Newton Heat Treating
Active WDID 4 19I019633 Industry, 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
- Industry, 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
- 45 distinct results, 6 reporting years (2017 to 2022)
- Most recent sample Mar 21, 2023 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 2 violation records · 2 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
- 33.99541, -117.88271
- 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
- 19235 E Walnut Dr N, Industry 91748
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Lower San Jose Creek HUC12 180701060502
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
- Newton Heat Treating
- Primary industry (SIC)
- 3398-Metal Heat Treating
- Application ID
- 293163
- NOI processed
- Jul 08, 2005
- Last certified
- Jun 29, 2015
- Facility size
- 27780 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 293163 | Industrial | Active | Jul 08, 2005 | — | Jun 29, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Storm Drain
- 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 |
|---|---|---|---|
| San Jose Creek Reach 1 (SG Confluence to Temple St.) CAR4053100019980918090950 | 476 m | listed | 5 |
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.
45 distinct measurements across 3 parameters, most recent sample Mar 21, 2023.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2022 | 12 | 3 | 0 | Nov 08, 2022 | Mar 21, 2023 |
| 2021 | 9 | 3 | 0 | Dec 14, 2021 | Mar 28, 2022 |
| 2020 | 6 | 3 | 0 | Mar 10, 2021 | Mar 10, 2021 |
| 2019 | 6 | 3 | 0 | Mar 19, 2020 | Mar 19, 2020 |
| 2018 | 6 | 3 | 0 | Mar 06, 2019 | Mar 06, 2019 |
| 2017 | 6 | 3 | 0 | Mar 22, 2018 | Mar 22, 2018 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 15 | 9 | Mar 22, 2018 | Mar 21, 2023 | Results |
| pH | SU | 15 | 0 | Mar 22, 2018 | Mar 21, 2023 | Results |
| Total Suspended Solids (TSS) | mg/L | 15 | 3 | Mar 22, 2018 | Mar 21, 2023 | Results |
All results (45 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Mar 21, 2023 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1239876 | |
| Mar 21, 2023 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1239876 | |
| Mar 21, 2023 | pH | 5.07 | SU | Effluent | Qualifying Storm Event | pH_Field | 1239876 | |
| Mar 21, 2023 | pH | 8.31 | SU | Effluent | Qualifying Storm Event | pH_Field | 1239876 | |
| Mar 21, 2023 | Total Suspended Solids (TSS) | < 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1239876 | |
| Mar 21, 2023 | Total Suspended Solids (TSS) | 19 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1239876 | |
| Nov 08, 2022 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1238418 | |
| Nov 08, 2022 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1238418 | |
| Nov 08, 2022 | pH | 9.39 | SU | Effluent | Qualifying Storm Event | pH_Field | 1238418 | |
| Nov 08, 2022 | pH | 9.41 | SU | Effluent | Qualifying Storm Event | pH_Field | 1238418 | |
| Nov 08, 2022 | Total Suspended Solids (TSS) | 20 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1238418 | |
| Nov 08, 2022 | Total Suspended Solids (TSS) | 80 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1238418 | |
| Mar 28, 2022 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1199375 | |
| Mar 28, 2022 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1199375 | |
| Mar 28, 2022 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1199375 | |
| Mar 28, 2022 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1199375 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | < 10 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1199375 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | 45 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1199375 | |
| Dec 14, 2021 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1199370 | |
| Dec 14, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1199370 | |
| Dec 14, 2021 | Total Suspended Solids (TSS) | < 10 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1199370 | |
| Mar 10, 2021 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1153937 | |
| Mar 10, 2021 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1153937 | |
| Mar 10, 2021 | pH | 8.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1153937 | |
| Mar 10, 2021 | pH | 8.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1153937 | |
| Mar 10, 2021 | Total Suspended Solids (TSS) | 24 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1153937 | |
| Mar 10, 2021 | Total Suspended Solids (TSS) | 41 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1153937 | |
| Mar 19, 2020 | Oil and Grease | 4.4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1122075 | |
| Mar 19, 2020 | Oil and Grease | 4.4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1122075 | |
| Mar 19, 2020 | pH | 8.75 | SU | Effluent | Qualifying Storm Event | pH_Field | 1122075 | |
| Mar 19, 2020 | pH | 8.75 | SU | Effluent | Qualifying Storm Event | pH_Field | 1122075 | |
| Mar 19, 2020 | Total Suspended Solids (TSS) | 4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1122075 | |
| Mar 19, 2020 | Total Suspended Solids (TSS) | 14 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1122075 | |
| Mar 06, 2019 | Oil and Grease | 1.1 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1075374 | |
| Mar 06, 2019 | Oil and Grease | 3.5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1075374 | |
| Mar 06, 2019 | pH | 8.44 | SU | Effluent | Qualifying Storm Event | pH_Field | 1075374 | |
| Mar 06, 2019 | pH | 9.14 | SU | Effluent | Qualifying Storm Event | pH_Field | 1075374 | |
| Mar 06, 2019 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1075374 | |
| Mar 06, 2019 | Total Suspended Solids (TSS) | 76 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1075374 | |
| Mar 22, 2018 | Oil and Grease | 2.9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1009984 | |
| Mar 22, 2018 | Oil and Grease | 2.5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1009984 | |
| Mar 22, 2018 | pH | 8.4 | SU | Effluent | Qualifying Storm Event | pH_Field | 1009984 | |
| Mar 22, 2018 | pH | 8.4 | SU | Effluent | Qualifying Storm Event | pH_Field | 1009984 | |
| Mar 22, 2018 | Total Suspended Solids (TSS) | 94 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1009984 | |
| Mar 22, 2018 | Total Suspended Solids (TSS) | 91 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1009984 |
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 | Jul 16, 2009 – Apr 09, 2021 | Oct 21, 2026 | All violations |
| Enforcement actions | 2 | 2 issued · 0 draft · 0 withdrawn, rescinded or superseded | Jan 13, 2011 – Apr 09, 2021 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Jan 21, 2022 – Jan 21, 2022 | 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 (16 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 08, 2026 | Annual reports | 1336970 | Annual report 2025 | — | |
| Jul 14, 2025 | Annual reports | 1295859 | Annual report 2024 | — | |
| Jul 09, 2024 | Annual reports | 1245029 | Annual report 2023 | — | |
| Jul 06, 2023 | Annual reports | 1191114 | Annual report 2022 | — | |
| Jul 14, 2022 | Annual reports | 1114646 | Annual report 2021 | — | |
| Jan 21, 2022 | Inspections | 2056911 | B Type compliance | Finalized | No Further Action |
| Jul 13, 2021 | Annual reports | 1070743 | Annual report 2020 | — | |
| Apr 09, 2021 | Enforcement actions | 440444 | NOV (Notice of Violation) | Historical | |
| Apr 09, 2021 | Violations | 876713 | Incomplete/Insufficient SWPPP | Violation | Report |
| Aug 18, 2020 | Annual reports | 988158 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 955790 | Annual report 2018 | — | |
| Jul 16, 2018 | Annual reports | 941214 | Annual report 2017 | — | |
| Jul 15, 2017 | Annual reports | 880586 | Annual report 2016 | — | |
| Jul 17, 2016 | Annual reports | 843156 | Annual report 2015 | — | |
| Jan 13, 2011 | Enforcement actions | 405380 | 13267 Letter/Order (Water Code section 13267 letter or order) | Historical | |
| Jul 16, 2009 | Violations | 844583 | Deficient Report | Violation | 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.