Precision Powdered Metal Parts
Active WDID 4 19I025142 Pomona, 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
- Pomona, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- San Gabriel Valley River (as reported by the facility)
- Evidence: not confirmed 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
- 88 distinct results, 9 reporting years (2015 to 2025)
- Most recent sample Nov 24, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 2 inspections · 4 violation records · 3 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
- 34.05657, -117.80069
- 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
- 145 Atlantic Street, Pomona 91768
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Upper San Jose Creek HUC12 180701060501
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 Powdered Metal Parts
- Primary industry (SIC)
- 3399-Primary Metal Products, NEC
- Application ID
- 451026
- NOI processed
- Nov 13, 2014
- Last certified
- Feb 08, 2023
- Facility size
- 52000 SqFt
- Impervious area
- 95 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 451026 | Industrial | Active | Nov 13, 2014 | — | Feb 08, 2023 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- San Gabriel Valley 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 |
|---|---|---|---|
| South San Jose Creek (Los Angeles County) CAR4055100020110328104701 | 309 m | listed | 1 |
| San Jose Creek Reach 2 (Temple to I-10 at White Ave.) CAR4055100019980918093038 | 447 m | listed | 1 |
Waterbodies within 1.0 km of the reported facility location. Method proximity/1.
SMARTS TMDL records Evidence: SMARTS-reported
No TMDL records for this facility in the SMARTS TMDL export.
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.
88 distinct measurements across 8 parameters, most recent sample Nov 24, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 12 | 6 | 0 | Nov 18, 2025 | Nov 24, 2025 |
| 2024 | 6 | 6 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2023 | 12 | 6 | 0 | Jan 22, 2024 | Feb 20, 2024 |
| 2022 | 12 | 6 | 0 | Nov 08, 2022 | Feb 24, 2023 |
| 2020 | 3 | 3 | 0 | Dec 28, 2020 | Dec 28, 2020 |
| 2019 | 6 | 3 | 0 | Nov 27, 2019 | Apr 06, 2020 |
| 2018 | 12 | 3 | 0 | Nov 29, 2018 | Jan 14, 2019 |
| 2017 | 9 | 3 | 0 | Jan 09, 2018 | Mar 22, 2018 |
| 2015 | 16 | 4 | 0 | Sep 15, 2015 | Jan 06, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| pH | SU | 21 | 0 | Sep 15, 2015 | Nov 24, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 21 | 4 | Sep 15, 2015 | Nov 24, 2025 | Results |
| Oil and Grease | mg/L | 20 | 4 | Sep 15, 2015 | Nov 24, 2025 | Results |
| Copper, Total | mg/L | 7 | 2 | Nov 08, 2022 | Nov 24, 2025 | Results |
| Lead, Total | mg/L | 7 | 7 | Nov 08, 2022 | Nov 24, 2025 | Results |
| Zinc, Total | mg/L | 7 | 0 | Nov 08, 2022 | Nov 24, 2025 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 4 | 0 | Sep 15, 2015 | Jan 06, 2016 | Results |
| Total Organic Carbon (TOC), Percent Removal | % | 1 | 0 | Dec 28, 2020 | Dec 28, 2020 | Results |
All results (88 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Nov 24, 2025 | Copper, Total | .0025 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1364218 | |
| Nov 24, 2025 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1364218 | |
| Nov 24, 2025 | Oil and Grease | 3.9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1364218 | |
| Nov 24, 2025 | pH | 6.6 | SU | Effluent | Qualifying Storm Event | A4500HB | 1364218 | |
| Nov 24, 2025 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1364218 | |
| Nov 24, 2025 | Zinc, Total | .058 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1364218 | |
| Nov 18, 2025 | Copper, Total | .011 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361100 | |
| Nov 18, 2025 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361100 | |
| Nov 18, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1361100 | |
| Nov 18, 2025 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | A4500HB | 1361100 | |
| Nov 18, 2025 | Total Suspended Solids (TSS) | 17 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361100 | |
| Nov 18, 2025 | Zinc, Total | .13 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361100 | |
| Feb 13, 2025 | Copper, Total | .01 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1324597 | |
| Feb 13, 2025 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1324597 | |
| Feb 13, 2025 | Oil and Grease | 3.6 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1324597 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1324597 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324597 | |
| Feb 13, 2025 | Zinc, Total | .057 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1324597 | |
| Feb 20, 2024 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1284054 | |
| Feb 20, 2024 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1284054 | |
| Feb 20, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1284054 | |
| Feb 20, 2024 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | A4500HB | 1284054 | |
| Feb 20, 2024 | Total Suspended Solids (TSS) | .7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1284054 | |
| Feb 20, 2024 | Zinc, Total | .071 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1284054 | |
| Jan 22, 2024 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1276698 | |
| Jan 22, 2024 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1276698 | |
| Jan 22, 2024 | Oil and Grease | 4.1 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1276698 | |
| Jan 22, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1276698 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 16 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1276698 | |
| Jan 22, 2024 | Zinc, Total | .034 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1276698 | |
| Feb 24, 2023 | Copper, Total | .0082 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1231204 | |
| Feb 24, 2023 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1231204 | |
| Feb 24, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 1231204 | |
| Feb 24, 2023 | pH | 7.7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1231204 | |
| Feb 24, 2023 | Total Suspended Solids (TSS) | .8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1231204 | |
| Feb 24, 2023 | Zinc, Total | .032 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1231204 | |
| Nov 08, 2022 | Copper, Total | .021 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1225194 | |
| Nov 08, 2022 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1225194 | |
| Nov 08, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 1225194 | |
| Nov 08, 2022 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | A4500HB | 1225194 | |
| Nov 08, 2022 | Total Suspended Solids (TSS) | 8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1225194 | |
| Nov 08, 2022 | Zinc, Total | .017 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1225194 | |
| Dec 28, 2020 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | A4500HB | 1153426 | |
| Dec 28, 2020 | Total Organic Carbon (TOC), Percent Removal | 29 | % | Effluent | Qualifying Storm Event | 1153426 | ||
| Dec 28, 2020 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1153426 | |
| Apr 06, 2020 | Oil and Grease | 1.5 | mg/L | Effluent | Qualifying Storm Event | A5220B | 1121898 | |
| Apr 06, 2020 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1121898 | |
| Apr 06, 2020 | Total Suspended Solids (TSS) | 8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1121898 | |
| Nov 27, 2019 | Oil and Grease | 13 | mg/L | Effluent | Qualifying Storm Event | A5220B | 1121922 | |
| Nov 27, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1121922 |
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 | 4 | 4 Violation · 0 Potential (preliminary) · 0 Dismissed | Aug 14, 2015 – Feb 12, 2021 | Oct 21, 2026 | All violations |
| Enforcement actions | 3 | 2 issued · 0 draft · 1 withdrawn, rescinded or superseded | Feb 22, 2017 – Apr 10, 2024 | Oct 21, 2026 | All actions |
| Inspections | 2 | inspections, not findings | Sep 07, 2017 – Sep 26, 2018 | 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 (20 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 08, 2026 | Annual reports | 1339404 | Annual report 2025 | — | |
| Jul 07, 2025 | Annual reports | 1298452 | Annual report 2024 | — | |
| Jul 12, 2024 | Annual reports | 1247738 | Annual report 2023 | — | |
| Apr 10, 2024 | Enforcement actions | 453270 | EPL (Expedited Payment Letter) | Rescinded | R4-2024-0111 |
| Sep 12, 2023 | Annual reports | 1193950 | Annual report 2022 | — | |
| Apr 28, 2022 | Annual reports | 1117841 | Annual report 2021 | — | |
| Jul 12, 2021 | Annual reports | 1066087 | Annual report 2020 | — | |
| Feb 12, 2021 | Violations | 888915 | Late Report | Violation | Report |
| Jul 14, 2020 | Annual reports | 983214 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 959588 | Annual report 2018 | — | |
| Sep 26, 2018 | Inspections | 2039675 | B Type compliance | — | No Further Action |
| Jul 13, 2018 | Annual reports | 945018 | Annual report 2017 | — | |
| Dec 04, 2017 | Enforcement actions | 427966 | NOV (Notice of Violation) | Historical | |
| Sep 07, 2017 | Inspections | 2035005 | B Type compliance | — | No Further Action |
| Sep 07, 2017 | Violations | 865021 | Deficient BMP Implementation | Violation | Inspection |
| Sep 07, 2017 | Violations | 865022 | Incomplete/Insufficient SWPPP | Violation | Inspection |
| Jul 11, 2017 | Annual reports | 884311 | Annual report 2016 | — | |
| Feb 22, 2017 | Enforcement actions | 425654 | NOV (Notice of Violation) | Historical | |
| Jun 23, 2016 | Annual reports | 844502 | Annual report 2015 | — | |
| Aug 14, 2015 | Violations | 862606 | Incomplete/Insufficient SWPPP | Violation | Internal Report |
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.