Jenco Plating Inc
Active WDID 4 19I001469 South 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
- South El Monte, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Legg Lake (as reported by the facility)
- Evidence: identification corroborated Legg Lake Details
- Identified receiving water on the 2026 303(d) list
- Yes · 8 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
- 1 waterbody; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 202 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Feb 16, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 3 inspections · 5 violation records · 5 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
- 34.05185, -118.06138
- 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
- 9536 Rush St, South El Monte 91733
- 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
- Pamela J Cooke
- Primary industry (SIC)
- 3471-Electroplating, Plating, Polishing, Anodizing, and Coloring
- Application ID
- 188810
- NOI processed
- Mar 27, 1992
- Last certified
- Feb 11, 2015
- Facility size
- 16564 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 188810 | Industrial | Active | Mar 27, 1992 | — | Feb 11, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Legg Lake
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: identification corroborated Legg Lake CAL4053100019980917155807
Receiving water reported by facility — waterbody identification corroborated by geographic evidence.
Nearest distance from the reported facility location: 1.9 km. Method receiving_water/2.
2026 Integrated Report status Evidence: State-published
Legg Lake is on the 2026 Clean Water Act section 303(d) list (8 Appendix A decisions; category 5).
| Pollutant | Category | Listing decision | TMDL requirement | Decision ID |
|---|---|---|---|---|
| Ammonia | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | 5B · Echo, Lincoln, Peck, Calabasas Eutrophications (17) and Trash (16) | 68950 |
| Chlorophyll-a | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | 5B · Echo Lake, PeckRd Lake DDT/PCBs/Chlordane (19) | 136215 |
| DDT (Dichlorodiphenyltrichloroethane) | 5 | List on 303(d) list (TMDL required list) | 5A | 96870 |
| Mercury | 5 | List on 303(d) list (TMDL required list) | 5A | 149613 |
| Odor | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | 5B · Echo, Lincoln, Peck, Calabasas Eutrophications (17) and Trash (16) | 69208 |
| PCBs (Polychlorinated biphenyls) | 5 | List on 303(d) list (TMDL required list) | 5A | 96869 |
| pH | 5 | List on 303(d) list (TMDL required list) | 5A | 70201 |
| Trash | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | 5B · Legg Lake Trash (40) | 75553 |
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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Rio Hondo Reach 3 (above Spreading Grounds) CAR4053100020110601150056 | 999 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 | 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 | Lead, Total | .094 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 |
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.
202 distinct measurements across 13 parameters, most recent sample Feb 16, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 33 | 11 | 0 | Nov 14, 2025 | Feb 16, 2026 |
| 2024 | 22 | 11 | 0 | Feb 13, 2025 | Apr 25, 2025 |
| 2023 | 11 | 11 | 0 | Jan 22, 2024 | Jan 22, 2024 |
| 2022 | 20 | 10 | 0 | Jan 03, 2023 | Jan 09, 2023 |
| 2021 | 20 | 10 | 0 | Dec 14, 2021 | Apr 13, 2022 |
| 2020 | 10 | 10 | 0 | Jan 29, 2021 | Jan 29, 2021 |
| 2019 | 16 | 8 | 0 | Dec 04, 2019 | Mar 12, 2020 |
| 2018 | 20 | 10 | 0 | Jan 10, 2019 | Feb 01, 2019 |
| 2017 | 20 | 12 | 0 | Mar 02, 2018 | Mar 21, 2018 |
| 2016 | 8 | 8 | 0 | Feb 17, 2017 | Feb 17, 2017 |
| 2015 | 22 | 8 | 0 | Oct 05, 2015 | Feb 17, 2017 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Aluminum, Total | mg/L | 21 | 1 | Oct 05, 2015 | Feb 16, 2026 | Results |
| Iron, Total | mg/L | 21 | 10 | Oct 05, 2015 | Feb 16, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 21 | 0 | Oct 05, 2015 | Feb 16, 2026 | Results |
| Oil and Grease | mg/L | 21 | 17 | Oct 05, 2015 | Feb 16, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 21 | 9 | Oct 05, 2015 | Feb 16, 2026 | Results |
| Zinc, Total | mg/L | 21 | 0 | Oct 05, 2015 | Feb 16, 2026 | Results |
| Chromium (Total) | mg/L | 20 | 18 | May 06, 2016 | Feb 16, 2026 | Results |
| pH | SU | 20 | 0 | May 06, 2016 | Feb 16, 2026 | Results |
| Copper, Total | mg/L | 14 | 1 | Mar 02, 2018 | Feb 16, 2026 | Results |
| Lead, Total | mg/L | 14 | 5 | Mar 02, 2018 | Feb 16, 2026 | Results |
| Cadmium, Total | mg/L | 6 | 6 | Jan 22, 2024 | Feb 16, 2026 | Results |
| Cyanide, Total (as CN) | mg/L | 1 | 0 | Mar 02, 2018 | Mar 02, 2018 | Results |
Show 1 more parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 1 | 0 | Mar 21, 2018 | Mar 21, 2018 | Results |
All results (202 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 16, 2026 | Aluminum, Total | .0132 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372103 | |
| Feb 16, 2026 | Cadmium, Total | < .0012 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372103 | |
| Feb 16, 2026 | Chromium (Total) | < .05 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1372103 | |
| Feb 16, 2026 | Copper, Total | .0024 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372103 | |
| Feb 16, 2026 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1372103 | |
| Feb 16, 2026 | Lead, Total | < .0008 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372103 | |
| Feb 16, 2026 | Nitrite Plus Nitrate (as N) | .04 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1372103 | |
| Feb 16, 2026 | Oil and Grease | 18 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1372103 | |
| Feb 16, 2026 | pH | 6.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1372103 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | < 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1372103 | |
| Feb 16, 2026 | Zinc, Total | .0988 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372103 | |
| Nov 14, 2025 | Aluminum, Total | .0153 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372097 | |
| Nov 14, 2025 | Aluminum, Total | .0103 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372101 | |
| Nov 14, 2025 | Cadmium, Total | < .0012 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372097 | |
| Nov 14, 2025 | Cadmium, Total | < .0012 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372101 | |
| Nov 14, 2025 | Chromium (Total) | < .05 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1372097 | |
| Nov 14, 2025 | Chromium (Total) | < .05 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1372101 | |
| Nov 14, 2025 | Copper, Total | .0039 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372097 | |
| Nov 14, 2025 | Copper, Total | .0023 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372101 | |
| Nov 14, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1372097 | |
| Nov 14, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1372101 | |
| Nov 14, 2025 | Lead, Total | < .0008 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372097 | |
| Nov 14, 2025 | Lead, Total | < .0008 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372101 | |
| Nov 14, 2025 | Nitrite Plus Nitrate (as N) | .14 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1372097 | |
| Nov 14, 2025 | Nitrite Plus Nitrate (as N) | .12 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1372101 | |
| Nov 14, 2025 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1372097 | |
| Nov 14, 2025 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1372101 | |
| Nov 14, 2025 | pH | 6.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1372097 | |
| Nov 14, 2025 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1372101 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | < 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1372097 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | < 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1372101 | |
| Nov 14, 2025 | Zinc, Total | .0474 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372097 | |
| Nov 14, 2025 | Zinc, Total | .006 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372101 | |
| Apr 25, 2025 | Aluminum, Total | .0681 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332194 | |
| Apr 25, 2025 | Cadmium, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332194 | |
| Apr 25, 2025 | Chromium (Total) | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1332194 | |
| Apr 25, 2025 | Copper, Total | .0036 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332194 | |
| Apr 25, 2025 | Iron, Total | DNQ .09 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1332194 | |
| Apr 25, 2025 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332194 | |
| Apr 25, 2025 | Nitrite Plus Nitrate (as N) | .2 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1332194 | |
| Apr 25, 2025 | Oil and Grease | 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1332194 | |
| Apr 25, 2025 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1332194 | |
| Apr 25, 2025 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1332194 | |
| Apr 25, 2025 | Zinc, Total | .0684 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332194 | |
| Feb 13, 2025 | Aluminum, Total | .0515 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332191 | |
| Feb 13, 2025 | Cadmium, Total | DNQ .0001 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332191 | |
| Feb 13, 2025 | Chromium (Total) | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1332191 | |
| Feb 13, 2025 | Copper, Total | .0086 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332191 | |
| Feb 13, 2025 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1332191 | |
| Feb 13, 2025 | Lead, Total | .002 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332191 |
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 | 5 | 4 Violation · 1 Potential (preliminary) · 0 Dismissed | Aug 14, 2015 – Apr 30, 2025 | Oct 21, 2026 | All violations |
| Enforcement actions | 5 | 5 issued · 0 draft · 0 withdrawn, rescinded or superseded | Apr 19, 2017 – Apr 30, 2025 | Oct 21, 2026 | All actions |
| Inspections | 3 | inspections, not findings | Jan 17, 2002 – Jan 26, 2023 | 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 | 0 | reports, 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 (24 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 15, 2026 | Annual reports | 1334381 | Annual report 2025 | — | |
| Jun 27, 2025 | Annual reports | 1293161 | Annual report 2024 | — | |
| Apr 30, 2025 | Enforcement actions | 455802 | NOV (Notice of Violation) | Historical | |
| Apr 30, 2025 | Violations | 891129 | Failure to Notify | Violation | Report |
| Jul 10, 2024 | Violations | 889306 | Enforcement Action | Potential | Internal Report |
| Jul 09, 2024 | Enforcement actions | 453610 | 13383 Order (Water Code section 13383 order) | Historical | R4-2024-0188 |
| Mar 29, 2024 | Annual reports | 1242179 | Annual report 2023 | — | |
| May 31, 2023 | Enforcement actions | 449820 | ACL (Administrative Civil Liability) | Historical | R4-2023-0072 |
| May 12, 2023 | Annual reports | 1188129 | Annual report 2022 | — | |
| Apr 12, 2023 | Enforcement actions | 449705 | NOV (Notice of Violation) | Historical | |
| Apr 12, 2023 | Violations | 884797 | Deficient BMP Implementation | Violation | Inspection |
| Jan 26, 2023 | Inspections | 2059617 | Enforcement Follow-up | Finalized | No Further Action |
| Sep 12, 2022 | Annual reports | 1111412 | Annual report 2021 | — | |
| Jul 13, 2021 | Annual reports | 1067362 | Annual report 2020 | — | |
| Jul 13, 2021 | Violations | 884962 | Late Report | Violation | Report |
| Aug 11, 2020 | Annual reports | 984537 | Annual report 2019 | — | |
| Jul 20, 2020 | Annual reports | 952047 | Annual report 2018 | — | |
| Jun 06, 2018 | Annual reports | 937459 | Annual report 2017 | — | |
| Jul 11, 2017 | Annual reports | 876623 | Annual report 2016 | — | |
| Apr 19, 2017 | Enforcement actions | 425976 | NOV (Notice of Violation) | Historical | |
| Jul 14, 2016 | Annual reports | 843264 | Annual report 2015 | — | |
| Aug 14, 2015 | Violations | 863059 | Incomplete/Insufficient SWPPP | Violation | Internal Report |
| Jun 26, 2008 | Inspections | 1734253 | B Type compliance | — | |
| Jan 17, 2002 | Inspections | 1734252 | B Type compliance | — |
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.