CA Amforge
Active WDID 4 19I001029 Azusa, 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
- Azusa, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Little Dalton Wash (as reported by the facility)
- Evidence: identification corroborated Little Dalton Wash Details
- Identified receiving water on the 2026 303(d) list
- Yes · 5 Appendix A decisions, category 5 Evidence: State-published
- Describes the waterbody, not this facility · Waterbody profile
- 2026 Integrated Report waters within 1.0 km Evidence: geographic proximity
- None
- Monitoring results Evidence: facility-reported
- 528 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Feb 17, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 2 inspections · 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
- 34.13555, -117.91535
- 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
- 750 N Vernon Ave, Azusa 91702
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Big Dalton Wash HUC12 180701060402
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
- California Amforge Corporation
- Primary industry (SIC)
- 3462-Iron and Steel Forgings
- Application ID
- 188736
- NOI processed
- Mar 25, 1992
- Last certified
- Mar 18, 2024
- Facility size
- 6 Acres
- Impervious area
- 10 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 188736 | Industrial | Active | Mar 25, 1992 | — | Mar 18, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Little Dalton Wash
- Discharges directly / indirectly
- Y / N (as answered in the permit application)
Evidence: identification corroborated Little Dalton Wash CAR4052000020210323060989
Receiving water reported by facility — waterbody identification corroborated by geographic evidence.
Nearest distance from the reported facility location: 1.6 km. Method receiving_water/2.
2026 Integrated Report status Evidence: State-published
Little Dalton Wash is on the 2026 Clean Water Act section 303(d) list (5 Appendix A decisions; category 5).
| Pollutant | Category | Listing decision | TMDL requirement | Decision ID |
|---|---|---|---|---|
| alpha-Endosulfan (Endosulfan 1) | 5 | List on 303(d) list (TMDL required list) | 5A | 140194 |
| Copper | 5 | List on 303(d) list (TMDL required list) | 5A | 140193 |
| Indicator Bacteria | 5 | List on 303(d) list (TMDL required list) | 5A | 150296 |
| Lead | 5 | List on 303(d) list (TMDL required list) | 5A | 140198 |
| Zinc | 5 | List on 303(d) list (TMDL required list) | 5A | 140206 |
Published by the State Water Resources Control Board (2026 California Integrated Report, Appendix A). Listing status is taken from Appendix A only. State Board adoption 2026-02-03; USEPA approval not confirmed. A listing describes the waterbody, not this facility. Waterbody profile.
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.
528 distinct measurements across 9 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 | 16 | 8 | 0 | Feb 17, 2026 | Feb 17, 2026 |
| 2024 | 18 | 9 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2023 | 36 | 9 | 0 | Aug 20, 2023 | Jan 22, 2024 |
| 2022 | 63 | 9 | 0 | Feb 22, 2023 | Mar 22, 2023 |
| 2021 | 54 | 9 | 0 | Dec 14, 2021 | Mar 28, 2022 |
| 2020 | 54 | 9 | 0 | Jan 29, 2021 | Mar 15, 2021 |
| 2019 | 81 | 9 | 0 | Nov 20, 2019 | Apr 06, 2020 |
| 2018 | 54 | 9 | 0 | Dec 06, 2018 | Feb 14, 2019 |
| 2017 | 32 | 8 | 0 | Jan 08, 2018 | Mar 21, 2018 |
| 2016 | 64 | 8 | 0 | Dec 15, 2016 | Jan 20, 2017 |
| 2015 | 56 | 7 | 0 | Sep 09, 2015 | Feb 18, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Aluminum, Total | mg/L | 62 | 0 | Sep 09, 2015 | Feb 17, 2026 | Results |
| Iron, Total | mg/L | 62 | 0 | Sep 09, 2015 | Feb 17, 2026 | Results |
| Oil and Grease | mg/L | 62 | 41 | Sep 09, 2015 | Feb 17, 2026 | Results |
| pH | SU | 62 | 0 | Sep 09, 2015 | Feb 17, 2026 | Results |
| Zinc, Total | mg/L | 62 | 0 | Sep 09, 2015 | Feb 17, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 60 | 4 | Sep 09, 2015 | Feb 13, 2025 | Results |
| Copper, Total | mg/L | 54 | 5 | Dec 15, 2016 | Feb 17, 2026 | Results |
| Nickel, Total | mg/L | 54 | 5 | Dec 15, 2016 | Feb 17, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 50 | 5 | Sep 09, 2015 | Feb 17, 2026 | Results |
All results (528 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 17, 2026 | Aluminum, Total | .93 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376862 | |
| Feb 17, 2026 | Aluminum, Total | .27 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376862 | |
| Feb 17, 2026 | Copper, Total | .022 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376862 | |
| Feb 17, 2026 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376862 | |
| Feb 17, 2026 | Iron, Total | 2.7 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376862 | |
| Feb 17, 2026 | Iron, Total | .52 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376862 | |
| Feb 17, 2026 | Nickel, Total | .027 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376862 | |
| Feb 17, 2026 | Nickel, Total | .0085 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376862 | |
| Feb 17, 2026 | Nitrite Plus Nitrate (as N) | .47 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1376862 | |
| Feb 17, 2026 | Nitrite Plus Nitrate (as N) | .29 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1376862 | |
| Feb 17, 2026 | Oil and Grease | 4.8 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1376862 | |
| Feb 17, 2026 | Oil and Grease | 20 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1376862 | |
| Feb 17, 2026 | pH | 6.54 | SU | Effluent | Qualifying Storm Event | pH_Field | 1376862 | |
| Feb 17, 2026 | pH | 6.75 | SU | Effluent | Qualifying Storm Event | pH_Field | 1376862 | |
| Feb 17, 2026 | Zinc, Total | .25 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376862 | |
| Feb 17, 2026 | Zinc, Total | .45 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376862 | |
| Feb 13, 2025 | Aluminum, Total | .59 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325485 | |
| Feb 13, 2025 | Aluminum, Total | .1 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325485 | |
| Feb 13, 2025 | Copper, Total | .017 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325485 | |
| Feb 13, 2025 | Copper, Total | DNQ .0033 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325485 | |
| Feb 13, 2025 | Iron, Total | 1.5 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325485 | |
| Feb 13, 2025 | Iron, Total | .17 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325485 | |
| Feb 13, 2025 | Nickel, Total | .019 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325485 | |
| Feb 13, 2025 | Nickel, Total | DNQ .0036 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325485 | |
| Feb 13, 2025 | Nitrite Plus Nitrate (as N) | .31 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1325485 | |
| Feb 13, 2025 | Nitrite Plus Nitrate (as N) | .2 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1325485 | |
| Feb 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1325485 | |
| Feb 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1325485 | |
| Feb 13, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1325485 | |
| Feb 13, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1325485 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 35 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1325485 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1325485 | |
| Feb 13, 2025 | Zinc, Total | .017 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325485 | |
| Feb 13, 2025 | Zinc, Total | .19 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1325485 | |
| Jan 22, 2024 | Aluminum, Total | .75 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1281269 | |
| Jan 22, 2024 | Aluminum, Total | .04 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1281269 | |
| Jan 22, 2024 | Copper, Total | .015 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1281269 | |
| Jan 22, 2024 | Copper, Total | .002 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1281269 | |
| Jan 22, 2024 | Iron, Total | 1.2 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1281269 | |
| Jan 22, 2024 | Iron, Total | .14 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1281269 | |
| Jan 22, 2024 | Nickel, Total | .0066 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1281269 | |
| Jan 22, 2024 | Nickel, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1281269 | |
| Jan 22, 2024 | Nitrite Plus Nitrate (as N) | .4 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1281269 | |
| Jan 22, 2024 | Nitrite Plus Nitrate (as N) | .12 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1281269 | |
| Jan 22, 2024 | Oil and Grease | 1.6 | mg/L | Effluent | Qualifying Storm Event | A5520B | 1281269 | |
| Jan 22, 2024 | Oil and Grease | 1.2 | mg/L | Effluent | Qualifying Storm Event | A5520B | 1281269 | |
| Jan 22, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1281269 | |
| Jan 22, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1281269 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 34 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1281269 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1281269 |
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 | Nov 15, 2001 – Feb 01, 2023 | Oct 21, 2026 | All violations |
| Enforcement actions | 5 | 5 issued · 0 draft · 0 withdrawn, rescinded or superseded | Jan 30, 2002 – Feb 01, 2023 | Oct 21, 2026 | All actions |
| Inspections | 2 | inspections, not findings | Nov 15, 2001 – Jun 06, 2002 | 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 (24 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 15, 2026 | Annual reports | 1334289 | Annual report 2025 | — | |
| Jul 14, 2025 | Annual reports | 1293064 | Annual report 2024 | — | |
| Jul 12, 2024 | Annual reports | 1242073 | Annual report 2023 | — | |
| Jul 12, 2023 | Annual reports | 1188015 | Annual report 2022 | — | |
| Feb 01, 2023 | Enforcement actions | 449321 | NOV (Notice of Violation) | Historical | |
| Feb 01, 2023 | Violations | 884363 | Late Report | Violation | Report |
| Jul 11, 2022 | Annual reports | 1111287 | Annual report 2021 | — | |
| Jul 19, 2021 | Annual reports | 1067232 | Annual report 2020 | — | |
| Jul 10, 2020 | Annual reports | 984397 | Annual report 2019 | — | |
| Jul 03, 2019 | Annual reports | 951905 | Annual report 2018 | — | |
| Feb 28, 2019 | Enforcement actions | 432535 | NOV (Notice of Violation) | Historical | |
| Feb 28, 2019 | Violations | 869460 | Late Report | Violation | Report |
| Feb 26, 2019 | Enforcement actions | 432517 | NOV (Notice of Violation) | Historical | |
| Jan 01, 2019 | Violations | 869448 | Late Report | Violation | Report |
| Dec 11, 2018 | Annual reports | 937316 | Annual report 2017 | — | |
| Jun 27, 2017 | Annual reports | 876471 | Annual report 2016 | — | |
| Jun 15, 2016 | Annual reports | 840676 | Annual report 2015 | — | |
| Jul 19, 2010 | Enforcement actions | 404371 | SEL (Staff Enforcement Letter) | Historical | |
| Nov 26, 2008 | Violations | 843690 | Deficient BMP Implementation | Violation | Report |
| Jun 06, 2002 | Inspections | 1735672 | Enforcement Follow-up | — | |
| Jan 30, 2002 | Enforcement actions | 240111 | NOV (Notice of Violation) | Historical | UNKNOWN |
| Nov 15, 2001 | Inspections | 1735671 | B Type compliance | — | |
| Nov 15, 2001 | Violations | 199046 | Deficient BMP Implementation | Violation | Inspection |
| Nov 15, 2001 | Violations | 199047 | 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.