Miller Castings Inc
Active WDID 4 19I022672 Whittier, 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
- Whittier, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- San Gabriel River (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
- 2 waterbodies; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 774 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Feb 16, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 2 inspections · 2 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
- 34.03017, -118.03936
- 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
- 2503 Pacific Park Dr, Whittier 90601
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Coyote Creek-San Gabriel River HUC12 180701060606
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
- Miller Castings Inc
- Primary industry (SIC)
- 3324-Steel Investment Foundries
- Application ID
- 403704
- NOI processed
- Jun 15, 2010
- Last certified
- Jun 01, 2023
- Facility size
- 74638 SqFt
- Impervious area
- 60 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 403704 | Industrial | Active | Jun 15, 2010 | — | Jun 01, 2023 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- San Gabriel River
- 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
10 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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| San Gabriel River Reach 3 (Whittier Narrows to Ramona) CAR4053100019980917153706 | 289 m | listed | 2 |
| Zone Ditch 1 (LA River Watershed) CAR4053100020110406151505 | 394 m | not listed | 0 |
Waterbodies within 1.0 km of the reported facility location. Method proximity/1.
SMARTS TMDL records Evidence: SMARTS-reported
SMARTS TMDL record as reported for this facility; it is not a determination that the TMDL applies to the facility.
| TMDL | Waterbody (as reported) | Parameter | Limit | Type | Period | Due | Discharges to TMDL water |
|---|---|---|---|---|---|---|---|
| R4 - San Gabriel River Metals and Selenium TMDL | San Gabriel River Reach 2 and its tributary/ies | Lead, Total | .166 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
1 record. Links between these records and specific TMDL projects or listed waterbodies have not been reviewed and are not shown.
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.
774 distinct measurements across 10 parameters, most recent sample Feb 16, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 72 | 9 | 0 | Oct 14, 2025 | Feb 16, 2026 |
| 2024 | 36 | 9 | 0 | Feb 13, 2025 | Mar 05, 2025 |
| 2023 | 72 | 9 | 0 | Nov 15, 2023 | Feb 19, 2024 |
| 2022 | 72 | 9 | 0 | Nov 08, 2022 | Mar 21, 2023 |
| 2021 | 36 | 9 | 0 | Oct 25, 2021 | Dec 23, 2021 |
| 2020 | 54 | 9 | 0 | Jan 28, 2021 | Mar 15, 2021 |
| 2019 | 90 | 9 | 0 | Nov 20, 2019 | Apr 06, 2020 |
| 2018 | 90 | 9 | 0 | Nov 29, 2018 | Mar 06, 2019 |
| 2017 | 54 | 9 | 0 | Jan 09, 2018 | Mar 21, 2018 |
| 2016 | 114 | 10 | 0 | Dec 16, 2016 | Jan 19, 2017 |
| 2015 | 84 | 7 | 0 | Sep 15, 2015 | May 06, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Aluminum, Total | mg/L | 88 | 1 | Sep 15, 2015 | Feb 16, 2026 | Results |
| Copper, Total | mg/L | 88 | 2 | Sep 15, 2015 | Feb 16, 2026 | Results |
| Iron, Total | mg/L | 88 | 11 | Sep 15, 2015 | Feb 16, 2026 | Results |
| Oil and Grease | mg/L | 88 | 82 | Sep 15, 2015 | Feb 16, 2026 | Results |
| pH | SU | 88 | 0 | Sep 15, 2015 | Feb 16, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 88 | 6 | Sep 15, 2015 | Feb 16, 2026 | Results |
| Zinc, Total | mg/L | 88 | 0 | Sep 15, 2015 | Feb 16, 2026 | Results |
| Lead, Total | mg/L | 73 | 36 | Dec 21, 2016 | Feb 16, 2026 | Results |
| Nickel, Total | mg/L | 73 | 5 | Dec 21, 2016 | Feb 16, 2026 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 12 | 0 | Dec 16, 2016 | Jan 19, 2017 | Results |
All results (774 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 16, 2026 | Aluminum, Total | .77 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370217 | |
| Feb 16, 2026 | Aluminum, Total | .38 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370217 | |
| Feb 16, 2026 | Copper, Total | .018 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370217 | |
| Feb 16, 2026 | Copper, Total | .0061 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370217 | |
| Feb 16, 2026 | Iron, Total | 1.05 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1370217 | |
| Feb 16, 2026 | Iron, Total | .514 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1370217 | |
| Feb 16, 2026 | Lead, Total | DNQ .0036 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370217 | |
| Feb 16, 2026 | Lead, Total | DNQ .0014 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370217 | |
| Feb 16, 2026 | Nickel, Total | .031 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370217 | |
| Feb 16, 2026 | Nickel, Total | .017 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370217 | |
| Feb 16, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370217 | |
| Feb 16, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370217 | |
| Feb 16, 2026 | pH | 8.88 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370217 | |
| Feb 16, 2026 | pH | 8.99 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370217 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 36 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370217 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 12 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370217 | |
| Feb 16, 2026 | Zinc, Total | .176 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370217 | |
| Feb 16, 2026 | Zinc, Total | .0779 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370217 | |
| Nov 20, 2025 | Aluminum, Total | .12 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363364 | |
| Nov 20, 2025 | Aluminum, Total | .095 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363364 | |
| Nov 20, 2025 | Copper, Total | .088 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363364 | |
| Nov 20, 2025 | Copper, Total | .056 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363364 | |
| Nov 20, 2025 | Iron, Total | .186 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1363364 | |
| Nov 20, 2025 | Iron, Total | .107 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1363364 | |
| Nov 20, 2025 | Lead, Total | .00061 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363364 | |
| Nov 20, 2025 | Lead, Total | .00097 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363364 | |
| Nov 20, 2025 | Nickel, Total | .0024 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363364 | |
| Nov 20, 2025 | Nickel, Total | .0024 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363364 | |
| Nov 20, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1363364 | |
| Nov 20, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1363364 | |
| Nov 20, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1363364 | |
| Nov 20, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1363364 | |
| Nov 20, 2025 | Total Suspended Solids (TSS) | 30 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1363364 | |
| Nov 20, 2025 | Total Suspended Solids (TSS) | 42 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1363364 | |
| Nov 20, 2025 | Zinc, Total | .469 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363364 | |
| Nov 20, 2025 | Zinc, Total | .0755 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363364 | |
| Nov 14, 2025 | Aluminum, Total | .1 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363311 | |
| Nov 14, 2025 | Aluminum, Total | .18 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363311 | |
| Nov 14, 2025 | Copper, Total | .087 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363311 | |
| Nov 14, 2025 | Copper, Total | .066 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363311 | |
| Nov 14, 2025 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1363311 | |
| Nov 14, 2025 | Iron, Total | .13 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1363311 | |
| Nov 14, 2025 | Lead, Total | DNQ .00053 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363311 | |
| Nov 14, 2025 | Lead, Total | DNQ .0011 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363311 | |
| Nov 14, 2025 | Nickel, Total | DNQ .0047 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363311 | |
| Nov 14, 2025 | Nickel, Total | .0097 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1363311 | |
| Nov 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1363311 | |
| Nov 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1363311 | |
| Nov 14, 2025 | pH | 8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1363311 | |
| Nov 14, 2025 | pH | 8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1363311 |
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 01, 2011 – Jul 01, 2013 | Oct 21, 2026 | All violations |
| Enforcement actions | 3 | 3 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 10, 2012 – Apr 09, 2014 | Oct 21, 2026 | All actions |
| Inspections | 2 | inspections, not findings | Apr 09, 2014 – Feb 02, 2024 | 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 (18 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 13, 2026 | Annual reports | 1337607 | Annual report 2025 | — | |
| Jul 14, 2025 | Annual reports | 1296529 | Annual report 2024 | — | |
| Jul 15, 2024 | Annual reports | 1245741 | Annual report 2023 | — | |
| Feb 02, 2024 | Inspections | 2063443 | B Type compliance | Finalized | Additional Info Required |
| Jul 06, 2023 | Annual reports | 1191862 | Annual report 2022 | — | |
| Aug 09, 2022 | Annual reports | 1115465 | Annual report 2021 | — | |
| Apr 30, 2021 | Annual reports | 1063566 | Annual report 2020 | — | |
| Jul 14, 2020 | Annual reports | 980471 | Annual report 2019 | — | |
| Jul 10, 2019 | Annual reports | 956737 | Annual report 2018 | — | |
| Jul 02, 2018 | Annual reports | 942167 | Annual report 2017 | — | |
| Jul 06, 2017 | Annual reports | 881590 | Annual report 2016 | — | |
| Jul 13, 2016 | Annual reports | 847503 | Annual report 2015 | — | |
| Apr 09, 2014 | Enforcement actions | 415305 | NTC (Notice to Comply) | Historical | |
| Apr 09, 2014 | Inspections | 2021934 | Non-compliance Follow-up | — | Additional Info Required |
| Jul 01, 2013 | Violations | 853689 | Late Report | Violation | Report |
| May 21, 2013 | Enforcement actions | 412265 | NOV (Notice of Violation) | Historical | |
| Aug 10, 2012 | Enforcement actions | 409386 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 01, 2011 | Violations | 848546 | Late 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.