Timken Gears and Services

Active WDID 4 19I026578 Santa Fe Springs, 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
Santa Fe Springs, Los Angeles County
Region 4 · Los Angeles · Location · Statewide map
Receiving water
Coyote Creek North Fork (as reported by the facility)
Evidence: identification corroborated Coyote Creek, North Fork Details
Identified receiving water on the 2026 303(d) list
Yes · 4 Appendix A decisions, category 5 Evidence: State-published
Describes the waterbody, not this facility · Waterbody profile
2026 Integrated Report waters within 1.0 km Evidence: geographic proximity
None
Monitoring results Evidence: facility-reported
450 distinct results, 11 reporting years (2015 to 2025)
Most recent sample Feb 19, 2026 · Monitoring
Compliance and enforcement records Evidence: SMARTS record
1 inspection · 1 violation record · 1 enforcement action
Counts as published in SMARTS; not a compliance determination · Details
SMARTS TMDL records Evidence: SMARTS-reported
3 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
33.91857, -118.05615
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
12935 Imperial Highway, Santa Fe Springs 90670
Regional Water Board
4 — Los Angeles

HUC12 watershed Evidence: spatial

  • Coyote Creek-San Gabriel River HUC12 180701060606

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
Timken Gears and Services Inc
Primary industry (SIC)
3566-Speed Changers, Industrial High-Speed Drives, and Gears
Application ID
467840
NOI processed
May 10, 2016
Last certified
Aug 05, 2019
Facility size
217281 SqFt
Impervious area
98 %

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

Permit history

Storm water applications for this WDID, newest first
ApplicationTypeStatusProcessedTerminatedCertified
467840 IndustrialActiveMay 10, 2016 —Aug 05, 2019

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

Receiving water

Reported by the facility Evidence: facility-reported
Coyote Creek North Fork
Discharges directly / indirectly
N / Y (as answered in the permit application)

Evidence: identification corroborated Coyote Creek, North Fork CAR4051501020081117111917

Receiving water reported by facility — waterbody identification corroborated by geographic evidence.

Nearest distance from the reported facility location: 1.6 km. Method receiving_water/2.

2026 Integrated Report status Evidence: State-published

Coyote Creek, North Fork is on the 2026 Clean Water Act section 303(d) list (4 Appendix A decisions; category 5).

2026 Appendix A decisions for the identified receiving water
PollutantCategoryListing decisionTMDL requirementDecision ID
Indicator Bacteria5Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) 5B · San Gabriel River Coliform (45)150288
Oil and Grease5List on 303(d) list (TMDL required list) 5A138912
Selenium5Do Not Delist from 303(d) list (TMDL required list) 5A · San Gabriel River Metals (39)138913
Zinc5List on 303(d) list (TMDL required list) 5A · San Gabriel River Metals (39)138914

Published by the State Water Resources Control Board (2026 California Integrated Report, Appendix A). Listing status is taken from Appendix A only. State Board adoption 2026-02-03; USEPA approval not confirmed. A listing describes the waterbody, not this facility. Waterbody profile.

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.

No 2026 Integrated Report waterbody lies within the proximity threshold of the reported location.

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
TMDLWaterbody (as reported)ParameterLimitTypePeriodDueDischarges to TMDL water
R4 - San Gabriel River Metals and Selenium TMDLR4 - Coyote Creek and its tributary/iesCopper, Total .027 mg/LNEL instantaneous FINAL2020-07-01Y
R4 - San Gabriel River Metals and Selenium TMDLR4 - Coyote Creek and its tributary/iesLead, Total .106 mg/LNEL instantaneous FINAL2020-07-01Y
R4 - San Gabriel River Metals and Selenium TMDLR4 - Coyote Creek and its tributary/iesZinc, Total .158 mg/LNEL instantaneous FINAL2020-07-01Y

3 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.

450 distinct measurements across 6 parameters, most recent sample Feb 19, 2026.

By reporting year

Distinct results by reporting year
Reporting year (July–June)Distinct resultsParametersWith several versionsFirst sampleLast sample
2025786 0 Oct 03, 2025Feb 19, 2026
2024486 0 Feb 06, 2025Mar 05, 2025
2023603 0 Aug 21, 2023Feb 19, 2024
2022363 0 Nov 08, 2022Feb 23, 2023
2021363 0 Dec 09, 2021Mar 28, 2022
2020243 0 Dec 28, 2020Mar 03, 2021
2019483 0 Nov 20, 2019Mar 10, 2020
2018363 0 Dec 28, 2018Feb 05, 2019
2017363 0 Dec 20, 2017Mar 02, 2018
2016243 0 Dec 15, 2016Dec 21, 2016
2015243 0 Apr 07, 2016May 06, 2016

By parameter

Distinct results by parameter
ParameterUnitsMeasurementsBelow detectionFirst sampleLast sampleResults
Oil and Greasemg/L133 96Apr 07, 2016Feb 19, 2026 Results
pHSU133 0Apr 07, 2016Feb 19, 2026 Results
Total Suspended Solids (TSS)mg/L133 33Apr 07, 2016Feb 19, 2026 Results
Copper, Totalmg/L17 0Mar 05, 2025Feb 19, 2026 Results
Lead, Totalmg/L17 0Mar 05, 2025Feb 19, 2026 Results
Zinc, Totalmg/L17 0Mar 05, 2025Feb 19, 2026 Results

All results (450 distinct rows)

Reported monitoring results, newest first
Sample dateParameterResultUnitsLocation typeEventMethodReportVersions
Feb 19, 2026 Copper, Total .021 mg/L Effluent Qualifying Storm Event E200.8 1376041
Feb 19, 2026 Copper, Total .003 mg/L Effluent Qualifying Storm Event E200.8 1376041
Feb 19, 2026 Copper, Total .0044 mg/L Effluent Qualifying Storm Event E200.8 1376041
Feb 19, 2026 Lead, Total .013 mg/L Effluent Qualifying Storm Event E200.8 1376041
Feb 19, 2026 Lead, Total .00076 mg/L Effluent Qualifying Storm Event E200.8 1376041
Feb 19, 2026 Lead, Total .0011 mg/L Effluent Qualifying Storm Event E200.8 1376041
Feb 19, 2026 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1376041
Feb 19, 2026 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1376041
Feb 19, 2026 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1376041
Feb 19, 2026 pH 7.98 SU Effluent Qualifying Storm Event A4500HB 1376041
Feb 19, 2026 pH 7.8 SU Effluent Qualifying Storm Event A4500HB 1376041
Feb 19, 2026 pH 7.5 SU Effluent Qualifying Storm Event A4500HB 1376041
Feb 19, 2026 Total Suspended Solids (TSS) 2 mg/L Effluent Qualifying Storm Event A2540D 1376041
Feb 19, 2026 Total Suspended Solids (TSS) 5 mg/L Effluent Qualifying Storm Event A2540D 1376041
Feb 19, 2026 Total Suspended Solids (TSS) 3 mg/L Effluent Qualifying Storm Event A2540D 1376041
Feb 19, 2026 Zinc, Total .403 mg/L Effluent Qualifying Storm Event E200.8 1376041
Feb 19, 2026 Zinc, Total .145 mg/L Effluent Qualifying Storm Event E200.8 1376041
Feb 19, 2026 Zinc, Total .131 mg/L Effluent Qualifying Storm Event E200.8 1376041
Nov 14, 2025 Copper, Total .063 mg/L Effluent Qualifying Storm Event E200.8 1376039
Nov 14, 2025 Copper, Total .05 mg/L Effluent Qualifying Storm Event E200.8 1376039
Nov 14, 2025 Lead, Total .026 mg/L Effluent Qualifying Storm Event E200.8 1376039
Nov 14, 2025 Lead, Total .015 mg/L Effluent Qualifying Storm Event E200.8 1376039
Nov 14, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1376039
Nov 14, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1376039
Nov 14, 2025 pH 6 SU Effluent Qualifying Storm Event pH_Paper 1376039
Nov 14, 2025 pH 6 SU Effluent Qualifying Storm Event pH_Paper 1376039
Nov 14, 2025 Total Suspended Solids (TSS) 79 mg/L Effluent Qualifying Storm Event A2540D 1376039
Nov 14, 2025 Total Suspended Solids (TSS) 203 mg/L Effluent Qualifying Storm Event A2540D 1376039
Nov 14, 2025 Zinc, Total .813 mg/L Effluent Qualifying Storm Event E200.8 1376039
Nov 14, 2025 Zinc, Total .763 mg/L Effluent Qualifying Storm Event E200.8 1376039
Oct 14, 2025 Copper, Total .018 mg/L Effluent Qualifying Storm Event E200.8 1355088
Oct 14, 2025 Copper, Total .016 mg/L Effluent Qualifying Storm Event E200.8 1355088
Oct 14, 2025 Copper, Total .012 mg/L Effluent Qualifying Storm Event E200.8 1355088
Oct 14, 2025 Copper, Total .02 mg/L Effluent Qualifying Storm Event E200.8 1355088
Oct 14, 2025 Lead, Total .0067 mg/L Effluent Qualifying Storm Event E200.8 1355088
Oct 14, 2025 Lead, Total .0079 mg/L Effluent Qualifying Storm Event E200.8 1355088
Oct 14, 2025 Lead, Total .0068 mg/L Effluent Qualifying Storm Event E200.8 1355088
Oct 14, 2025 Lead, Total .021 mg/L Effluent Qualifying Storm Event E200.8 1355088
Oct 14, 2025 Oil and Grease 1 mg/L Effluent Qualifying Storm Event E1664A 1355088
Oct 14, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1355088
Oct 14, 2025 Oil and Grease 3 mg/L Effluent Qualifying Storm Event E1664A 1355088
Oct 14, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1355088
Oct 14, 2025 pH 6 SU Effluent Qualifying Storm Event pH_Paper 1355088
Oct 14, 2025 pH 6 SU Effluent Qualifying Storm Event pH_Paper 1355088
Oct 14, 2025 pH 6 SU Effluent Qualifying Storm Event pH_Paper 1355088
Oct 14, 2025 pH 6 SU Effluent Qualifying Storm Event pH_Paper 1355088
Oct 14, 2025 Total Suspended Solids (TSS) 10 mg/L Effluent Qualifying Storm Event A2540D 1355088
Oct 14, 2025 Total Suspended Solids (TSS) 12 mg/L Effluent Qualifying Storm Event A2540D 1355088
Oct 14, 2025 Total Suspended Solids (TSS) 16 mg/L Effluent Qualifying Storm Event A2540D 1355088
Oct 14, 2025 Total Suspended Solids (TSS) 26 mg/L Effluent Qualifying Storm Event A2540D 1355088

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 typeRecordsAs publishedDatesRetrievedList
Violations1 1 Violation · 0 Potential (preliminary) · 0 Dismissed Apr 09, 2021 – Apr 09, 2021 Oct 21, 2026 All violations
Enforcement actions1 1 issued · 0 draft · 0 withdrawn, rescinded or superseded Apr 09, 2021 – Apr 09, 2021 Oct 21, 2026 All actions
Inspections1inspections, not findings Jan 22, 2025 – Jan 22, 2025 Oct 21, 2026 All inspections
Annual reports11certified reports (contents not shown) 2015 – 2025 Oct 21, 2026 All reports
Water-quality-based corrective action reports0reports, by parameter — Oct 21, 2026

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 (14 records, newest first)
Compliance and enforcement records, newest first
DateRecordIDType or purposeStatus as publishedDetail
Jul 13, 2026 Annual reports 1338835 Annual report 2025 —
Jun 25, 2025 Annual reports 1297856 Annual report 2024 —
Jan 22, 2025 Inspections 2066895 B Type compliance FinalizedAdditional Info Required
May 30, 2024 Annual reports 1247112 Annual report 2023 —
Jul 06, 2023 Annual reports 1193302 Annual report 2022 —
Jul 15, 2022 Annual reports 1117104 Annual report 2021 —
Jun 28, 2021 Annual reports 1065304 Annual report 2020 —
Apr 09, 2021 Enforcement actions 440474 NOV (Notice of Violation) Historical
Apr 09, 2021 Violations 876745 Incomplete/Insufficient SWPPP ViolationReport
Jun 08, 2020 Annual reports 982384 Annual report 2019 —
Aug 05, 2019 Annual reports 958724 Annual report 2018 —
Jul 12, 2018 Annual reports 944160 Annual report 2017 —
Aug 07, 2017 Annual reports 883627 Annual report 2016 —
Jun 23, 2016 Annual reports 872101 Annual report 2015 —

Sources and provenance

Sources behind this page
InformationSourceRetrieved or published
Permit, location, receiving-water textSMARTS Industrial Application Specific DataOct 20, 2026
Permit historySMARTS Storm Water ApplicationsOct 20, 2026
Monitoring resultsSMARTS Industrial Parameter DataOct 20, 2026
Watershed Boundary Dataset HU2 GeoPackages 15, 16, 18 (WBDHU12)USGS2026-10-22
2026 California Integrated Report, Appendix A: 2026 303(d) List (final)SWRCB2026-10-22
Final_2026_Rivers_and_Streams + Final_2026_Lakes_and_Reservoirs (FeatureServer 0)SWRCB GIS2026-10-22
SMARTS TMDL requirementsSMARTS2026-10-21

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

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