Alum A Coat
Active WDID 4 19I029501 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
- 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
- None
- Monitoring results Evidence: facility-reported
- 523 distinct results, 5 reporting years (2021 to 2025)
- Most recent sample Feb 16, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 0 inspections · 2 violation records · 1 enforcement action
- 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
- 34.05658, -118.05314
- 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
- 2439 Seaman Street, 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
- Alum A Coat
- Primary industry (SIC)
- 3471-Electroplating, Plating, Polishing, Anodizing, and Coloring
- Application ID
- 540582
- NOI processed
- Nov 23, 2021
- Last certified
- Nov 19, 2021
- Facility size
- 1.84 Acres
- Impervious area
- 100 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 540582 | Industrial | Active | Nov 23, 2021 | — | Nov 19, 2021 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Legg Lakes
- Discharges directly / indirectly
- Y / N (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.
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 | Waterbody (as reported) | Parameter | Limit | Type | Period | Due | Discharges to TMDL water |
|---|---|---|---|---|---|---|---|
| Los Angeles Area Lakes TMDL | Legg Lakes | Nitrogen, Total (as N) | 1.8 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 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 |
6 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.
523 distinct measurements across 18 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 | 200 | 11 | 0 | Oct 14, 2025 | Feb 16, 2026 |
| 2024 | 28 | 7 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2023 | 96 | 8 | 0 | Dec 20, 2023 | Feb 20, 2024 |
| 2022 | 164 | 15 | 0 | Sep 09, 2022 | Mar 22, 2023 |
| 2021 | 35 | 7 | 0 | Mar 28, 2022 | Mar 28, 2022 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Iron, Total | mg/L | 61 | 22 | Mar 28, 2022 | Feb 16, 2026 | Results |
| pH | SU | 61 | 0 | Mar 28, 2022 | Feb 16, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 61 | 11 | Mar 28, 2022 | Feb 16, 2026 | Results |
| Zinc, Total | mg/L | 61 | 4 | Mar 28, 2022 | Feb 16, 2026 | Results |
| Aluminum, Total | mg/L | 60 | 4 | Mar 28, 2022 | Feb 16, 2026 | Results |
| Oil and Grease | mg/L | 60 | 56 | Mar 28, 2022 | Feb 16, 2026 | Results |
| Copper, Total | mg/L | 56 | 12 | Sep 09, 2022 | Feb 16, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 54 | 9 | Mar 28, 2022 | Feb 16, 2026 | Results |
| Nitrate, Total (as N) | mg/L | 20 | 0 | Oct 14, 2025 | Feb 16, 2026 | Results |
| Nitrite, Total (as N) | mg/L | 20 | 20 | Oct 14, 2025 | Feb 16, 2026 | Results |
| Nitrogen, Total (as N) | mg/L | 2 | 0 | Feb 16, 2026 | Feb 16, 2026 | Results |
| Cadmium, Total Recoverable | ug/L | 1 | 1 | Feb 24, 2023 | Feb 24, 2023 | Results |
Show 6 more parameters
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Chemical Oxygen Demand (COD) | mg/L | 1 | 1 | Feb 24, 2023 | Feb 24, 2023 | Results |
| Chromium, Total Recoverable | mg/L | 1 | 1 | Feb 24, 2023 | Feb 24, 2023 | Results |
| Cyanide, Total (as CN) | mg/L | 1 | 1 | Feb 24, 2023 | Feb 24, 2023 | Results |
| Lead, Total Recoverable | ug/L | 1 | 0 | Feb 24, 2023 | Feb 24, 2023 | Results |
| Nickel, Total Recoverable | ug/L | 1 | 1 | Feb 24, 2023 | Feb 24, 2023 | Results |
| Sulfide, Dissolved (as S) | mg/L | 1 | 1 | Feb 24, 2023 | Feb 24, 2023 | Results |
All results (523 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 16, 2026 | Aluminum, Total | .13 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Aluminum, Total | .13 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Aluminum, Total | .092 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Aluminum, Total | .099 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Copper, Total | DNQ .0028 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1370496 | |
| Feb 16, 2026 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1370496 | |
| Feb 16, 2026 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1370496 | |
| Feb 16, 2026 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1370496 | |
| Feb 16, 2026 | Nitrate, Total (as N) | .646 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1370496 | |
| Feb 16, 2026 | Nitrate, Total (as N) | .636 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1370496 | |
| Feb 16, 2026 | Nitrate, Total (as N) | .64 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1370496 | |
| Feb 16, 2026 | Nitrate, Total (as N) | .637 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1370496 | |
| Feb 16, 2026 | Nitrite Plus Nitrate (as N) | .646 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1370496 | |
| Feb 16, 2026 | Nitrite Plus Nitrate (as N) | .637 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1370496 | |
| Feb 16, 2026 | Nitrite, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1370496 | |
| Feb 16, 2026 | Nitrite, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1370496 | |
| Feb 16, 2026 | Nitrite, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1370496 | |
| Feb 16, 2026 | Nitrite, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1370496 | |
| Feb 16, 2026 | Nitrogen, Total (as N) | .636 | mg/L | Effluent | Qualifying Storm Event | A4500NHE | 1370496 | |
| Feb 16, 2026 | Nitrogen, Total (as N) | .64 | mg/L | Effluent | Qualifying Storm Event | A4500NHE | 1370496 | |
| Feb 16, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370496 | |
| Feb 16, 2026 | Oil and Grease | ND 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370496 | |
| Feb 16, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370496 | |
| Feb 16, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370496 | |
| Feb 16, 2026 | pH | 7.02 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370496 | |
| Feb 16, 2026 | pH | 7.02 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370496 | |
| Feb 16, 2026 | pH | 7.02 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370496 | |
| Feb 16, 2026 | pH | 7.02 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370496 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370496 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370496 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370496 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370496 | |
| Feb 16, 2026 | Zinc, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Zinc, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Zinc, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Feb 16, 2026 | Zinc, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370496 | |
| Dec 24, 2025 | Aluminum, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367912 | |
| Dec 24, 2025 | Aluminum, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367912 | |
| Dec 24, 2025 | Aluminum, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367912 | |
| Dec 24, 2025 | Aluminum, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367912 | |
| Dec 24, 2025 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367912 | |
| Dec 24, 2025 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367912 | |
| Dec 24, 2025 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367912 | |
| Dec 24, 2025 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367912 | |
| Dec 24, 2025 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1367912 | |
| Dec 24, 2025 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1367912 |
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 | 2 | 2 Violation · 0 Potential (preliminary) · 0 Dismissed | Jun 12, 2024 – Jun 13, 2024 | Oct 21, 2026 | All violations |
| Enforcement actions | 1 | 1 issued · 0 draft · 0 withdrawn, rescinded or superseded | Jun 12, 2024 – Jun 12, 2024 | Oct 21, 2026 | All actions |
| Inspections | 0 | inspections, not findings | — | Oct 21, 2026 | |
| Annual reports | 5 | certified reports (contents not shown) | 2021 – 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 (9 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 13, 2026 | Annual reports | 1340506 | Annual report 2025 | — | |
| Jul 09, 2025 | Annual reports | 1299649 | Annual report 2024 | — | |
| Oct 09, 2024 | Water-quality-based corrective action reports | 1313741 | WQBCAR 2022-23 | — | Zinc, Total |
| Jul 09, 2024 | Annual reports | 1249014 | Annual report 2023 | — | |
| Jun 13, 2024 | Violations | 889152 | Effluent | Violation | Report |
| Jun 12, 2024 | Enforcement actions | 453458 | ACL (Administrative Civil Liability) | Historical | R4-2024-0238 |
| Jun 12, 2024 | Violations | 889153 | Late Report | Violation | Report |
| Jul 14, 2023 | Annual reports | 1195308 | Annual report 2022 | — | |
| Jul 06, 2022 | Annual reports | 1169893 | Annual report 2021 | — |
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.