ReadyRefresh Chatsworth
Active WDID 4 19I025630 Chatsworth, 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
- Chatsworth, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Aliso Canyon Wash (as reported by the facility)
- Evidence: identification corroborated Aliso Canyon Wash Details
- Identified receiving water on the 2026 303(d) list
- Yes · 3 Appendix A decisions, category 4a 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
- 206 distinct results, 9 reporting years (2015 to 2025)
- Most recent sample Feb 17, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 0 violation records · 0 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
- 34.24143, -118.57938
- 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
- 9400 North Mason Ave, Chatsworth 91311
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Aliso Canyon Wash HUC12 180701050203
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
- BlueTriton Brands Inc
- Primary industry (SIC)
- 4214-Local Trucking with Storage
- Application ID
- 456495
- NOI processed
- Jun 23, 2015
- Last certified
- Jan 16, 2026
- Facility size
- 2.02 Acres
- Impervious area
- 100 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 456495 | Industrial | Active | Jun 23, 2015 | — | Jan 16, 2026 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Aliso Canyon Wash
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: identification corroborated Aliso Canyon Wash CAR4052100019990201130918
Receiving water reported by facility — waterbody identification corroborated by geographic evidence.
Nearest distance from the reported facility location: 3.0 km. Method receiving_water/2.
2026 Integrated Report status Evidence: State-published
Aliso Canyon Wash is on the 2026 Clean Water Act section 303(d) list (3 Appendix A decisions; category 4a).
| Pollutant | Category | Listing decision | TMDL requirement | Decision ID |
|---|---|---|---|---|
| Copper | 4a | List on 303(d) list (being addressed by USEPA approved TMDL) | 5B · Los Angeles River Metals (13) | 68182 |
| Indicator Bacteria | 4a | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | 5B · Los Angeles River Pathogens (15) | 150265 |
| Selenium | 4a | List on 303(d) list (being addressed by USEPA approved TMDL) | 5B · Los Angeles River Metals (13) | 69691 |
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
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 |
|---|---|---|---|---|---|---|---|
| Los Angeles River Metals TMDL | Los Angeles River and Los Angeles River Tributaries | Copper, Total | .06749 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Metals TMDL | Los Angeles River and Los Angeles River Tributaries | Lead, Total | .094 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Metals TMDL | Los Angeles River and Los Angeles River Tributaries | Zinc, Total | .159 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Nitrogen TMDL | Los Angeles River Tributaries | Ammonia, Total (as N) | 10.1 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Nitrogen TMDL | Los Angeles River Watershed | Nitrate, Total (as N) | 8 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Nitrogen TMDL | Los Angeles River Watershed | Nitrite Plus Nitrate (as N) | 8 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Nitrogen TMDL | Los Angeles River Watershed | Nitrite, Total (as N) | 1 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
7 records. 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.
206 distinct measurements across 10 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 | 20 | 10 | 0 | Feb 16, 2026 | Feb 17, 2026 |
| 2024 | 58 | 10 | 0 | Feb 13, 2025 | Mar 13, 2025 |
| 2023 | 60 | 10 | 0 | Dec 21, 2023 | Feb 05, 2024 |
| 2021 | 20 | 10 | 0 | Oct 25, 2021 | Dec 14, 2021 |
| 2020 | 20 | 10 | 0 | Jan 29, 2021 | Jan 29, 2021 |
| 2018 | 9 | 3 | 0 | Nov 28, 2018 | Feb 04, 2019 |
| 2017 | 6 | 3 | 0 | Jan 09, 2018 | Mar 02, 2018 |
| 2016 | 6 | 3 | 0 | Dec 16, 2016 | Jan 19, 2017 |
| 2015 | 7 | 3 | 0 | Sep 15, 2015 | Feb 18, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| pH | SU | 28 | 0 | Sep 15, 2015 | Feb 17, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 28 | 2 | Sep 15, 2015 | Feb 17, 2026 | Results |
| Oil and Grease | mg/L | 26 | 13 | Feb 18, 2016 | Feb 17, 2026 | Results |
| Ammonia, Total (as N) | mg/L | 18 | 1 | Jan 29, 2021 | Feb 17, 2026 | Results |
| Copper, Total | mg/L | 18 | 11 | Jan 29, 2021 | Feb 17, 2026 | Results |
| Nitrate, Total (as N) | mg/L | 18 | 10 | Jan 29, 2021 | Feb 17, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 18 | 10 | Jan 29, 2021 | Feb 17, 2026 | Results |
| Nitrite, Total (as N) | mg/L | 18 | 18 | Jan 29, 2021 | Feb 17, 2026 | Results |
| Zinc, Total | mg/L | 18 | 0 | Jan 29, 2021 | Feb 17, 2026 | Results |
| Lead, Total | mg/L | 16 | 11 | Jan 29, 2021 | Feb 17, 2026 | Results |
All results (206 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 17, 2026 | Ammonia, Total (as N) | .13 | mg/L | Effluent | Qualifying Storm Event | A4500NHF | 1367100 | |
| Feb 17, 2026 | Copper, Total | DNQ .0015 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367100 | |
| Feb 17, 2026 | Lead, Total | DNQ .00054 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367100 | |
| Feb 17, 2026 | Nitrate, Total (as N) | DNQ .1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1367100 | |
| Feb 17, 2026 | Nitrite Plus Nitrate (as N) | DNQ .1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1367100 | |
| Feb 17, 2026 | Nitrite, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1367100 | |
| Feb 17, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1367100 | |
| Feb 17, 2026 | pH | 7.02 | SU | Effluent | Qualifying Storm Event | pH_Field | 1367100 | |
| Feb 17, 2026 | Total Suspended Solids (TSS) | 8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1367100 | |
| Feb 17, 2026 | Zinc, Total | .048 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367100 | |
| Feb 16, 2026 | Ammonia, Total (as N) | .14 | mg/L | Effluent | Qualifying Storm Event | A4500NHF | 1367100 | |
| Feb 16, 2026 | Copper, Total | DNQ .0015 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367100 | |
| Feb 16, 2026 | Lead, Total | DNQ .00053 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367100 | |
| Feb 16, 2026 | Nitrate, Total (as N) | DNQ .1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1367100 | |
| Feb 16, 2026 | Nitrite Plus Nitrate (as N) | DNQ .1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1367100 | |
| Feb 16, 2026 | Nitrite, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1367100 | |
| Feb 16, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1367100 | |
| Feb 16, 2026 | pH | 6.95 | SU | Effluent | Qualifying Storm Event | pH_Field | 1367100 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 5.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1367100 | |
| Feb 16, 2026 | Zinc, Total | .051 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367100 | |
| Mar 13, 2025 | Ammonia, Total (as N) | .084 | mg/L | Effluent | Qualifying Storm Event | A4500NHF | 1332130 | |
| Mar 13, 2025 | Ammonia, Total (as N) | .15 | mg/L | Effluent | Qualifying Storm Event | A4500NHF | 1332130 | |
| Mar 13, 2025 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332130 | |
| Mar 13, 2025 | Copper, Total | .0086 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332130 | |
| Mar 13, 2025 | Nitrate, Total (as N) | DNQ .13 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1332130 | |
| Mar 13, 2025 | Nitrate, Total (as N) | DNQ .25 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1332130 | |
| Mar 13, 2025 | Nitrite Plus Nitrate (as N) | DNQ .15 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1332130 | |
| Mar 13, 2025 | Nitrite Plus Nitrate (as N) | DNQ .27 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1332130 | |
| Mar 13, 2025 | Nitrite, Total (as N) | DNQ .014 | mg/L | Effluent | Qualifying Storm Event | A4500NOB | 1332130 | |
| Mar 13, 2025 | Nitrite, Total (as N) | DNQ .0019 | mg/L | Effluent | Qualifying Storm Event | A4500NOB | 1332130 | |
| Mar 13, 2025 | Oil and Grease | .8 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1332130 | |
| Mar 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1332130 | |
| Mar 13, 2025 | pH | 7.52 | SU | Effluent | Qualifying Storm Event | pH_Field | 1332130 | |
| Mar 13, 2025 | pH | 7.67 | SU | Effluent | Qualifying Storm Event | pH_Field | 1332130 | |
| Mar 13, 2025 | Total Suspended Solids (TSS) | 10 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1332130 | |
| Mar 13, 2025 | Total Suspended Solids (TSS) | 9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1332130 | |
| Mar 13, 2025 | Zinc, Total | .063 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332130 | |
| Mar 13, 2025 | Zinc, Total | .15 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1332130 | |
| Mar 05, 2025 | Ammonia, Total (as N) | .32 | mg/L | Effluent | Qualifying Storm Event | A4500NHF | 1324944 | |
| Mar 05, 2025 | Ammonia, Total (as N) | .35 | mg/L | Effluent | Qualifying Storm Event | A4500NHF | 1324944 | |
| Mar 05, 2025 | Copper, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1324944 | |
| Mar 05, 2025 | Copper, Total | .12 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1324944 | |
| Mar 05, 2025 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1324944 | |
| Mar 05, 2025 | Lead, Total | DNQ .0024 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1324944 | |
| Mar 05, 2025 | Nitrate, Total (as N) | .32 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1324944 | |
| Mar 05, 2025 | Nitrate, Total (as N) | .61 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1324944 | |
| Mar 05, 2025 | Nitrite Plus Nitrate (as N) | .35 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1324944 | |
| Mar 05, 2025 | Nitrite Plus Nitrate (as N) | .65 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1324944 | |
| Mar 05, 2025 | Nitrite, Total (as N) | DNQ .037 | mg/L | Effluent | Qualifying Storm Event | A4500NOB | 1324944 | |
| Mar 05, 2025 | Nitrite, Total (as N) | DNQ .037 | mg/L | Effluent | Qualifying Storm Event | A4500NOB | 1324944 |
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 | 0 | 0 Violation · 0 Potential (preliminary) · 0 Dismissed | — | Oct 21, 2026 | |
| Enforcement actions | 0 | 0 issued · 0 draft · 0 withdrawn, rescinded or superseded | — | Oct 21, 2026 | |
| Inspections | 1 | inspections, not findings | Nov 04, 2025 – Nov 04, 2025 | 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 (12 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 08, 2026 | Annual reports | 1338917 | Annual report 2025 | — | |
| Nov 04, 2025 | Inspections | 2069411 | B Type compliance | Performed | No Further Action |
| Jul 08, 2025 | Annual reports | 1297941 | Annual report 2024 | — | |
| Jul 09, 2024 | Annual reports | 1247203 | Annual report 2023 | — | |
| Jun 30, 2023 | Annual reports | 1193396 | Annual report 2022 | — | |
| Jul 14, 2022 | Annual reports | 1117214 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1065421 | Annual report 2020 | — | |
| Jul 14, 2020 | Annual reports | 982511 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 958854 | Annual report 2018 | — | |
| Jul 12, 2018 | Annual reports | 944291 | Annual report 2017 | — | |
| Jul 09, 2017 | Annual reports | 883731 | Annual report 2016 | — | |
| Jun 23, 2016 | Annual reports | 840933 | 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.