The Precision Coil Spring Co
Active WDID 4 19I003473 El Monte, 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
- El Monte, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- 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
- 1 waterbody; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 529 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Feb 19, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 10 violation records · 7 enforcement actions
- Counts as published in SMARTS; not a compliance determination · Details
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
Reported location Evidence: facility-reported
- Coordinates
- 34.08026, -118.04974
- 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
- 10107 Rose Ave, El Monte 91731
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Eaton Wash HUC12 180701050301
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
- Precision Coil Spring Co
- Primary industry (SIC)
- 3495-Wire Springs
- Application ID
- 189162
- NOI processed
- Apr 03, 1992
- Last certified
- Jan 16, 2024
- Facility size
- 2 Acres
- Impervious area
- 90 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 189162 | Industrial | Active | Apr 03, 1992 | — | Jan 16, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Rio Hondo River
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: not confirmed Not matchable to a single waterbody
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Rio Hondo Reach 3 (above Spreading Grounds) CAR4053100020110601150056 | 804 m | listed | 5 |
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 | 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 | Zinc, Total | .159 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 |
4 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.
529 distinct measurements across 10 parameters, most recent sample Feb 19, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 41 | 7 | 0 | Nov 14, 2025 | Feb 19, 2026 |
| 2024 | 42 | 7 | 0 | Feb 07, 2025 | Feb 13, 2025 |
| 2023 | 21 | 7 | 0 | Feb 01, 2024 | Feb 01, 2024 |
| 2022 | 84 | 7 | 0 | Nov 08, 2022 | May 04, 2023 |
| 2021 | 75 | 9 | 0 | Oct 25, 2021 | Mar 28, 2022 |
| 2020 | 24 | 8 | 0 | Mar 03, 2021 | Mar 03, 2021 |
| 2019 | 119 | 8 | 0 | Nov 20, 2019 | May 18, 2020 |
| 2018 | 54 | 9 | 0 | Nov 29, 2018 | Jan 31, 2019 |
| 2017 | 38 | 8 | 0 | Jan 08, 2018 | Mar 02, 2018 |
| 2016 | 24 | 8 | 0 | Dec 30, 2016 | Feb 16, 2017 |
| 2015 | 7 | 7 | 0 | Mar 07, 2016 | Mar 07, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Aluminum, Total | mg/L | 69 | 5 | Mar 07, 2016 | Feb 19, 2026 | Results |
| Zinc, Total | mg/L | 69 | 17 | Mar 07, 2016 | Feb 19, 2026 | Results |
| Iron, Total | mg/L | 68 | 2 | Mar 07, 2016 | Feb 19, 2026 | Results |
| Oil and Grease | mg/L | 68 | 33 | Mar 07, 2016 | Feb 19, 2026 | Results |
| pH | SU | 68 | 0 | Dec 30, 2016 | Feb 19, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 67 | 25 | Mar 07, 2016 | Feb 19, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 40 | 3 | Mar 07, 2016 | Feb 19, 2026 | Results |
| Nitrate, Total (as N) | mg/L | 38 | 0 | Jan 08, 2018 | Mar 28, 2022 | Results |
| Nitrite, Total (as N) | mg/L | 38 | 23 | Jan 08, 2018 | Mar 28, 2022 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 4 | 0 | Mar 07, 2016 | Feb 16, 2017 | Results |
All results (529 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 19, 2026 | Aluminum, Total | .18 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370622 | |
| Feb 19, 2026 | Aluminum, Total | .34 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370622 | |
| Feb 19, 2026 | Aluminum, Total | .29 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370622 | |
| Feb 19, 2026 | Iron, Total | .26 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1370622 | |
| Feb 19, 2026 | Iron, Total | .48 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1370622 | |
| Feb 19, 2026 | Iron, Total | .58 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1370622 | |
| Feb 19, 2026 | Nitrite Plus Nitrate (as N) | .13 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1370622 | |
| Feb 19, 2026 | Nitrite Plus Nitrate (as N) | .14 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1370622 | |
| Feb 19, 2026 | Nitrite Plus Nitrate (as N) | .17 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1370622 | |
| Feb 19, 2026 | Oil and Grease | 2.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370622 | |
| Feb 19, 2026 | Oil and Grease | 2.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370622 | |
| Feb 19, 2026 | Oil and Grease | 2.5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370622 | |
| Feb 19, 2026 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370622 | |
| Feb 19, 2026 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370622 | |
| Feb 19, 2026 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370622 | |
| Feb 19, 2026 | Total Suspended Solids (TSS) | 9.1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370622 | |
| Feb 19, 2026 | Total Suspended Solids (TSS) | 10 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370622 | |
| Feb 19, 2026 | Total Suspended Solids (TSS) | 16.1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370622 | |
| Feb 19, 2026 | Zinc, Total | .051 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370622 | |
| Feb 19, 2026 | Zinc, Total | .067 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370622 | |
| Feb 19, 2026 | Zinc, Total | .085 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370622 | |
| Nov 14, 2025 | Aluminum, Total | .5 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361029 | |
| Nov 14, 2025 | Aluminum, Total | .26 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361029 | |
| Nov 14, 2025 | Aluminum, Total | .43 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361029 | |
| Nov 14, 2025 | Iron, Total | .68 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361029 | |
| Nov 14, 2025 | Iron, Total | .35 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361029 | |
| Nov 14, 2025 | Iron, Total | .63 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361029 | |
| Nov 14, 2025 | Nitrite Plus Nitrate (as N) | .28 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1361029 | |
| Nov 14, 2025 | Nitrite Plus Nitrate (as N) | .32 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1361029 | |
| Nov 14, 2025 | Nitrite Plus Nitrate (as N) | .36 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1361029 | |
| Nov 14, 2025 | Oil and Grease | < 2.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1361029 | |
| Nov 14, 2025 | Oil and Grease | < 3.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1361029 | |
| Nov 14, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1361029 | |
| Nov 14, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1361029 | |
| Nov 14, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1361029 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 30.1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361029 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 12.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361029 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 14.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361029 | |
| Nov 14, 2025 | Zinc, Total | .094 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361029 | |
| Nov 14, 2025 | Zinc, Total | .061 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361029 | |
| Nov 14, 2025 | Zinc, Total | .092 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361029 | |
| Feb 13, 2025 | Aluminum, Total | .24 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1325703 | |
| Feb 13, 2025 | Aluminum, Total | .22 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1325703 | |
| Feb 13, 2025 | Aluminum, Total | .24 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1325703 | |
| Feb 13, 2025 | Iron, Total | .36 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325703 | |
| Feb 13, 2025 | Iron, Total | .29 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325703 | |
| Feb 13, 2025 | Iron, Total | .31 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325703 | |
| Feb 13, 2025 | Nitrite Plus Nitrate (as N) | .1 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1325703 | |
| Feb 13, 2025 | Nitrite Plus Nitrate (as N) | .2 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1325703 | |
| Feb 13, 2025 | Nitrite Plus Nitrate (as N) | .3 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1325703 |
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.
| Record type | Records | As published | Dates | Retrieved | List |
|---|---|---|---|---|---|
| Violations | 10 | 10 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 02, 1999 – Mar 05, 2025 | Oct 21, 2026 | All violations |
| Enforcement actions | 7 | 7 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 10, 2012 – Mar 05, 2025 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Jan 29, 2002 – Jan 29, 2002 | 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 | 2022-23 – 2022-23 | 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 (30 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 17, 2026 | Annual reports | 1335804 | Annual report 2025 | — | |
| Jul 07, 2025 | Annual reports | 1294640 | Annual report 2024 | — | |
| Mar 05, 2025 | Enforcement actions | 455584 | ACL (Administrative Civil Liability) | Historical | R4-2025-0110 |
| Mar 05, 2025 | Violations | 890894 | Late Report | Violation | Report |
| Sep 30, 2024 | Water-quality-based corrective action reports | 1313543 | WQBCAR 2022-23 | — | Nitrite Plus Nitrate (as N) |
| Jun 25, 2024 | Annual reports | 1243749 | Annual report 2023 | — | |
| Jun 05, 2024 | Enforcement actions | 453391 | ACL (Administrative Civil Liability) | Historical | R4-2024-0207 |
| Jun 05, 2024 | Violations | 889064 | Effluent | Violation | Report |
| Jun 05, 2024 | Violations | 889065 | Late Report | Violation | Report |
| Jul 12, 2023 | Annual reports | 1189778 | Annual report 2022 | — | |
| May 31, 2023 | Enforcement actions | 449821 | ACL (Administrative Civil Liability) | Historical | R4-2023-0078 |
| Jul 12, 2022 | Annual reports | 1113195 | Annual report 2021 | — | |
| Jul 09, 2021 | Annual reports | 1069228 | Annual report 2020 | — | |
| Jul 09, 2021 | Violations | 884969 | Late Report | Violation | Report |
| Jul 14, 2020 | Annual reports | 986532 | Annual report 2019 | — | |
| Jan 30, 2019 | Annual reports | 954108 | Annual report 2018 | — | |
| Jun 25, 2018 | Annual reports | 939525 | Annual report 2017 | — | |
| Jun 30, 2017 | Annual reports | 878798 | Annual report 2016 | — | |
| Feb 15, 2017 | Enforcement actions | 425609 | NOV (Notice of Violation) | Historical | |
| Jan 01, 2017 | Violations | 862557 | Enforcement Action | Violation | Internal Report |
| Sep 29, 2016 | Annual reports | 839163 | Annual report 2015 | — | |
| Feb 25, 2015 | Enforcement actions | 418411 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 01, 2014 | Violations | 856518 | Late Report | Violation | Report |
| Jul 01, 2013 | Violations | 856517 | Late Report | Violation | Report |
| May 07, 2013 | Enforcement actions | 412199 | NOV (Notice of Violation) | Historical |
Sources and provenance
| 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.