Calpipe Industries LLC a part of Atkore

Active WDID 4 56I029317 Santa Paula, Ventura 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
Santa Paula, Ventura County
Region 4 · Los Angeles · Location · Statewide map
Receiving water
Santa Clara River Reach 3 (Freeman Diversion to A Street) (as reported by the facility)
Evidence: identification corroborated Santa Clara River Reach 3 (Freeman Diversion to A Street) Details
Identified receiving water on the 2026 303(d) list
Yes · 10 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
1 waterbody; 1 on the 2026 303(d) list
Proximity only; not a discharge pathway · Nearby waterbodies
Monitoring results Evidence: facility-reported
242 distinct results, 5 reporting years (2021 to 2025)
Most recent sample Feb 19, 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
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
34.33255, -119.08447
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
923 Calpipe Road, Santa Paula 93060
Regional Water Board
4 — Los Angeles

HUC12 watershed Evidence: spatial

  • Adams Canyon-Santa Clara River HUC12 180701020903

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
Calpipe Industries LLC a part of Atkore
Primary industry (SIC)
3479-Coating, Engraving, and Allied Services, NEC
Application ID
538288
NOI processed
Jul 22, 2021
Last certified
Sep 30, 2022
Facility size
4.3 Acres
Impervious area
90 %

Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.

Permit history

Storm water applications for this WDID, newest first
ApplicationTypeStatusProcessedTerminatedCertified
538288 IndustrialActiveJul 22, 2021 —Sep 30, 2022

Every storm water application SMARTS records for this WDID, newest first (1).

Receiving water

Reported by the facility Evidence: facility-reported
Santa Clara River Reach 3 (Freeman Diversion to A Street)
Discharges directly / indirectly
Y / N (as answered in the permit application)

Evidence: identification corroborated Santa Clara River Reach 3 (Freeman Diversion to A Street) CAR4032100019990203101738

Receiving water reported by facility — waterbody identification corroborated by geographic evidence.

Nearest distance from the reported facility location: 525 m. Method receiving_water/2.

2026 Integrated Report status Evidence: State-published

Santa Clara River Reach 3 (Freeman Diversion to A Street) is on the 2026 Clean Water Act section 303(d) list (10 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) 5A153876
Chloride5Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) 5B · Santa Clara River Chloride (31)136750
Indicator Bacteria5Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) 5B · Santa Clara River Coliform (23b & 34)150680
Selenium5Do Not Delist from 303(d) list (TMDL required list) 5A136791
Sodium Adsorption Ratio (SAR)5List on 303(d) list (TMDL required list) 5A136815
Sulfates5List on 303(d) list (TMDL required list) 5A136794
Total Dissolved Solids5Do Not Delist from 303(d) list (TMDL required list) 5A136799
Toxicity5Do Not Delist from 303(d) list (TMDL required list) 5A136801
Trash5List on 303(d) list (being addressed by action other than TMDL) 5C100293
Turbidity5List on 303(d) list (TMDL required list) 5A136802

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
Santa Clara River Reach 3 (Freeman Diversion to A Street) CAR4032100019990203101738525 m listed10

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.

242 distinct measurements across 6 parameters, most recent sample Feb 19, 2026.

By reporting year

Distinct results by reporting year
Reporting year (July–June)Distinct resultsParametersWith several versionsFirst sampleLast sample
2025486 0 Oct 14, 2025Feb 19, 2026
2024366 0 Feb 05, 2025Feb 13, 2025
2023546 0 Dec 21, 2023Feb 19, 2024
2022846 0 Nov 08, 2022Mar 14, 2023
2021205 0 Oct 25, 2021Mar 28, 2022

By parameter

Distinct results by parameter
ParameterUnitsMeasurementsBelow detectionFirst sampleLast sampleResults
Nitrite Plus Nitrate (as N)mg/L41 4Oct 25, 2021Feb 19, 2026 Results
Oil and Greasemg/L41 34Oct 25, 2021Feb 19, 2026 Results
pHSU41 0Oct 25, 2021Feb 19, 2026 Results
Total Suspended Solids (TSS)mg/L41 1Oct 25, 2021Feb 19, 2026 Results
Zinc, Totalmg/L41 0Oct 25, 2021Feb 19, 2026 Results
Aluminum, Totalmg/L37 1Nov 08, 2022Feb 19, 2026 Results

All results (242 distinct rows)

Reported monitoring results, newest first
Sample dateParameterResultUnitsLocation typeEventMethodReportVersions
Feb 19, 2026 Aluminum, Total .206 mg/L Effluent Qualifying Storm Event E200.8 1370538
Feb 19, 2026 Nitrite Plus Nitrate (as N) .16 mg/L Effluent Qualifying Storm Event A4500F 1370538
Feb 19, 2026 Oil and Grease 10.2 mg/L Effluent Qualifying Storm Event E1664A 1370538
Feb 19, 2026 pH 7.5 SU Effluent Qualifying Storm Event pH_Field 1370538
Feb 19, 2026 Total Suspended Solids (TSS) 29.3 mg/L Effluent Qualifying Storm Event A2540D 1370538
Feb 19, 2026 Zinc, Total .162 mg/L Effluent Qualifying Storm Event E200.8 1370538
Feb 16, 2026 Aluminum, Total .277 mg/L Effluent Qualifying Storm Event E200.8 1370537
Feb 16, 2026 Nitrite Plus Nitrate (as N) 8.63 mg/L Effluent Qualifying Storm Event A4500F 1370537
Feb 16, 2026 Oil and Grease 22.9 mg/L Effluent Qualifying Storm Event E1664A 1370537
Feb 16, 2026 pH 7 SU Effluent Qualifying Storm Event pH_Field 1370537
Feb 16, 2026 Total Suspended Solids (TSS) 72.5 mg/L Effluent Qualifying Storm Event A2540D 1370537
Feb 16, 2026 Zinc, Total .106 mg/L Effluent Qualifying Storm Event E200.8 1370537
Nov 17, 2025 Aluminum, Total .338 mg/L Effluent Qualifying Storm Event E200.8 1370534
Nov 17, 2025 Aluminum, Total .1 mg/L Effluent Qualifying Storm Event E200.8 1370534
Nov 17, 2025 Aluminum, Total .29 mg/L Effluent Qualifying Storm Event E200.8 1370534
Nov 17, 2025 Nitrite Plus Nitrate (as N) 11 mg/L Effluent Qualifying Storm Event A4500F 1370534
Nov 17, 2025 Nitrite Plus Nitrate (as N) 8.8 mg/L Effluent Qualifying Storm Event A4500F 1370534
Nov 17, 2025 Nitrite Plus Nitrate (as N) 11.7 mg/L Effluent Qualifying Storm Event A4500F 1370534
Nov 17, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1370534
Nov 17, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1370534
Nov 17, 2025 Oil and Grease 5.87 mg/L Effluent Qualifying Storm Event E1664A 1370534
Nov 17, 2025 pH 7 SU Effluent Qualifying Storm Event pH_Field 1370534
Nov 17, 2025 pH 8 SU Effluent Qualifying Storm Event pH_Field 1370534
Nov 17, 2025 pH 7 SU Effluent Qualifying Storm Event pH_Field 1370534
Nov 17, 2025 Total Suspended Solids (TSS) 73.4 mg/L Effluent Qualifying Storm Event A2540D 1370534
Nov 17, 2025 Total Suspended Solids (TSS) 14.7 mg/L Effluent Qualifying Storm Event A2540D 1370534
Nov 17, 2025 Total Suspended Solids (TSS) 92.4 mg/L Effluent Qualifying Storm Event A2540D 1370534
Nov 17, 2025 Zinc, Total .129 mg/L Effluent Qualifying Storm Event E200.8 1370534
Nov 17, 2025 Zinc, Total .0852 mg/L Effluent Qualifying Storm Event E200.8 1370534
Nov 17, 2025 Zinc, Total .238 mg/L Effluent Qualifying Storm Event E200.8 1370534
Oct 14, 2025 Aluminum, Total .0835 mg/L Effluent Qualifying Storm Event E200.8 1359496
Oct 14, 2025 Aluminum, Total .199 mg/L Effluent Qualifying Storm Event E200.8 1359496
Oct 14, 2025 Aluminum, Total .131 mg/L Effluent Qualifying Storm Event E200.8 1359496
Oct 14, 2025 Nitrite Plus Nitrate (as N) 10.8 mg/L Effluent Qualifying Storm Event A4500F 1359496
Oct 14, 2025 Nitrite Plus Nitrate (as N) 11.2 mg/L Effluent Qualifying Storm Event A4500F 1359496
Oct 14, 2025 Nitrite Plus Nitrate (as N) 13.1 mg/L Effluent Qualifying Storm Event A4500F 1359496
Oct 14, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1359496
Oct 14, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1359496
Oct 14, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1359496
Oct 14, 2025 pH 7 SU Effluent Qualifying Storm Event pH_Field 1359496
Oct 14, 2025 pH 7 SU Effluent Qualifying Storm Event pH_Field 1359496
Oct 14, 2025 pH 7 SU Effluent Qualifying Storm Event pH_Field 1359496
Oct 14, 2025 Total Suspended Solids (TSS) 9.7 mg/L Effluent Qualifying Storm Event A2540D 1359496
Oct 14, 2025 Total Suspended Solids (TSS) 28.1 mg/L Effluent Qualifying Storm Event A2540D 1359496
Oct 14, 2025 Total Suspended Solids (TSS) 31.5 mg/L Effluent Qualifying Storm Event A2540D 1359496
Oct 14, 2025 Zinc, Total .102 mg/L Effluent Qualifying Storm Event E200.8 1359496
Oct 14, 2025 Zinc, Total .173 mg/L Effluent Qualifying Storm Event E200.8 1359496
Oct 14, 2025 Zinc, Total .169 mg/L Effluent Qualifying Storm Event E200.8 1359496
Feb 13, 2025 Aluminum, Total .0931 mg/L Effluent Qualifying Storm Event E200.8 1325819
Feb 13, 2025 Aluminum, Total .0934 mg/L Effluent Qualifying Storm Event E200.8 1325819

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
Violations0 0 Violation · 0 Potential (preliminary) · 0 Dismissed — Oct 21, 2026
Enforcement actions0 0 issued · 0 draft · 0 withdrawn, rescinded or superseded — Oct 21, 2026
Inspections1inspections, not findings Feb 04, 2025 – Feb 04, 2025 Oct 21, 2026 All inspections
Annual reports5certified reports (contents not shown) 2021 – 2025 Oct 21, 2026 All reports
Water-quality-based corrective action reports1reports, by parameter 2023-24 – 2023-24 Oct 21, 2026 All reports

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 (7 records, newest first)
Compliance and enforcement records, newest first
DateRecordIDType or purposeStatus as publishedDetail
Jun 30, 2026 Annual reports 1340906 Annual report 2025 —
Jul 07, 2025 Annual reports 1300079 Annual report 2024 —
Feb 04, 2025 Inspections 2067029 B Type compliance PerformedNo Further Action
Jul 15, 2024 Annual reports 1249473 Annual report 2023 —
Jun 08, 2023 Annual reports 1195795 Annual report 2022 —
Jun 24, 2022 Annual reports 1154767 Annual report 2021 —
— Water-quality-based corrective action reports 1275767 WQBCAR 2023-24 —Nitrite Plus Nitrate (as N), Zinc, Total

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.