Mohawk Western Plastics Inc
Active WDID 4 19I022754 La Verne, 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
- La Verne, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Live Oak Wash (as reported by the facility)
- Evidence: identification corroborated Live Oak Wash Details
- Identified receiving water on the 2026 303(d) list
- Yes · 2 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
- 2 waterbodies; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 132 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Feb 16, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 5 inspections · 4 violation records · 4 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
- 34.10029, -117.78149
- Precision
- 5 decimal places
- Shared point
- 2 permits report this exact point
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 1496 Arrow Highway, La Verne 91750
- 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
- Mohawk Western Plastics Inc
- Primary industry (SIC)
- 3081-Unsupported Plastics Film and Sheet
- Application ID
- 405878
- NOI processed
- Jul 27, 2010
- Last certified
- Jun 16, 2015
- Facility size
- 3 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 405878 | Industrial | Active | Jul 27, 2010 | — | Jun 16, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Live Oak Wash
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: identification corroborated Live Oak Wash CAR4055300020210323061971
Receiving water reported by facility — waterbody identification corroborated by geographic evidence.
Nearest distance from the reported facility location: 601 m. Method receiving_water/2.
2026 Integrated Report status Evidence: State-published
Live Oak Wash is on the 2026 Clean Water Act section 303(d) list (2 Appendix A decisions; category 5).
| Pollutant | Category | Listing decision | TMDL requirement | Decision ID |
|---|---|---|---|---|
| Copper | 5 | List on 303(d) list (TMDL required list) | 5A | 140233 |
| Indicator Bacteria | 5 | List on 303(d) list (TMDL required list) | 5A | 150297 |
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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Live Oak Wash CAR4055300020210323061971 | 601 m | listed | 2 |
| Emerald Creek CAR4055300020210323062318 | 841 m | not listed | 0 |
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.
132 distinct measurements across 3 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 | 12 | 3 | 0 | Oct 14, 2025 | Feb 16, 2026 |
| 2024 | 6 | 3 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2023 | 6 | 3 | 0 | Feb 01, 2024 | Feb 01, 2024 |
| 2022 | 12 | 3 | 0 | Nov 07, 2022 | Feb 23, 2023 |
| 2021 | 12 | 3 | 0 | Dec 09, 2021 | Mar 28, 2022 |
| 2020 | 6 | 3 | 0 | Dec 28, 2020 | Dec 28, 2020 |
| 2019 | 12 | 3 | 0 | Nov 20, 2019 | Mar 10, 2020 |
| 2018 | 18 | 3 | 0 | Nov 29, 2018 | Feb 14, 2019 |
| 2017 | 12 | 3 | 0 | Jan 08, 2018 | Mar 21, 2018 |
| 2016 | 18 | 3 | 0 | Dec 21, 2016 | Feb 06, 2017 |
| 2015 | 18 | 3 | 0 | Dec 11, 2015 | Mar 11, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 44 | 30 | Dec 11, 2015 | Feb 16, 2026 | Results |
| pH | SU | 44 | 0 | Dec 11, 2015 | Feb 16, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 44 | 7 | Dec 11, 2015 | Feb 16, 2026 | Results |
All results (132 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 16, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1369186 | |
| Feb 16, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1369186 | |
| Feb 16, 2026 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1369186 | |
| Feb 16, 2026 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1369186 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1369186 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1369186 | |
| Oct 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1361829 | |
| Oct 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1361829 | |
| Oct 14, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1361829 | |
| Oct 14, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1361829 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | 5.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361829 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361829 | |
| Feb 13, 2025 | Oil and Grease | 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327545 | |
| Feb 13, 2025 | Oil and Grease | 4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327545 | |
| Feb 13, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1327545 | |
| Feb 13, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1327545 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 12 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327545 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 20 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327545 | |
| Feb 01, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1283907 | |
| Feb 01, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1283907 | |
| Feb 01, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1283907 | |
| Feb 01, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1283907 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1283907 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1283907 | |
| Feb 23, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1236910 | |
| Feb 23, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1236910 | |
| Feb 23, 2023 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1236910 | |
| Feb 23, 2023 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1236910 | |
| Feb 23, 2023 | Total Suspended Solids (TSS) | 8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1236910 | |
| Feb 23, 2023 | Total Suspended Solids (TSS) | 7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1236910 | |
| Nov 07, 2022 | Oil and Grease | 3.6 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1217085 | |
| Nov 07, 2022 | Oil and Grease | 4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1217085 | |
| Nov 07, 2022 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1217085 | |
| Nov 07, 2022 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1217085 | |
| Nov 07, 2022 | Total Suspended Solids (TSS) | 55.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1217085 | |
| Nov 07, 2022 | Total Suspended Solids (TSS) | 30.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1217085 | |
| Mar 28, 2022 | Oil and Grease | 3.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1187127 | |
| Mar 28, 2022 | Oil and Grease | 3.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1187127 | |
| Mar 28, 2022 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1187127 | |
| Mar 28, 2022 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1187127 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | 19.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1187127 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | 17.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1187127 | |
| Dec 09, 2021 | Oil and Grease | 6.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1187126 | |
| Dec 09, 2021 | Oil and Grease | 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1187126 | |
| Dec 09, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1187126 | |
| Dec 09, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1187126 | |
| Dec 09, 2021 | Total Suspended Solids (TSS) | 218 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1187126 | |
| Dec 09, 2021 | Total Suspended Solids (TSS) | 14.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1187126 | |
| Dec 28, 2020 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1140047 | |
| Dec 28, 2020 | Oil and Grease | 2.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1140047 |
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 | 4 | 4 Violation · 0 Potential (preliminary) · 0 Dismissed | Oct 18, 2010 – Apr 11, 2011 | Oct 21, 2026 | All violations |
| Enforcement actions | 4 | 4 issued · 0 draft · 0 withdrawn, rescinded or superseded | Nov 12, 2010 – Oct 03, 2011 | Oct 21, 2026 | All actions |
| Inspections | 5 | inspections, not findings | Oct 18, 2010 – Nov 15, 2011 | 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 13, 2026 | Annual reports | 1337712 | Annual report 2025 | — | |
| Jul 08, 2025 | Annual reports | 1296637 | Annual report 2024 | — | |
| Jul 08, 2024 | Annual reports | 1245857 | Annual report 2023 | — | |
| Jun 29, 2023 | Annual reports | 1191986 | Annual report 2022 | — | |
| Jul 13, 2022 | Annual reports | 1115604 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1063712 | Annual report 2020 | — | |
| Jul 07, 2020 | Annual reports | 980628 | Annual report 2019 | — | |
| Jul 09, 2019 | Annual reports | 956902 | Annual report 2018 | — | |
| Jul 13, 2018 | Annual reports | 942334 | Annual report 2017 | — | |
| Jul 13, 2017 | Annual reports | 881790 | Annual report 2016 | — | |
| Jul 15, 2016 | Annual reports | 844596 | Annual report 2015 | — | |
| Nov 15, 2011 | Inspections | 2013294 | Enforcement Follow-up | — | Follow-up Inspection Needed |
| Oct 03, 2011 | Enforcement actions | 406388 | CAO (Cleanup and Abatement Order) | Historical | |
| Apr 11, 2011 | Inspections | 2011441 | Enforcement Follow-up | — | Additional Info Required |
| Apr 11, 2011 | Violations | 844653 | Deficient BMP Implementation | Violation | Inspection |
| Jan 25, 2011 | Enforcement actions | 403644 | NOV (Notice of Violation) | Historical | |
| Jan 05, 2011 | Inspections | 2010181 | Enforcement Follow-up | — | Follow-up Inspection Needed |
| Jan 05, 2011 | Violations | 844716 | Deficient BMP Implementation | Violation | Inspection |
| Dec 23, 2010 | Enforcement actions | 403458 | Verbal Communication | Historical | |
| Dec 23, 2010 | Inspections | 2009887 | Enforcement Follow-up | — | Additional Info Required |
| Dec 23, 2010 | Violations | 844715 | Deficient BMP Implementation | Violation | Inspection |
| Nov 12, 2010 | Enforcement actions | 403089 | NOV (Notice of Violation) | Historical | |
| Oct 18, 2010 | Inspections | 2009126 | B Type compliance | — | Additional Info Required |
| Oct 18, 2010 | Violations | 842841 | Incomplete/Insufficient SWPPP | 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.