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
SMARTS TMDL records Evidence: SMARTS-reported
0 records
TMDL records

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

Open this facility on the statewide map

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

Storm water applications for this WDID, newest first
ApplicationTypeStatusProcessedTerminatedCertified
189493 IndustrialActiveApr 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).

2026 Appendix A decisions for the identified receiving water
PollutantCategoryListing decisionTMDL requirementDecision ID
Aluminum5List on 303(d) list (TMDL required list) 5A153887
Benthic Community Effects5Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) 5B · Malibu Lagoon Benthic Comm. Effects (71)151140
Cyanide5List on 303(d) list (TMDL required list) 5A137519
Fish Barriers (Fish Passage)5List on 303(d) list (TMDL required list) 5A69985
Indicator Bacteria5Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) 5B · Malibu Pathogens (47 in part)150309
Invasive Species5List on 303(d) list (TMDL required list) 5A76592
Nitrogen, Nitrate5List on 303(d) list (TMDL required list) 5A149709
Nutrients (Algae)5List on 303(d) list (being addressed by USEPA approved TMDL) 5B · Malibu Creek Nutrients (50)76173
Oxygen, Dissolved5List on 303(d) list (TMDL required list) 5A151901
Scum/Foam-unnatural5List on 303(d) list (being addressed by USEPA approved TMDL) 5B · Malibu Creek Nutrients (50)72507
Sedimentation/Siltation5List on 303(d) list (being addressed by USEPA approved TMDL) 5B · Malibu Lagoon Benthic Comm. Effects (71)69986
Selenium5Do Not Delist from 303(d) list (TMDL required list) 5A137526
Sulfates5Do Not Delist from 303(d) list (TMDL required list) 5A137528
Toxicity5Do Not Delist from 303(d) list (TMDL required list) 5A137532
Trash5List 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.

Nearest 2026 Integrated Report waterbodies
Waterbody (2026 Integrated Report)Distance2026 303(d) listAppendix A decisions
Malibu Creek CAR404210001999020113282534 m listed15
Cold Creek (Los Angeles County) CAR4042100020020130153315387 m listed1

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

Distinct results by reporting year
Reporting year (July–June)Distinct resultsParametersWith several versionsFirst sampleLast sample
2025224 0 Nov 15, 2025Feb 17, 2026
2023164 0 Feb 01, 2024Feb 04, 2024
2022164 0 Jan 09, 2023Feb 24, 2023
202184 0 Dec 14, 2021Dec 14, 2021
2018164 0 Jan 15, 2019Feb 02, 2019
201733 0 Mar 21, 2018Mar 21, 2018
201684 0 Feb 17, 2017Feb 17, 2017
201574 0 Jan 05, 2016Jan 05, 2016

By parameter

Distinct results by parameter
ParameterUnitsMeasurementsBelow detectionFirst sampleLast sampleResults
Oil and Greasemg/L25 24Jan 05, 2016Feb 17, 2026 Results
pHSU25 0Jan 05, 2016Feb 17, 2026 Results
Total Suspended Solids (TSS)mg/L25 0Jan 05, 2016Feb 17, 2026 Results
Electrical Conductivity @ 25 Deg. Cumhos/cm21 0Jan 05, 2016Dec 24, 2025 Results

All results (96 distinct rows)

Reported monitoring results, newest first
Sample dateParameterResultUnitsLocation typeEventMethodReportVersions
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.

Compliance and enforcement records by type
Record typeRecordsAs publishedDatesRetrievedList
Violations2 2 Violation · 0 Potential (preliminary) · 0 Dismissed Jul 30, 2020 – May 03, 2022 Oct 21, 2026 All violations
Enforcement actions2 2 issued · 0 draft · 0 withdrawn, rescinded or superseded Jul 30, 2020 – May 03, 2022 Oct 21, 2026 All actions
Inspections1inspections, not findings Aug 20, 2002 – Aug 20, 2002 Oct 21, 2026 All inspections
Annual reports11certified reports (contents not shown) 2015 – 2025 Oct 21, 2026 All reports
Water-quality-based corrective action reports0reports, 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)
Compliance and enforcement records, newest first
DateRecordIDType or purposeStatus as publishedDetail
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 ViolationReport
Jul 30, 2020 Enforcement actions 437010 NOV (Notice of Violation) Historical
Jul 30, 2020 Violations 873442 Incomplete/Insufficient SWPPP ViolationReport
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

Sources behind this page
InformationSourceRetrieved or published
Permit, location, receiving-water textSMARTS Industrial Application Specific DataOct 20, 2026
Permit historySMARTS Storm Water ApplicationsOct 20, 2026
Monitoring resultsSMARTS Industrial Parameter DataOct 20, 2026
Watershed Boundary Dataset HU2 GeoPackages 15, 16, 18 (WBDHU12)USGS2026-10-22
2026 California Integrated Report, Appendix A: 2026 303(d) List (final)SWRCB2026-10-22
Final_2026_Rivers_and_Streams + Final_2026_Lakes_and_Reservoirs (FeatureServer 0)SWRCB GIS2026-10-22
SMARTS TMDL requirementsSMARTS2026-10-21

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

Records are shown as published and are not compliance determinations. How geographic context is derived.