Tapia WRF
Active WDID 4 19I005211 Calabasas, 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
- Calabasas, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Malibu Creek (as reported by the facility)
- Evidence: identification corroborated Malibu Creek Details
- Identified receiving water on the 2026 303(d) list
- Yes · 15 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; 2 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 96 distinct results, 8 reporting years (2015 to 2025)
- Most recent sample Feb 17, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 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
- 34.081499, -118.704268
- Precision
- 6 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
- 731 Malibu Canyon, Calabasas 91302
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Cold Creek-Malibu Creek HUC12 180701040104
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
- Las Virgenes Municipal Water District
- Primary industry (SIC)
- 4952-Sewerage Systems
- Application ID
- 189493
- NOI processed
- Apr 09, 1992
- Last certified
- Dec 19, 2022
- Facility size
- 80 Acres
- Impervious area
- 8.75 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 189493 | Industrial | Active | Apr 09, 1992 | — | Dec 19, 2022 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Malibu Creek
- Discharges directly / indirectly
- Y / N (as answered in the permit application)
Evidence: identification corroborated Malibu Creek CAR4042100019990201132825
Receiving water reported by facility — waterbody identification corroborated by geographic evidence.
Nearest distance from the reported facility location: 34 m. Method receiving_water/2.
2026 Integrated Report status Evidence: State-published
Malibu Creek is on the 2026 Clean Water Act section 303(d) list (15 Appendix A decisions; category 5).
| Pollutant | Category | Listing decision | TMDL requirement | Decision ID |
|---|---|---|---|---|
| Aluminum | 5 | List on 303(d) list (TMDL required list) | 5A | 153887 |
| Benthic Community Effects | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | 5B · Malibu Lagoon Benthic Comm. Effects (71) | 151140 |
| Cyanide | 5 | List on 303(d) list (TMDL required list) | 5A | 137519 |
| Fish Barriers (Fish Passage) | 5 | List on 303(d) list (TMDL required list) | 5A | 69985 |
| Indicator Bacteria | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | 5B · Malibu Pathogens (47 in part) | 150309 |
| Invasive Species | 5 | List on 303(d) list (TMDL required list) | 5A | 76592 |
| Nitrogen, Nitrate | 5 | List on 303(d) list (TMDL required list) | 5A | 149709 |
| Nutrients (Algae) | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | 5B · Malibu Creek Nutrients (50) | 76173 |
| Oxygen, Dissolved | 5 | List on 303(d) list (TMDL required list) | 5A | 151901 |
| Scum/Foam-unnatural | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | 5B · Malibu Creek Nutrients (50) | 72507 |
| Sedimentation/Siltation | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | 5B · Malibu Lagoon Benthic Comm. Effects (71) | 69986 |
| Selenium | 5 | Do Not Delist from 303(d) list (TMDL required list) | 5A | 137526 |
| Sulfates | 5 | Do Not Delist from 303(d) list (TMDL required list) | 5A | 137528 |
| Toxicity | 5 | Do Not Delist from 303(d) list (TMDL required list) | 5A | 137532 |
| Trash | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | 5B · Malibu Creek Watershed Trash (63) | 78692 |
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 |
|---|---|---|---|
| Malibu Creek CAR4042100019990201132825 | 34 m | listed | 15 |
| Cold Creek (Los Angeles County) CAR4042100020020130153315 | 387 m | listed | 1 |
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.
96 distinct measurements across 4 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 | 22 | 4 | 0 | Nov 15, 2025 | Feb 17, 2026 |
| 2023 | 16 | 4 | 0 | Feb 01, 2024 | Feb 04, 2024 |
| 2022 | 16 | 4 | 0 | Jan 09, 2023 | Feb 24, 2023 |
| 2021 | 8 | 4 | 0 | Dec 14, 2021 | Dec 14, 2021 |
| 2018 | 16 | 4 | 0 | Jan 15, 2019 | Feb 02, 2019 |
| 2017 | 3 | 3 | 0 | Mar 21, 2018 | Mar 21, 2018 |
| 2016 | 8 | 4 | 0 | Feb 17, 2017 | Feb 17, 2017 |
| 2015 | 7 | 4 | 0 | Jan 05, 2016 | Jan 05, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 25 | 24 | Jan 05, 2016 | Feb 17, 2026 | Results |
| pH | SU | 25 | 0 | Jan 05, 2016 | Feb 17, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 25 | 0 | Jan 05, 2016 | Feb 17, 2026 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 21 | 0 | Jan 05, 2016 | Dec 24, 2025 | Results |
All results (96 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 17, 2026 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1376660 | |
| Feb 17, 2026 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1376660 | |
| Feb 17, 2026 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | A4500HB | 1376660 | |
| Feb 17, 2026 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | A4500HB | 1376660 | |
| Feb 17, 2026 | Total Suspended Solids (TSS) | 90 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1376660 | |
| Feb 17, 2026 | Total Suspended Solids (TSS) | 44.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1376660 | |
| Dec 24, 2025 | Electrical Conductivity @ 25 Deg. C | 9.25 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1365789 | |
| Dec 24, 2025 | Electrical Conductivity @ 25 Deg. C | 15.06 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1365789 | |
| Dec 24, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1365789 | |
| Dec 24, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1365789 | |
| Dec 24, 2025 | pH | 7.76 | SU | Effluent | Qualifying Storm Event | A4500HB | 1365789 | |
| Dec 24, 2025 | pH | 7.07 | SU | Effluent | Qualifying Storm Event | A4500HB | 1365789 | |
| Dec 24, 2025 | Total Suspended Solids (TSS) | 6.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365789 | |
| Dec 24, 2025 | Total Suspended Solids (TSS) | 18 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365789 | |
| Nov 15, 2025 | Electrical Conductivity @ 25 Deg. C | 14.65 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1365789 | |
| Nov 15, 2025 | Electrical Conductivity @ 25 Deg. C | 8.97 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1365789 | |
| Nov 15, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1365789 | |
| Nov 15, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1365789 | |
| Nov 15, 2025 | pH | 7.47 | SU | Effluent | Qualifying Storm Event | A4500HB | 1365789 | |
| Nov 15, 2025 | pH | 6.93 | SU | Effluent | Qualifying Storm Event | A4500HB | 1365789 | |
| Nov 15, 2025 | Total Suspended Solids (TSS) | 24 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365789 | |
| Nov 15, 2025 | Total Suspended Solids (TSS) | 41 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365789 | |
| Feb 04, 2024 | Electrical Conductivity @ 25 Deg. C | 8.5 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1288277 | |
| Feb 04, 2024 | Electrical Conductivity @ 25 Deg. C | 15.3 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1288277 | |
| Feb 04, 2024 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1288277 | |
| Feb 04, 2024 | Oil and Grease | 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1288277 | |
| Feb 04, 2024 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | A4500HB | 1288277 | |
| Feb 04, 2024 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | A4500HB | 1288277 | |
| Feb 04, 2024 | Total Suspended Solids (TSS) | 10 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1288277 | |
| Feb 04, 2024 | Total Suspended Solids (TSS) | 51.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1288277 | |
| Feb 01, 2024 | Electrical Conductivity @ 25 Deg. C | 9.9 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1288277 | |
| Feb 01, 2024 | Electrical Conductivity @ 25 Deg. C | 22.9 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1288277 | |
| Feb 01, 2024 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1288277 | |
| Feb 01, 2024 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1288277 | |
| Feb 01, 2024 | pH | 8.3 | SU | Effluent | Qualifying Storm Event | A4500HB | 1288277 | |
| Feb 01, 2024 | pH | 7.7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1288277 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 147 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1288277 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 7.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1288277 | |
| Feb 24, 2023 | Electrical Conductivity @ 25 Deg. C | 82.24 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1229099 | |
| Feb 24, 2023 | Electrical Conductivity @ 25 Deg. C | 75.06 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1229099 | |
| Feb 24, 2023 | Oil and Grease | < 4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1229099 | |
| Feb 24, 2023 | Oil and Grease | < 4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1229099 | |
| Feb 24, 2023 | pH | 7.34 | SU | Effluent | Qualifying Storm Event | A4500HB | 1229099 | |
| Feb 24, 2023 | pH | 6.67 | SU | Effluent | Qualifying Storm Event | A4500HB | 1229099 | |
| Feb 24, 2023 | Total Suspended Solids (TSS) | 11.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1229099 | |
| Feb 24, 2023 | Total Suspended Solids (TSS) | 16 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1229099 | |
| Jan 09, 2023 | Electrical Conductivity @ 25 Deg. C | 65.83 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1239023 | |
| Jan 09, 2023 | Electrical Conductivity @ 25 Deg. C | 23.61 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1239023 | |
| Jan 09, 2023 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1239023 | |
| Jan 09, 2023 | Oil and Grease | < 4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1239023 |
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 30, 2020 – May 03, 2022 | Oct 21, 2026 | All violations |
| Enforcement actions | 2 | 2 issued · 0 draft · 0 withdrawn, rescinded or superseded | Jul 30, 2020 – May 03, 2022 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Aug 20, 2002 – Aug 20, 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 (16 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 08, 2026 | Annual reports | 1333978 | Annual report 2025 | — | |
| Jul 09, 2025 | Annual reports | 1292742 | Annual report 2024 | — | |
| Jul 10, 2024 | Annual reports | 1241734 | Annual report 2023 | — | |
| Jul 05, 2023 | Annual reports | 1187654 | Annual report 2022 | — | |
| Jul 13, 2022 | Annual reports | 1110899 | Annual report 2021 | — | |
| May 18, 2022 | Annual reports | 1066823 | Annual report 2020 | — | |
| May 03, 2022 | Enforcement actions | 446466 | NOV (Notice of Violation) | Historical | |
| May 03, 2022 | Violations | 881676 | Late Report | Violation | Report |
| Jul 30, 2020 | Enforcement actions | 437010 | NOV (Notice of Violation) | Historical | |
| Jul 30, 2020 | Violations | 873442 | Incomplete/Insufficient SWPPP | Violation | Report |
| Jul 06, 2020 | Annual reports | 983965 | Annual report 2019 | — | |
| Jul 10, 2019 | Annual reports | 951458 | Annual report 2018 | — | |
| Aug 07, 2018 | Annual reports | 936864 | Annual report 2017 | — | |
| Aug 16, 2017 | Annual reports | 876001 | Annual report 2016 | — | |
| Jul 14, 2016 | Annual reports | 848036 | Annual report 2015 | — | |
| Aug 20, 2002 | Inspections | 1735354 | B Type compliance | — |
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.