Accurate Steel

Active WDID 4 19I009388 South Gate, Los Angeles County Region 4 · Los Angeles

At a glance

Permit Evidence: SMARTS record: Active Industrial; Notice of Intent (WDID code I) · Permits and applications
Location Evidence: facility-reported: South Gate, Los Angeles County; Region 4 · Los Angeles · Location · Statewide map
Receiving water: LOS ANGELES River (as reported by the facility); Evidence: candidate, awaiting review Details
Identified receiving water on the 2026 303(d) list: Not established; Shown only when the reported receiving water is identified and corroborated.
2026 Integrated Report waters within 1.0 km Evidence: geographic proximity: 2 waterbodies; 2 on the 2026 303(d) list; Proximity only; not a discharge pathway · Nearby waterbodies
Monitoring results Evidence: facility-reported: 557 distinct results, 11 reporting years (2015 to 2025); Most recent sample Apr 12, 2026 · Monitoring
Compliance and enforcement records Evidence: SMARTS record: 1 inspection · 9 violation records · 6 enforcement actions; Counts as published in SMARTS; not a compliance determination · Details
SMARTS TMDL records Evidence: SMARTS-reported: 7 records; TMDL records

Each label shows where a statement comes from. How to read the labels.

Overview and location

Reported facility location HUC12 watershed Corroborated receiving water 2026 Integrated Report waterbodies nearby

Open this facility on the statewide map

Reported location Evidence: facility-reported

Coordinates: 33.94001, -118.16973
Precision: 5 decimal places
Shared point: No
Matches application record: same

Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.

Facility address: 10008 Miller Way, South Gate 90280
Regional Water Board: 4 — Los Angeles

HUC12 watershed Evidence: spatial

Alhambra Wash-Rio Hondo HUC12 180701050303

The facility's reported location lies within this HUC12 watershed (spatial derivation); it is not a discharge location.

Permits and applications Evidence: SMARTS record

Current permit record

Permit type: Industrial
Application type: Notice of Intent (WDID code I)
Status: Active
Operator: Accurate Steel
Primary industry (SIC): 3398-Metal Heat Treating
Secondary SIC: 3471-Electroplating, Plating, Polishing, Anodizing, and Coloring
Application ID: 189806
NOI processed: Nov 15, 1992
Last certified: Aug 03, 2015
Facility size: 1.7 Acres
Impervious area: 0 %

Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.

Permit history

Storm water applications for this WDID, newest first
Application	Type	Status	Processed	Terminated	Certified
189806	Industrial	Active	Nov 15, 1992	—	Aug 03, 2015

Every storm water application SMARTS records for this WDID, newest first (1).

Receiving water

Reported by the facility Evidence: facility-reported: LOS ANGELES River
Discharges directly / indirectly: Y / N (as answered in the permit application)

Evidence: not confirmed Evidence: candidate, awaiting review Awaiting review

Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.

Why it is not confirmed (1)

C1 name is only a prefix of official names

7 official waterbodies share this name; none is assigned without review.

Impaired waters and TMDLs

Two kinds of information, kept apart: 2026 Integrated Report waterbodies near the reported location (geographic proximity only), and TMDL records that SMARTS lists for this facility. Neither establishes where the facility discharges; see Receiving water for the facility's own statement.

Nearby waterbodies Evidence: geographic proximity

Spatial proximity only; discharge pathway not established. Being near a waterbody does not mean the facility discharges to it.

Nearest 2026 Integrated Report waterbodies
Waterbody (2026 Integrated Report)	Distance	2026 303(d) list	Appendix A decisions
Rio Hondo Reach 1 (Confl. LA River to Snt Ana Fwy) CAR4051501019990202112624	86 m	listed	8
Los Angeles River Reach 2 (Carson to Figueroa Street) CAR4051501019990202085021	470 m	listed	9

Waterbodies within 1.0 km of the reported facility location. Method proximity/1.

SMARTS TMDL records Evidence: SMARTS-reported

SMARTS TMDL record as reported for this facility; it is not a determination that the TMDL applies to the facility.

TMDL records SMARTS lists for this facility
TMDL	Waterbody (as reported)	Parameter	Limit	Type	Period	Due	Discharges to TMDL water
Los Angeles River Metals TMDL	Los Angeles River and Los Angeles River Tributaries	Cadmium, Total	.0031 mg/L	NEL instantaneous	FINAL	2020-07-01	Y
Los Angeles River Metals TMDL	Los Angeles River and Los Angeles River Tributaries	Copper, Total	.06749 mg/L	NEL instantaneous	FINAL	2020-07-01	Y
Los Angeles River Metals TMDL	Los Angeles River and Los Angeles River Tributaries	Zinc, Total	.159 mg/L	NEL instantaneous	FINAL	2020-07-01	Y
Los Angeles River Nitrogen TMDL	Los Angeles River Tributaries	Ammonia, Total (as N)	10.1 mg/L	NEL instantaneous	FINAL	2020-07-01	Y
Los Angeles River Nitrogen TMDL	Los Angeles River Watershed	Nitrate, Total (as N)	8 mg/L	NEL instantaneous	FINAL	2020-07-01	Y
Los Angeles River Nitrogen TMDL	Los Angeles River Watershed	Nitrite Plus Nitrate (as N)	8 mg/L	NEL instantaneous	FINAL	2020-07-01	Y
Los Angeles River Nitrogen TMDL	Los Angeles River Watershed	Nitrite, Total (as N)	1 mg/L	NEL instantaneous	FINAL	2020-07-01	Y

7 records. Links between these records and specific TMDL projects or listed waterbodies have not been reviewed and are not shown.

Reported monitoring results Evidence: facility-reported

Numeric Action Level (NAL) screening is being independently validated and is not shown. Nothing on this page states whether a result exceeded a NAL.

557 distinct measurements across 14 parameters, most recent sample Apr 12, 2026.

By reporting year

Distinct results by reporting year
Reporting year (July–June)	Distinct results	Parameters	First sample	Last sample
2025	207	12	Oct 14, 2025	Apr 12, 2026
2024	121	11	Feb 06, 2025	Mar 05, 2025
2023	80	8	Dec 20, 2023	Mar 06, 2024
2022	32	4	Nov 08, 2022	Jan 09, 2023
2021	16	4	Dec 14, 2021	Mar 28, 2022
2020	32	4	Dec 28, 2020	Mar 09, 2021
2019	17	6	Dec 04, 2019	Apr 06, 2020
2018	19	4	Oct 13, 2018	Jan 31, 2019
2017	12	4	Jan 08, 2018	Mar 21, 2018
2016	17	5	Dec 15, 2016	Feb 17, 2017
2015	4	2	Nov 03, 2015	Feb 18, 2016

By parameter

Distinct results by parameter
Parameter	Units	Measurements	Below detection	First sample	Last sample	Results
Total Suspended Solids (TSS)	mg/L	78	16	Nov 03, 2015	Apr 12, 2026	Results
pH	SU	77	0	Nov 03, 2015	Apr 12, 2026	Results
Ammonia, Total (as N)	mg/L	75	0	Dec 15, 2016	Apr 12, 2026	Results
Oil and Grease	mg/L	66	43	Dec 15, 2016	Apr 12, 2026	Results
Aluminum, Total	mg/L	40	5	Dec 20, 2023	Apr 12, 2026	Results
Iron, Total	mg/L	40	12	Dec 20, 2023	Apr 12, 2026	Results
Nitrite Plus Nitrate (as N)	mg/L	40	1	Dec 20, 2023	Apr 12, 2026	Results
Zinc, Total	mg/L	40	3	Dec 20, 2023	Apr 12, 2026	Results
Copper, Total	mg/L	30	5	Feb 06, 2025	Apr 12, 2026	Results
Nitrate, Total (as N)	mg/L	25	3	Feb 06, 2025	Apr 12, 2026	Results
Nitrite, Total (as N)	mg/L	25	8	Feb 06, 2025	Apr 12, 2026	Results
Cadmium, Total	mg/L	9	6	Oct 14, 2025	Nov 20, 2025	Results

Show 2 more parameters

More parameters
Parameter	Units	Measurements	Below detection	First sample	Last sample	Results
Total Organic Carbon (TOC)	mg/L	9	0	Jan 08, 2018	Mar 12, 2020	Results
Electrical Conductivity @ 25 Deg. C	umhos/cm	3	0	Dec 15, 2016	Mar 12, 2020	Results

All results (557 distinct rows)

Reported monitoring results, newest first
Sample date	Parameter	Result	Units	Location type	Event	Method	Report
Apr 12, 2026	Aluminum, Total	.12	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583
Apr 12, 2026	Aluminum, Total	.24	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583
Apr 12, 2026	Aluminum, Total	1.2	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583
Apr 12, 2026	Aluminum, Total	.77	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583
Apr 12, 2026	Aluminum, Total	.79	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583
Apr 12, 2026	Ammonia, Total (as N)	.42	mg/L	Effluent	Qualifying Storm Event	A4500NHH	1372583
Apr 12, 2026	Ammonia, Total (as N)	.95	mg/L	Effluent	Qualifying Storm Event	A4500NHH	1372583
Apr 12, 2026	Ammonia, Total (as N)	.42	mg/L	Effluent	Qualifying Storm Event	A4500NHH	1372583
Apr 12, 2026	Ammonia, Total (as N)	.65	mg/L	Effluent	Qualifying Storm Event	A4500NHH	1372583
Apr 12, 2026	Ammonia, Total (as N)	.43	mg/L	Effluent	Qualifying Storm Event	A4500NHH	1372583
Apr 12, 2026	Copper, Total	.0087	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583
Apr 12, 2026	Copper, Total	.0152	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583
Apr 12, 2026	Copper, Total	.0307	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583
Apr 12, 2026	Copper, Total	.00778	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583
Apr 12, 2026	Copper, Total	.0518	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583
Apr 12, 2026	Iron, Total	.08	mg/L	Effluent	Qualifying Storm Event	E200.7	1372583
Apr 12, 2026	Iron, Total	.13	mg/L	Effluent	Qualifying Storm Event	E200.7	1372583
Apr 12, 2026	Iron, Total	.51	mg/L	Effluent	Qualifying Storm Event	E200.7	1372583
Apr 12, 2026	Iron, Total	.23	mg/L	Effluent	Qualifying Storm Event	E200.7	1372583
Apr 12, 2026	Iron, Total	.28	mg/L	Effluent	Qualifying Storm Event	E200.7	1372583
Apr 12, 2026	Nitrate, Total (as N)	.17	mg/L	Effluent	Qualifying Storm Event	E353.2	1372583
Apr 12, 2026	Nitrate, Total (as N)	.15	mg/L	Effluent	Qualifying Storm Event	E353.2	1372583
Apr 12, 2026	Nitrate, Total (as N)	3.2	mg/L	Effluent	Qualifying Storm Event	E353.2	1372583
Apr 12, 2026	Nitrate, Total (as N)	4.3	mg/L	Effluent	Qualifying Storm Event	E353.2	1372583
Apr 12, 2026	Nitrate, Total (as N)	4.2	mg/L	Effluent	Qualifying Storm Event	E353.2	1372583
Apr 12, 2026	Nitrite Plus Nitrate (as N)	.18	mg/L	Effluent	Qualifying Storm Event	A4500NOH	1372583
Apr 12, 2026	Nitrite Plus Nitrate (as N)	.18	mg/L	Effluent	Qualifying Storm Event	A4500NOH	1372583
Apr 12, 2026	Nitrite Plus Nitrate (as N)	3.2	mg/L	Effluent	Qualifying Storm Event	A4500NOH	1372583
Apr 12, 2026	Nitrite Plus Nitrate (as N)	4.4	mg/L	Effluent	Qualifying Storm Event	A4500NOH	1372583
Apr 12, 2026	Nitrite Plus Nitrate (as N)	4.3	mg/L	Effluent	Qualifying Storm Event	A4500NOH	1372583
Apr 12, 2026	Nitrite, Total (as N)	< .06	mg/L	Effluent	Qualifying Storm Event	A4500NOB	1372583
Apr 12, 2026	Nitrite, Total (as N)	< .06	mg/L	Effluent	Qualifying Storm Event	A4500NOB	1372583
Apr 12, 2026	Nitrite, Total (as N)	< .06	mg/L	Effluent	Qualifying Storm Event	A4500NOB	1372583
Apr 12, 2026	Nitrite, Total (as N)	.13	mg/L	Effluent	Qualifying Storm Event	A4500NOB	1372583
Apr 12, 2026	Nitrite, Total (as N)	.071	mg/L	Effluent	Qualifying Storm Event	A4500NOB	1372583
Apr 12, 2026	Oil and Grease	< 1	mg/L	Effluent	Qualifying Storm Event	E1664A	1372583
Apr 12, 2026	Oil and Grease	< 1	mg/L	Effluent	Qualifying Storm Event	E1664A	1372583
Apr 12, 2026	Oil and Grease	3.8	mg/L	Effluent	Qualifying Storm Event	E1664A	1372583
Apr 12, 2026	Oil and Grease	1.2	mg/L	Effluent	Qualifying Storm Event	E1664A	1372583
Apr 12, 2026	Oil and Grease	2.8	mg/L	Effluent	Qualifying Storm Event	E1664A	1372583
Apr 12, 2026	pH	7	SU	Effluent	Qualifying Storm Event	pH_Paper	1372583
Apr 12, 2026	pH	7	SU	Effluent	Qualifying Storm Event	pH_Paper	1372583
Apr 12, 2026	pH	7	SU	Effluent	Qualifying Storm Event	pH_Paper	1372583
Apr 12, 2026	pH	7	SU	Effluent	Qualifying Storm Event	pH_Paper	1372583
Apr 12, 2026	Total Suspended Solids (TSS)	2	mg/L	Effluent	Qualifying Storm Event	A2540D	1372583
Apr 12, 2026	Total Suspended Solids (TSS)	2	mg/L	Effluent	Qualifying Storm Event	A2540D	1372583
Apr 12, 2026	Total Suspended Solids (TSS)	36	mg/L	Effluent	Qualifying Storm Event	A2540D	1372583
Apr 12, 2026	Total Suspended Solids (TSS)	33	mg/L	Effluent	Qualifying Storm Event	A2540D	1372583
Apr 12, 2026	Total Suspended Solids (TSS)	29	mg/L	Effluent	Qualifying Storm Event	A2540D	1372583
Apr 12, 2026	Zinc, Total	.2	mg/L	Effluent	Qualifying Storm Event	E200.8	1372583

Results are shown exactly as reported by the discharger. Identical rows repeated in the State's export are shown once. Where the export contains different versions of the same sample and parameter, each version is listed and flagged. Details.

Compliance and enforcement records Evidence: SMARTS record

These are records as the State Water Board publishes them in SMARTS, with the source's own types and statuses. They are not a compliance determination or rating. A record listed here is not proof of a violation beyond what the source states, and the absence of records does not establish compliance.

Compliance and enforcement records by type
Record type	Records	As published	Dates	Retrieved	List
Violations	9	9 Violation · 0 Potential (preliminary) · 0 Dismissed	Jul 02, 1999 – Jul 22, 2026	Oct 21, 2026	All violations
Enforcement actions	6	6 issued · 0 draft · 0 withdrawn, rescinded or superseded	Sep 27, 2013 – Jul 22, 2026	Oct 21, 2026	All actions
Inspections	1	inspections, not findings	Sep 27, 2013 – Sep 27, 2013	Oct 21, 2026	All inspections
Annual reports	11	certified reports (contents not shown)	2015 – 2025	Oct 21, 2026	All reports
Water-quality-based corrective action reports	1	reports, by parameter	2025-26 – 2025-26	Oct 21, 2026	All reports

Each record type is counted by its own SMARTS identifier. A violation and the enforcement action that cites it are two records in two lists; they are never added together.

Chronological record history (28 records, newest first)

Compliance and enforcement records, newest first
Date	Record	ID	Type or purpose	Status as published	Detail
Jul 22, 2026	Enforcement actions	470099	EPL (Expedited Payment Letter)	Active	R4-2026-0171
Jul 22, 2026	Violations	904173	Effluent	Violation	Report
Jul 22, 2026	Violations	904174	Late Report	Violation	Report
Jul 15, 2026	Annual reports	1334275	Annual report 2025	—
Apr 24, 2026	Water-quality-based corrective action reports	1371558	WQBCAR 2025-26	—	Copper, Total, Zinc, Total
Jan 07, 2026	Enforcement actions	468297	ACL (Administrative Civil Liability)	Historical	R4-2025-0275
Jan 07, 2026	Violations	902752	Late Report	Violation	Report
Jan 07, 2026	Violations	902753	Effluent	Violation	Report
Jul 03, 2025	Annual reports	1293049	Annual report 2024	—
Jul 03, 2024	Annual reports	1242057	Annual report 2023	—
Jul 14, 2023	Annual reports	1187997	Annual report 2022	—
Jul 14, 2022	Annual reports	1111267	Annual report 2021	—
Jul 13, 2021	Annual reports	1067210	Annual report 2020	—
Oct 22, 2020	Annual reports	937290	Annual report 2017	—
Oct 22, 2020	Annual reports	951879	Annual report 2018	—
Aug 28, 2020	Enforcement actions	437324	NOV (Notice of Violation)	Historical
Aug 28, 2020	Violations	873775	Late Report	Violation	Report
Jul 10, 2020	Annual reports	984372	Annual report 2019	—
Feb 07, 2018	Enforcement actions	429059	NOV (Notice of Violation)	Historical
Jan 01, 2018	Violations	866147	Late Report	Violation	Report
Jun 27, 2017	Annual reports	876444	Annual report 2016	—
Apr 19, 2017	Enforcement actions	425981	NOV (Notice of Violation)	Historical
Jun 13, 2016	Annual reports	840220	Annual report 2015	—
Aug 14, 2015	Violations	863064	Incomplete/Insufficient SWPPP	Violation	Internal Report
Sep 27, 2013	Enforcement actions	413353	NTC (Notice to Comply)	Historical

Sources and provenance

Sources behind this page
Information	Source	Retrieved or published
Permit, location, receiving-water text	SMARTS Industrial Application Specific Data	Oct 20, 2026
Permit history	SMARTS Storm Water Applications	Oct 20, 2026
Monitoring results	SMARTS Industrial Parameter Data	Oct 20, 2026
Watershed Boundary Dataset HU2 GeoPackages 15, 16, 18 (WBDHU12)	USGS	2026-10-22
2026 California Integrated Report, Appendix A: 2026 303(d) List (final)	SWRCB	2026-10-22
Final_2026_Rivers_and_Streams + Final_2026_Lakes_and_Reservoirs (FeatureServer 0)	SWRCB GIS	2026-10-22
SMARTS TMDL requirements	SMARTS	2026-10-21

Relationships computed 2026-10-22 with methods facility_huc12/1, proximity/1, receiving_water/2, tmdl_reference/1, waterbody_huc12_ovl/1, waterbody_huc12_pub/1; proximity threshold 1.0 km.

How to read the evidence labels

Evidence: SMARTS record Evidence: facility-reported Information as published in SMARTS or reported by the discharger.
Evidence: identification corroborated The reported receiving-water name identifies one official waterbody and the facility's location is consistent with it. It does not establish a discharge pathway.
Evidence: candidate, awaiting review Evidence: not confirmed The reported name could match one or more official waterbodies, but no identification has been confirmed; nothing is assigned without review.
Evidence: spatial Evidence: geographic proximity Derived from the reported location only.
Evidence: SMARTS-reported Source records whose links to official references are not yet reviewed.
Evidence: unavailable The information could not be loaded or is not in the sources.

Records are shown as published and are not compliance determinations. How geographic context is derived.