Amazon com Services LLC DAX3

Active WDID 4 19I028900 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
Los Angeles River, Reach 6 (as reported by the facility)
Evidence: candidate, awaiting review Details
Identified receiving water on the 2026 303(d) list
Not established
Shown only when the reported receiving water is identified and corroborated.
2026 Integrated Report waters within 1.0 km Evidence: geographic proximity
None
Monitoring results Evidence: facility-reported
48 distinct results, 6 reporting years (2020 to 2025)
Most recent sample Oct 14, 2025 · Monitoring
Compliance and enforcement records Evidence: SMARTS record
0 inspections · 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
34.23995, -118.58527
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
20730 Prairie Street remove PO Box, Chatsworth 98108
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
Amazon com Services LLC
Primary industry (SIC)
4225-General Warehousing and Storage
Application ID
526637
NOI processed
Oct 05, 2020
Last certified
Aug 28, 2021
Facility size
13.28 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
526637 IndustrialActiveOct 05, 2020 —Aug 28, 2021

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

Receiving water

Reported by the facility Evidence: facility-reported
Los Angeles River, Reach 6
Discharges directly / indirectly
Y / N (as answered in the permit application)

Evidence: not confirmed Evidence: candidate, awaiting review Awaiting review

Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.

Why it is not confirmed (1)
  • C1 name is only a prefix of official names

1 official waterbody shares this name; none is assigned without review.

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

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.

48 distinct measurements across 3 parameters, most recent sample Oct 14, 2025.

By reporting year

Distinct results by reporting year
Reporting year (July–June)Distinct resultsParametersWith several versionsFirst sampleLast sample
202533 0 Oct 14, 2025Oct 14, 2025
202463 0 Mar 05, 2025Mar 11, 2025
2023123 0 Feb 01, 2024Feb 19, 2024
2022183 0 Jan 04, 2023Feb 24, 2023
202163 0 Nov 25, 2021Nov 25, 2021
202033 0 Jan 23, 2021Jan 23, 2021

By parameter

Distinct results by parameter
ParameterUnitsMeasurementsBelow detectionFirst sampleLast sampleResults
Oil and Greasemg/L16 16Jan 23, 2021Oct 14, 2025 Results
pHSU16 0Jan 23, 2021Oct 14, 2025 Results
Total Suspended Solids (TSS)mg/L16 4Jan 23, 2021Oct 14, 2025 Results

All results (48 distinct rows)

Reported monitoring results, newest first
Sample dateParameterResultUnitsLocation typeEventMethodReportVersions
Oct 14, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664B 1354941
Oct 14, 2025 pH 6.59 SU Effluent Qualifying Storm Event pH_Field 1354941
Oct 14, 2025 Total Suspended Solids (TSS) DNQ 1.6 mg/L Effluent Qualifying Storm Event A2540D 1354941
Mar 11, 2025 Oil and Grease DNQ 7.2 mg/L Effluent Qualifying Storm Event E1664B 1329114
Mar 11, 2025 pH 8.8 SU Effluent Qualifying Storm Event pH_Field 1329114
Mar 11, 2025 Total Suspended Solids (TSS) 62 mg/L Effluent Qualifying Storm Event A2540D 1329114
Mar 05, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664B 1326484
Mar 05, 2025 pH 8.78 SU Effluent Qualifying Storm Event pH_Field 1326484
Mar 05, 2025 Total Suspended Solids (TSS) 9.2 mg/L Effluent Qualifying Storm Event A2540D 1326484
Feb 19, 2024 Oil and Grease DNQ 3.3 mg/L Effluent Qualifying Storm Event E1664B 1278895
Feb 19, 2024 Oil and Grease DNQ 3.8 mg/L Effluent Qualifying Storm Event E1664B 1278895
Feb 19, 2024 pH 8.33 SU Effluent Qualifying Storm Event pH_Field 1278895
Feb 19, 2024 pH 8.84 SU Effluent Qualifying Storm Event pH_Field 1278895
Feb 19, 2024 Total Suspended Solids (TSS) 13 mg/L Effluent Qualifying Storm Event A2540D 1278895
Feb 19, 2024 Total Suspended Solids (TSS) 12 mg/L Effluent Qualifying Storm Event A2540D 1278895
Feb 01, 2024 Oil and Grease DNQ 5.6 mg/L Effluent Qualifying Storm Event E1664B 1278218
Feb 01, 2024 Oil and Grease DNQ 4.6 mg/L Effluent Qualifying Storm Event E1664B 1278218
Feb 01, 2024 pH 10.04 SU Effluent Qualifying Storm Event pH_Field 1278218
Feb 01, 2024 pH 9.2 SU Effluent Qualifying Storm Event pH_Field 1278218
Feb 01, 2024 Total Suspended Solids (TSS) 6.8 mg/L Effluent Qualifying Storm Event A2540D 1278218
Feb 01, 2024 Total Suspended Solids (TSS) 9.5 mg/L Effluent Qualifying Storm Event A2540D 1278218
Feb 24, 2023 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1232791
Feb 24, 2023 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1232791
Feb 24, 2023 pH 8.6 SU Effluent Qualifying Storm Event pH_Field 1232791
Feb 24, 2023 pH 8.9 SU Effluent Qualifying Storm Event pH_Field 1232791
Feb 24, 2023 Total Suspended Solids (TSS) 4.9 mg/L Effluent Qualifying Storm Event A2540D 1232791
Feb 24, 2023 Total Suspended Solids (TSS) 5.6 mg/L Effluent Qualifying Storm Event A2540D 1232791
Jan 14, 2023 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1226942
Jan 14, 2023 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1226942
Jan 14, 2023 pH 7.51 SU Effluent Qualifying Storm Event pH_Field 1226942
Jan 14, 2023 pH 8.17 SU Effluent Qualifying Storm Event pH_Field 1226942
Jan 14, 2023 Total Suspended Solids (TSS) 8.7 mg/L Effluent Qualifying Storm Event A2540D 1226942
Jan 14, 2023 Total Suspended Solids (TSS) ND mg/L Effluent Qualifying Storm Event A2540D 1226942
Jan 04, 2023 Oil and Grease DNQ 4.2 mg/L Effluent Qualifying Storm Event E1664A 1223845
Jan 04, 2023 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1223845
Jan 04, 2023 pH 7.67 SU Effluent Qualifying Storm Event pH_Field 1223845
Jan 04, 2023 pH 7.51 SU Effluent Qualifying Storm Event pH_Field 1223845
Jan 04, 2023 Total Suspended Solids (TSS) 37 mg/L Effluent Qualifying Storm Event A2540D 1223845
Jan 04, 2023 Total Suspended Solids (TSS) 29 mg/L Effluent Qualifying Storm Event A2540D 1223845
Nov 25, 2021 Oil and Grease DNQ 1.7 mg/L Effluent Qualifying Storm Event E1664A 1169801
Nov 25, 2021 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1169801
Nov 25, 2021 pH 7.97 SU Effluent Qualifying Storm Event pH_Field 1169801
Nov 25, 2021 pH 8.76 SU Effluent Qualifying Storm Event pH_Field 1169801
Nov 25, 2021 Total Suspended Solids (TSS) DNQ 3 mg/L Effluent Qualifying Storm Event A2540D 1169801
Nov 25, 2021 Total Suspended Solids (TSS) DNQ 2 mg/L Effluent Qualifying Storm Event A2540D 1169801
Jan 23, 2021 Oil and Grease DNQ 3 mg/L Effluent Qualifying Storm Event E1664A 1142665
Jan 23, 2021 pH 7.94 SU Effluent Qualifying Storm Event pH_Field 1142665
Jan 23, 2021 Total Suspended Solids (TSS) 21 mg/L Effluent Qualifying Storm Event A2540D 1142665

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
Inspections0inspections, not findings — Oct 21, 2026
Annual reports6certified reports (contents not shown) 2020 – 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 (6 records, newest first)
Compliance and enforcement records, newest first
DateRecordIDType or purposeStatus as publishedDetail
Jul 15, 2026 Annual reports 1339966 Annual report 2025 —
Jul 11, 2025 Annual reports 1299062 Annual report 2024 —
Jul 13, 2024 Annual reports 1248377 Annual report 2023 —
Jul 14, 2023 Annual reports 1194631 Annual report 2022 —
Jul 13, 2022 Annual reports 1156928 Annual report 2021 —
Jul 09, 2021 Annual reports 1135335 Annual report 2020 —

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.