only (ug/L)all year001
Di-n-butyl phthalatedaily maximumreport only (ug/L)all year001
Benzidinedaily maximumreport only (ug/L)all year001
Vinyl chloridedaily maximumreport only (ug/L)all year001
Trichloroethylenedaily maximumreport only (ug/L)all year001
4,4'-DDTdaily maximumreport only (ug/L)all year001
4,4'-DDDdaily maximumreport only (ug/L)all year001
4,4'-DDEdaily maximumreport only (ug/L)all year001
Aldrindaily maximumreport only (ug/L)all year001
.alpha.-BHCdaily maximumreport only (ug/L)all year001
.beta.-BHCdaily maximumreport only (ug/L)all year001
.gamma.-BHCdaily maximumreport only (ug/L)all year001
Chlordane [tech mix. and metabolites]daily maximumreport only (ug/L)all year001
Dieldrindaily maximumreport only (ug/L)all year001
Endrindaily maximumreport only (ug/L)all year001
Toxaphenedaily maximumreport only (ug/L)all year001
Heptachlordaily maximumreport only (ug/L)all year001
Heptachlor epoxidedaily maximumreport only (ug/L)all year001
PCB-1221daily maximumreport only (ug/L)all year001
PCB-1232daily maximumreport only (ug/L)all year001
PCB-1242daily maximumreport only (ug/L)all year001
PCB-1248daily maximumreport only (ug/L)all year001
PCB-1254daily maximumreport only (ug/L)all year001
PCB-1260daily maximumreport only (ug/L)all year001
Polychlorinated biphenyls [PCBs]monthly average≤ .012 ug/Lall year001
Polychlorinated biphenyls [PCBs]daily maximum≤ .018 ug/Lall year001
Hexachlorobenzenedaily maximumreport only (ug/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
1,2,3,4,6,7,8,9-Octachlorodibenzofurandaily maximumreport only (ng/L)all year001
4-Chloro-3-methylphenoldaily maximumreport only (ug/L)all year001
Mercury, total recoverablemonthly average≤ .079 ug/Lall year001
Mercury, total recoverabledaily maximum≤ .12 ug/Lall year001
1,3-Dichloropropenedaily maximumreport only (ug/L)all year001
Total toxic organics [TTO] [40 CFR433]daily maximum≤ 2100 ug/Lall year001
TCDD equivalentsmonthly average≤ .000013 ng/Lall year001
TCDD equivalentsdaily maximum≤ .000026 ng/Lall year001
Chloroethanedaily maximumreport only (ug/L)all year001
% Survival Flow Through 96Hr Acute Oncorhynchus mykissminimum≥ 70 % survivalall year001
% Survival Flow Through 96Hr Acute Oncorhynchus mykissminimum median≥ 90 % survivalall year001
TU Static 48Hr Chronic Haliotis rufescensmonthly average≤ 3.3 tox chronicall year001
TU Static 48Hr Chronic Haliotis rufescensmonthly average≤ 3.3 tox chronicall year001
TU Static 48Hr Chronic Haliotis rufescensdaily maximum≤ 6.6 tox chronicall year001
TU Static 48Hr Chronic Haliotis rufescensdaily maximum≤ 6.6 tox chronicall year001
pHminimumreport only (SU)all year002
pHmaximumreport only (SU)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Zinc, total recoverabledaily maximumreport only (mg/L)all year002
Aluminum, total recoverabledaily maximumreport only (mg/L)all year002
Oil and greasedaily maximumreport only (mg/L)all year002
Volume, totaltotalreport only (Mgal)all year002
Cyanide, total [as CN]daily maximumreport only (ug/L)all yearINF1
Copper, total recoverabledaily maximumreport only (ug/L)all yearINF1
Cyanide, total [as CN]daily maximumreport only (ug/L)all yearINF2
Copper, total recoverabledaily maximumreport only (ug/L)all yearINF2
Mercury, total recoverableannual average≤ .045 kg/yrall yearSUM

How strict are these limits?

Cited limits by parameter: California's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

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