Hawthorne Municipal Airport
Active WDID 4 19I002294 Hawthorne, 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
- Hawthorne, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Dominguez Flood Channel (as reported by the facility)
- Evidence: not confirmed 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
- 1 waterbody; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 134 distinct results, 8 reporting years (2015 to 2024)
- Most recent sample Feb 13, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 2 inspections · 8 violation records · 3 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
- 33.9226, -118.32651
- Precision
- 4 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
- 12101 Crenshaw Blvd, Hawthorne 90250
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Upper Dominguez Channel HUC12 180701060101
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
- Hawthorne City
- Primary industry (SIC)
- 4581-Airports, Flying Fields, and Airport Terminal Services
- Application ID
- 188930
- NOI processed
- Mar 31, 1992
- Last certified
- Oct 21, 2016
- Facility size
- 80 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 188930 | Industrial | Active | Mar 31, 1992 | — | Oct 21, 2016 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Dominguez Flood Channel
- Discharges directly / indirectly
- N / N (as answered in the permit application)
Evidence: not confirmed Not matchable to a single waterbody
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
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 |
|---|---|---|---|
| Dominguez Channel (lined portion above Vermont Ave) CAR4051200019980918161017 | 69 m | listed | 6 |
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.
134 distinct measurements across 7 parameters, most recent sample Feb 13, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2024 | 12 | 4 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2022 | 12 | 4 | 0 | Mar 21, 2023 | Mar 21, 2023 |
| 2021 | 12 | 4 | 0 | Mar 28, 2022 | Mar 28, 2022 |
| 2019 | 12 | 4 | 0 | Dec 04, 2019 | Dec 04, 2019 |
| 2018 | 24 | 4 | 0 | Dec 06, 2018 | Jan 14, 2019 |
| 2017 | 9 | 3 | 0 | Jan 09, 2018 | Jan 09, 2018 |
| 2016 | 39 | 7 | 0 | Dec 22, 2016 | Feb 06, 2017 |
| 2015 | 14 | 7 | 0 | Jan 05, 2016 | Jan 05, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Ammonia, Total (as N) | mg/L | 29 | 11 | Jan 05, 2016 | Feb 13, 2025 | Results |
| Oil and Grease | mg/L | 29 | 29 | Jan 05, 2016 | Feb 13, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 29 | 4 | Jan 05, 2016 | Feb 13, 2025 | Results |
| pH | SU | 26 | 0 | Jan 05, 2016 | Feb 13, 2025 | Results |
| Copper, Total | mg/L | 7 | 1 | Jan 05, 2016 | Feb 06, 2017 | Results |
| Lead, Total | mg/L | 7 | 1 | Jan 05, 2016 | Feb 06, 2017 | Results |
| Zinc, Total | mg/L | 7 | 0 | Jan 05, 2016 | Feb 06, 2017 | Results |
All results (134 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 13, 2025 | Ammonia, Total (as N) | .074 | mg/L | Effluent | Qualifying Storm Event | E350.1 | 1324300 | |
| Feb 13, 2025 | Ammonia, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E350.1 | 1324300 | |
| Feb 13, 2025 | Ammonia, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E350.1 | 1324300 | |
| Feb 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1324300 | |
| Feb 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1324300 | |
| Feb 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1324300 | |
| Feb 13, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1324300 | |
| Feb 13, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1324300 | |
| Feb 13, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1324300 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 13 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324300 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 9.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324300 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324300 | |
| Mar 21, 2023 | Ammonia, Total (as N) | .15 | mg/L | Effluent | Qualifying Storm Event | E350.1 | 1234774 | |
| Mar 21, 2023 | Ammonia, Total (as N) | .069 | mg/L | Effluent | Qualifying Storm Event | E350.1 | 1234774 | |
| Mar 21, 2023 | Ammonia, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E350.1 | 1234774 | |
| Mar 21, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1234774 | |
| Mar 21, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1234774 | |
| Mar 21, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1234774 | |
| Mar 21, 2023 | pH | 8 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1234774 | |
| Mar 21, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1234774 | |
| Mar 21, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1234774 | |
| Mar 21, 2023 | Total Suspended Solids (TSS) | 6.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1234774 | |
| Mar 21, 2023 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1234774 | |
| Mar 21, 2023 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1234774 | |
| Mar 28, 2022 | Ammonia, Total (as N) | .14 | mg/L | Effluent | Qualifying Storm Event | E350.1 | 1180203 | |
| Mar 28, 2022 | Ammonia, Total (as N) | .071 | mg/L | Effluent | Qualifying Storm Event | E350.1 | 1180203 | |
| Mar 28, 2022 | Ammonia, Total (as N) | .11 | mg/L | Effluent | Qualifying Storm Event | E350.1 | 1180203 | |
| Mar 28, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1180203 | |
| Mar 28, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1180203 | |
| Mar 28, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1180203 | |
| Mar 28, 2022 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1180203 | |
| Mar 28, 2022 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1180203 | |
| Mar 28, 2022 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1180203 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | 52 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1180203 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | 17 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1180203 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | 7.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1180203 | |
| Dec 04, 2019 | Ammonia, Total (as N) | .2 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1097298 | |
| Dec 04, 2019 | Ammonia, Total (as N) | .13 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1097298 | |
| Dec 04, 2019 | Ammonia, Total (as N) | < .1 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1097298 | |
| Dec 04, 2019 | Oil and Grease | < 1.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1097298 | |
| Dec 04, 2019 | Oil and Grease | < 1.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1097298 | |
| Dec 04, 2019 | Oil and Grease | < 1.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1097298 | |
| Dec 04, 2019 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1097298 | |
| Dec 04, 2019 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1097298 | |
| Dec 04, 2019 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1097298 | |
| Dec 04, 2019 | Total Suspended Solids (TSS) | 8.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1097298 | |
| Dec 04, 2019 | Total Suspended Solids (TSS) | 5.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1097298 | |
| Dec 04, 2019 | Total Suspended Solids (TSS) | 5.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1097298 | |
| Jan 14, 2019 | Ammonia, Total (as N) | .28 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1036852 | |
| Jan 14, 2019 | Ammonia, Total (as N) | .26 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1036852 |
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 | 8 | 3 Violation · 0 Potential (preliminary) · 5 Dismissed | Jul 02, 1998 – Oct 10, 2016 | Oct 21, 2026 | All violations |
| Enforcement actions | 3 | 3 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 17, 1998 – Oct 10, 2016 | Oct 21, 2026 | All actions |
| Inspections | 2 | inspections, not findings | Jun 28, 2007 – Apr 25, 2024 | 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 (24 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 25, 2026 | Annual reports | 1334193 | Annual report 2025 | — | |
| Jun 11, 2025 | Annual reports | 1292963 | Annual report 2024 | — | |
| Jun 24, 2024 | Annual reports | 1241966 | Annual report 2023 | — | |
| Apr 25, 2024 | Inspections | 2064172 | B Type compliance | Finalized | No Further Action |
| Jun 22, 2023 | Annual reports | 1187895 | Annual report 2022 | — | |
| Jun 21, 2022 | Annual reports | 1111161 | Annual report 2021 | — | |
| Jun 22, 2021 | Annual reports | 1067097 | Annual report 2020 | — | |
| Jun 15, 2020 | Annual reports | 984253 | Annual report 2019 | — | |
| Jun 24, 2019 | Annual reports | 951756 | Annual report 2018 | — | |
| Jun 27, 2018 | Annual reports | 937166 | Annual report 2017 | — | |
| Jun 26, 2017 | Annual reports | 876315 | Annual report 2016 | — | |
| Nov 03, 2016 | Annual reports | 842975 | Annual report 2015 | — | |
| Oct 10, 2016 | Enforcement actions | 424835 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Oct 10, 2016 | Violations | 861915 | Enforcement Action | Violation | Report |
| Jun 16, 2009 | Enforcement actions | 405836 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 02, 2008 | Violations | 844869 | Late Report | Violation | Report |
| Jun 28, 2007 | Inspections | 1554274 | B Type compliance | — | Additional Info Required |
| Jun 28, 2007 | Violations | 800434 | Incomplete/Insufficient SWPPP | Dismissed | Inspection |
| Jun 28, 2007 | Violations | 800435 | Deficient Report | Dismissed | Inspection |
| Jun 28, 2007 | Violations | 800436 | Unauthorized NSWD | Dismissed | Inspection |
| Jun 28, 2007 | Violations | 800437 | Unauthorized NSWD | Dismissed | Inspection |
| Jun 28, 2007 | Violations | 800438 | Deficient BMP Implementation | Dismissed | Inspection |
| Aug 17, 1998 | Enforcement actions | 405835 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Active | |
| Jul 02, 1998 | Violations | 844868 | Late Report | Violation | Report |
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.