Tri J Heat Treating
Active WDID 4 19I020969 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
- Pacific Ocean (as reported by the facility)
- Evidence: candidate, awaiting review 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
- None
- Monitoring results Evidence: facility-reported
- 91 distinct results, 8 reporting years (2015 to 2025)
- Most recent sample Feb 17, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 6 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
- 34.05978, -117.74523
- Precision
- 5 decimal places
- Shared point
- 2 permits report this exact point
- Matches application record
- application not found
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 327 Commercial, Pomona 91767
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Upper Chino Creek HUC12 180702030702
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
- Tri J Heat Treating Co Inc
- Primary industry (SIC)
- 3398-Metal Heat Treating
- Application ID
- 327307
- NOI processed
- Jun 30, 2007
- Last certified
- Jun 25, 2015
- Facility size
- 31400 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
No application records for this WDID in the general applications export.
Receiving water
- Reported by the facility Evidence: facility-reported
- Pacific Ocean
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: not confirmed Evidence: candidate, awaiting review Awaiting review
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
Why it is not confirmed (1)
- C1 name is only a prefix of official names
290 official waterbodies share this name; none is assigned without review.
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
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.
91 distinct measurements across 5 parameters, most recent sample Feb 17, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 12 | 3 | 0 | Nov 18, 2025 | Feb 17, 2026 |
| 2024 | 8 | 2 | 0 | Feb 06, 2025 | Mar 06, 2025 |
| 2023 | 21 | 3 | 0 | Aug 21, 2023 | Feb 01, 2024 |
| 2021 | 4 | 2 | 0 | Dec 09, 2021 | Dec 09, 2021 |
| 2018 | 12 | 3 | 0 | Dec 06, 2018 | May 16, 2019 |
| 2017 | 6 | 3 | 0 | Mar 22, 2018 | Mar 22, 2018 |
| 2016 | 20 | 5 | 0 | Oct 17, 2016 | Jan 09, 2017 |
| 2015 | 8 | 4 | 0 | Jul 30, 2015 | Aug 12, 2015 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Total Suspended Solids (TSS) | mg/L | 34 | 13 | Jul 30, 2015 | Feb 17, 2026 | Results |
| Oil and Grease | mg/L | 30 | 14 | Dec 16, 2016 | Feb 17, 2026 | Results |
| pH | SU | 19 | 2 | Jul 30, 2015 | Feb 17, 2026 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 4 | 2 | Jul 30, 2015 | Oct 17, 2016 | Results |
| Total Organic Carbon (TOC) | mg/L | 4 | 0 | Jul 30, 2015 | Oct 17, 2016 | Results |
All results (91 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 17, 2026 | Oil and Grease | < 5 | mg/L | Internal | Qualifying Storm Event | E1664A | 1369076 | |
| Feb 17, 2026 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1369076 | |
| Feb 17, 2026 | pH | 7.2 | SU | Internal | Qualifying Storm Event | pH_Paper | 1369076 | |
| Feb 17, 2026 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1369076 | |
| Feb 17, 2026 | Total Suspended Solids (TSS) | < 5 | mg/L | Internal | Qualifying Storm Event | A2540D | 1369076 | |
| Feb 17, 2026 | Total Suspended Solids (TSS) | < 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1369076 | |
| Nov 18, 2025 | Oil and Grease | 2.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1362780 | |
| Nov 18, 2025 | Oil and Grease | < 5 | mg/L | Internal | Qualifying Storm Event | E1664A | 1362780 | |
| Nov 18, 2025 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1362780 | |
| Nov 18, 2025 | pH | 7.2 | SU | Internal | Qualifying Storm Event | pH_Paper | 1362780 | |
| Nov 18, 2025 | Total Suspended Solids (TSS) | < 4.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1362780 | |
| Nov 18, 2025 | Total Suspended Solids (TSS) | < 4.2 | mg/L | Internal | Qualifying Storm Event | A2540D | 1362780 | |
| Mar 06, 2025 | Oil and Grease | 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1324263 | |
| Mar 06, 2025 | Total Suspended Solids (TSS) | 7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324263 | |
| Feb 13, 2025 | Oil and Grease | 12 | mg/L | Internal | Qualifying Storm Event | E1664A | 1324270 | |
| Feb 13, 2025 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1324270 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 1 | mg/L | Internal | Qualifying Storm Event | A2540D | 1324270 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324270 | |
| Feb 06, 2025 | Oil and Grease | 5 | mg/L | Internal | Qualifying Storm Event | E1664A | 1324263 | |
| Feb 06, 2025 | Total Suspended Solids (TSS) | 5 | mg/L | Internal | Qualifying Storm Event | A2540D | 1324263 | |
| Feb 01, 2024 | Oil and Grease | < 3 | mg/L | Internal | Qualifying Storm Event | E1664A | 1267749 | |
| Feb 01, 2024 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1279043 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 1 | mg/L | Internal | Qualifying Storm Event | A2540D | 1267749 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1279043 | |
| Jan 22, 2024 | Oil and Grease | < 5 | mg/L | Internal | Qualifying Storm Event | E1664B | 1275142 | |
| Jan 22, 2024 | Oil and Grease | 174 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1275142 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | < 5 | mg/L | Internal | Qualifying Storm Event | A2540D | 1275142 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | < 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1275142 | |
| Jan 03, 2024 | Oil and Grease | < 5 | mg/L | Internal | Qualifying Storm Event | E1664B | 1273222 | |
| Jan 03, 2024 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1273226 | |
| Jan 03, 2024 | pH | 6.8 | SU | Internal | Qualifying Storm Event | pH_Field | 1273222 | |
| Jan 03, 2024 | Total Suspended Solids (TSS) | < 5 | mg/L | Internal | Qualifying Storm Event | A2540D | 1273222 | |
| Jan 03, 2024 | Total Suspended Solids (TSS) | < 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1273226 | |
| Nov 15, 2023 | Oil and Grease | 7 | mg/L | Internal | Qualifying Storm Event | E1664B | 1269211 | |
| Nov 15, 2023 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1269211 | |
| Nov 15, 2023 | Total Suspended Solids (TSS) | 65 | mg/L | Internal | Qualifying Storm Event | A2540D | 1269211 | |
| Nov 15, 2023 | Total Suspended Solids (TSS) | 280 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1269211 | |
| Aug 21, 2023 | Oil and Grease | 78 | mg/L | Internal | Qualifying Storm Event | E1664B | 1267747 | |
| Aug 21, 2023 | Oil and Grease | 66 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1267747 | |
| Aug 21, 2023 | Total Suspended Solids (TSS) | 5 | mg/L | Internal | Qualifying Storm Event | A2540D | 1267747 | |
| Aug 21, 2023 | Total Suspended Solids (TSS) | 22 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1267747 | |
| Dec 09, 2021 | Oil and Grease | < 5 | mg/L | Internal | Qualifying Storm Event | E1664B | 1198849 | |
| Dec 09, 2021 | Oil and Grease | 16 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1198849 | |
| Dec 09, 2021 | Total Suspended Solids (TSS) | 170 | mg/L | Internal | Qualifying Storm Event | A2540D | 1198849 | |
| Dec 09, 2021 | Total Suspended Solids (TSS) | 220 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1198849 | |
| May 16, 2019 | Oil and Grease | 7.3 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1075372 | |
| May 16, 2019 | Oil and Grease | 1.4 | mg/L | Internal | Qualifying Storm Event | E1664B | 1075372 | |
| May 16, 2019 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | A4500HB | 1075372 | |
| May 16, 2019 | pH | 6.6 | SU | Internal | Qualifying Storm Event | A4500HB | 1075372 | |
| May 16, 2019 | Total Suspended Solids (TSS) | 36 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1075372 |
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 | 6 | 6 Violation · 0 Potential (preliminary) · 0 Dismissed | Sep 24, 2008 – Oct 11, 2022 | Oct 21, 2026 | All violations |
| Enforcement actions | 5 | 5 issued · 0 draft · 0 withdrawn, rescinded or superseded | Sep 24, 2008 – Oct 11, 2022 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Sep 24, 2008 – Sep 24, 2008 | 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 (23 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 15, 2026 | Annual reports | 1335503 | Annual report 2025 | — | |
| Jun 16, 2025 | Annual reports | 1294325 | Annual report 2024 | — | |
| Jul 07, 2024 | Annual reports | 1243413 | Annual report 2023 | — | |
| Jul 07, 2023 | Annual reports | 1189424 | Annual report 2022 | — | |
| Oct 11, 2022 | Enforcement actions | 447954 | NOV (Notice of Violation) | Historical | |
| Oct 11, 2022 | Violations | 883203 | Incomplete/Insufficient SWPPP | Violation | Report |
| Jul 19, 2022 | Annual reports | 1112813 | Annual report 2021 | — | |
| Aug 17, 2021 | Enforcement actions | 441517 | NOV (Notice of Violation) | Historical | |
| Aug 17, 2021 | Violations | 877570 | Incomplete/Insufficient SWPPP | Violation | Report |
| Apr 13, 2021 | Annual reports | 1068827 | Annual report 2020 | — | |
| Nov 11, 2020 | Annual reports | 986099 | Annual report 2019 | — | |
| Oct 23, 2020 | Enforcement actions | 438248 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Oct 23, 2020 | Violations | 874584 | Late Report | Violation | Report |
| Jul 12, 2019 | Annual reports | 953660 | Annual report 2018 | — | |
| Jul 13, 2018 | Annual reports | 939078 | Annual report 2017 | — | |
| Aug 16, 2017 | Annual reports | 878328 | Annual report 2016 | — | |
| Jun 29, 2016 | Annual reports | 845262 | Annual report 2015 | — | |
| May 13, 2010 | Enforcement actions | 403638 | SEL (Staff Enforcement Letter) | Historical | |
| Feb 08, 2009 | Violations | 843299 | Deficient BMP Implementation | Violation | Report |
| Sep 24, 2008 | Enforcement actions | 353773 | NTC (Notice to Comply) | Historical | Field NTC |
| Sep 24, 2008 | Inspections | 1498287 | B Type compliance | — | Additional Info Required |
| Sep 24, 2008 | Violations | 790446 | Incomplete/Insufficient SWPPP | Violation | Inspection |
| Sep 24, 2008 | Violations | 790448 | Deficient BMP Implementation | Violation | Inspection |
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.