Superior Duct Fabrication
Terminated WDID 4 19I023609 Pomona, Los Angeles County Region 4 · Los Angeles
At a glance
- Permit Evidence: SMARTS record
- Terminated 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 jose creek (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
- 302 distinct results, 9 reporting years (2015 to 2024)
- Most recent sample Feb 13, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 3 inspections · 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
- 34.05831, -117.7764
- Precision
- 4 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
- 1683 Mt Vernon Ave, 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
- Terminated
- Operator
- Superior Duct Fabrication Inc
- Primary industry (SIC)
- 3444-Sheet Metal Work
- Application ID
- 426448
- NOI processed
- Apr 24, 2012
- Termination effective
- May 14, 2025
- Last certified
- Jul 12, 2024
- Facility size
- 4 Acres
- Impervious area
- 34 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 426448 | Industrial | Terminated | Apr 24, 2012 | May 14, 2025 | Jul 12, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- san jose creek
- Discharges directly / indirectly
- Y / N (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
5 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.
302 distinct measurements across 13 parameters, most recent sample Feb 13, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2024 | 42 | 7 | 0 | Feb 07, 2025 | Feb 13, 2025 |
| 2022 | 55 | 7 | 0 | Jan 03, 2023 | May 04, 2023 |
| 2021 | 42 | 7 | 0 | Dec 14, 2021 | Mar 28, 2022 |
| 2020 | 41 | 7 | 0 | Jan 29, 2021 | Mar 10, 2021 |
| 2019 | 14 | 7 | 0 | Dec 04, 2019 | Mar 10, 2020 |
| 2018 | 48 | 10 | 0 | Nov 29, 2018 | Mar 06, 2019 |
| 2017 | 4 | 4 | 0 | Mar 21, 2018 | Mar 21, 2018 |
| 2016 | 49 | 7 | 0 | Dec 16, 2016 | Feb 06, 2017 |
| 2015 | 7 | 7 | 0 | Jan 05, 2016 | Jan 05, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Nitrite Plus Nitrate (as N) | mg/L | 43 | 1 | Jan 05, 2016 | Feb 13, 2025 | Results |
| pH | SU | 43 | 0 | Jan 05, 2016 | Feb 13, 2025 | Results |
| Oil and Grease | mg/L | 42 | 29 | Jan 05, 2016 | Feb 13, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 42 | 4 | Jan 05, 2016 | Feb 13, 2025 | Results |
| Aluminum, Total Recoverable | mg/L | 30 | 0 | Jan 05, 2016 | May 04, 2023 | Results |
| Iron, Total Recoverable | mg/L | 30 | 0 | Jan 05, 2016 | May 04, 2023 | Results |
| Zinc, Total Recoverable | mg/L | 30 | 0 | Jan 05, 2016 | May 04, 2023 | Results |
| Aluminum, Total | mg/L | 12 | 0 | Nov 29, 2018 | Feb 13, 2025 | Results |
| Iron, Total | mg/L | 12 | 5 | Nov 29, 2018 | Feb 13, 2025 | Results |
| Zinc, Total | mg/L | 12 | 0 | Nov 29, 2018 | Feb 13, 2025 | Results |
| Aluminum, Dissolved | mg/L | 2 | 0 | Nov 29, 2018 | Nov 29, 2018 | Results |
| Iron, Dissolved | mg/L | 2 | 0 | Nov 29, 2018 | Nov 29, 2018 | Results |
Show 1 more parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Zinc, Dissolved | mg/L | 2 | 0 | Nov 29, 2018 | Nov 29, 2018 | Results |
All results (302 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 13, 2025 | Aluminum, Total | .0953 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327207 | |
| Feb 13, 2025 | Aluminum, Total | .0759 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327207 | |
| Feb 13, 2025 | Aluminum, Total | 1.06 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327207 | |
| Feb 13, 2025 | Aluminum, Total | .112 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327207 | |
| Feb 13, 2025 | Iron, Total | .38 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1327207 | |
| Feb 13, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1327207 | |
| Feb 13, 2025 | Iron, Total | DNQ .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1327207 | |
| Feb 13, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1327207 | |
| Feb 13, 2025 | Nitrite Plus Nitrate (as N) | .21 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1327207 | |
| Feb 13, 2025 | Nitrite Plus Nitrate (as N) | DNQ .08 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1327207 | |
| Feb 13, 2025 | Nitrite Plus Nitrate (as N) | .1 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1327207 | |
| Feb 13, 2025 | Nitrite Plus Nitrate (as N) | .36 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1327207 | |
| Feb 13, 2025 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327207 | |
| Feb 13, 2025 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327207 | |
| Feb 13, 2025 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327207 | |
| Feb 13, 2025 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327207 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1327207 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1327207 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1327207 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1327207 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 38 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327207 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 69 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327207 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 86 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327207 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 12 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327207 | |
| Feb 13, 2025 | Zinc, Total | .235 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327207 | |
| Feb 13, 2025 | Zinc, Total | 2.98 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327207 | |
| Feb 13, 2025 | Zinc, Total | .128 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327207 | |
| Feb 13, 2025 | Zinc, Total | .664 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327207 | |
| Feb 07, 2025 | Aluminum, Total | .0925 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327203 | |
| Feb 07, 2025 | Aluminum, Total | .0304 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327203 | |
| Feb 07, 2025 | Iron, Total | DNQ .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1327203 | |
| Feb 07, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1327203 | |
| Feb 07, 2025 | Nitrite Plus Nitrate (as N) | .3 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1327203 | |
| Feb 07, 2025 | Nitrite Plus Nitrate (as N) | .1 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1327203 | |
| Feb 07, 2025 | Oil and Grease | 7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327203 | |
| Feb 07, 2025 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327203 | |
| Feb 07, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1327203 | |
| Feb 07, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1327203 | |
| Feb 07, 2025 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327203 | |
| Feb 07, 2025 | Total Suspended Solids (TSS) | < .4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327203 | |
| Feb 07, 2025 | Zinc, Total | .686 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327203 | |
| Feb 07, 2025 | Zinc, Total | .0741 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327203 | |
| May 04, 2023 | Aluminum, Total Recoverable | .058 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1237938 | |
| May 04, 2023 | Aluminum, Total Recoverable | .22 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1237938 | |
| May 04, 2023 | Iron, Total Recoverable | .062 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1237938 | |
| May 04, 2023 | Iron, Total Recoverable | .36 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1237938 | |
| May 04, 2023 | Nitrite Plus Nitrate (as N) | .081 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1237938 | |
| May 04, 2023 | Nitrite Plus Nitrate (as N) | .13 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1237938 | |
| May 04, 2023 | Oil and Grease | ND 3.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1237938 | |
| May 04, 2023 | pH | 8.2 | SU | Effluent | Qualifying Storm Event | A4500HB | 1237938 |
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 | Aug 15, 2017 – Sep 25, 2018 | Oct 21, 2026 | All violations |
| Enforcement actions | 2 | 2 issued · 0 draft · 0 withdrawn, rescinded or superseded | Sep 19, 2017 – Sep 25, 2018 | Oct 21, 2026 | All actions |
| Inspections | 3 | inspections, not findings | Jun 01, 2017 – Sep 27, 2018 | Oct 21, 2026 | All inspections |
| Annual reports | 10 | certified reports (contents not shown) | 2015 – 2024 | 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 (17 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| May 14, 2025 | Annual reports | 1296849 | Annual report 2024 | — | |
| Jul 22, 2024 | Annual reports | 1246078 | Annual report 2023 | — | |
| Jun 30, 2023 | Annual reports | 1192215 | Annual report 2022 | — | |
| Jul 15, 2022 | Annual reports | 1115862 | Annual report 2021 | — | |
| Jul 13, 2021 | Annual reports | 1063988 | Annual report 2020 | — | |
| Jul 13, 2020 | Annual reports | 980929 | Annual report 2019 | — | |
| Jul 02, 2019 | Annual reports | 957213 | Annual report 2018 | — | |
| Sep 27, 2018 | Inspections | 2040090 | B Type compliance | — | No Further Action |
| Sep 25, 2018 | Enforcement actions | 430886 | Verbal Communication | Historical | |
| Sep 25, 2018 | Violations | 868117 | Deficient BMP Implementation | Violation | Inspection |
| Jul 06, 2018 | Annual reports | 942646 | Annual report 2017 | — | |
| Sep 19, 2017 | Enforcement actions | 426911 | NOV (Notice of Violation) | Historical | |
| Aug 15, 2017 | Inspections | 2034845 | B Type compliance | — | Additional Info Required |
| Aug 15, 2017 | Violations | 864116 | Deficient BMP Implementation | Violation | Inspection |
| Jun 01, 2017 | Inspections | 2033952 | B Type compliance | — | No Further Action |
| May 26, 2017 | Annual reports | 882126 | Annual report 2016 | — | |
| Jun 20, 2016 | Annual reports | 843785 | Annual report 2015 | — |
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.