Antioch Unified School District
Active WDID 5S07I006937 Antioch, Contra Costa County Region 5S · Central Valley (Sacramento)
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Antioch, Contra Costa County
- Region 5S · Central Valley (Sacramento) · Location · Statewide map
- 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; 0 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 204 distinct results, 10 reporting years (2016 to 2025)
- Most recent sample May 28, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 2 inspections · 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
- 38.00499, -121.81548
- 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
- 701 W 18th St, Antioch 94509
- Regional Water Board
- 5S — Central Valley (Sacramento)
HUC12 watershed Evidence: spatial
- Markley Canyon-San Joaquin River HUC12 180400030907
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
- Antioch Unified School District
- Primary industry (SIC)
- 4151-School Buses
- Application ID
- 198155
- NOI processed
- May 11, 1992
- Last certified
- Sep 11, 2024
- Facility size
- 5 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 198155 | Industrial | Active | May 11, 1992 | — | Sep 11, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- San JuaQuin River
- Discharges directly / indirectly
- N / Y (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 |
|---|---|---|---|
| West Antioch Creek (in Delta Waterways, western portion) CAR5440000020200310037140 | 633 m | not listed | 0 |
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.
204 distinct measurements across 3 parameters, most recent sample May 28, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 24 | 3 | 0 | Nov 13, 2025 | May 28, 2026 |
| 2024 | 24 | 3 | 0 | Dec 16, 2024 | Mar 12, 2025 |
| 2023 | 24 | 3 | 0 | Dec 18, 2023 | Mar 23, 2024 |
| 2022 | 24 | 3 | 0 | Nov 01, 2022 | Feb 03, 2023 |
| 2021 | 12 | 3 | 0 | Oct 24, 2021 | Nov 01, 2021 |
| 2020 | 24 | 3 | 0 | Dec 17, 2020 | Feb 11, 2021 |
| 2019 | 18 | 3 | 0 | Dec 02, 2019 | Jan 16, 2020 |
| 2018 | 6 | 3 | 0 | Jan 15, 2019 | Jan 15, 2019 |
| 2017 | 24 | 3 | 0 | Nov 16, 2017 | Mar 01, 2018 |
| 2016 | 24 | 3 | 0 | Nov 20, 2016 | Feb 03, 2017 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 68 | 28 | Nov 20, 2016 | May 28, 2026 | Results |
| pH | SU | 68 | 0 | Nov 20, 2016 | May 28, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 68 | 1 | Nov 20, 2016 | May 28, 2026 | Results |
All results (204 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| May 28, 2026 | Oil and Grease | < 4.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1374093 | |
| May 28, 2026 | Oil and Grease | < 4.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1374093 | |
| May 28, 2026 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1374093 | |
| May 28, 2026 | pH | 7.4 | SU | Effluent | Qualifying Storm Event | pH_Field | 1374093 | |
| May 28, 2026 | Total Suspended Solids (TSS) | 15 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1374093 | |
| May 28, 2026 | Total Suspended Solids (TSS) | 15 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1374093 | |
| Apr 10, 2026 | Oil and Grease | < 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1373484 | |
| Apr 10, 2026 | Oil and Grease | 2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1373484 | |
| Apr 10, 2026 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1373484 | |
| Apr 10, 2026 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1373484 | |
| Apr 10, 2026 | Total Suspended Solids (TSS) | 32.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373484 | |
| Apr 10, 2026 | Total Suspended Solids (TSS) | 28.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373484 | |
| Feb 17, 2026 | Oil and Grease | < 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1373482 | |
| Feb 17, 2026 | Oil and Grease | < 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1373482 | |
| Feb 17, 2026 | pH | 7.4 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1373482 | |
| Feb 17, 2026 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1373482 | |
| Feb 17, 2026 | Total Suspended Solids (TSS) | 26.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373482 | |
| Feb 17, 2026 | Total Suspended Solids (TSS) | 18.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373482 | |
| Nov 13, 2025 | Oil and Grease | 2.5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1373480 | |
| Nov 13, 2025 | Oil and Grease | 2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1373480 | |
| Nov 13, 2025 | pH | 7.4 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1373480 | |
| Nov 13, 2025 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1373480 | |
| Nov 13, 2025 | Total Suspended Solids (TSS) | 64 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373480 | |
| Nov 13, 2025 | Total Suspended Solids (TSS) | 38 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373480 | |
| Mar 12, 2025 | Oil and Grease | < 4.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1331613 | |
| Mar 12, 2025 | Oil and Grease | < 5.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1331613 | |
| Mar 12, 2025 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1331613 | |
| Mar 12, 2025 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1331613 | |
| Mar 12, 2025 | Total Suspended Solids (TSS) | 66 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1331613 | |
| Mar 12, 2025 | Total Suspended Solids (TSS) | 41.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1331613 | |
| Feb 13, 2025 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1331611 | |
| Feb 13, 2025 | Oil and Grease | < 4.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1331611 | |
| Feb 13, 2025 | pH | 7.4 | SU | Effluent | Qualifying Storm Event | pH_Field | 1331611 | |
| Feb 13, 2025 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1331611 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 39.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1331611 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 26 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1331611 | |
| Feb 04, 2025 | Oil and Grease | 4.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1331608 | |
| Feb 04, 2025 | Oil and Grease | 2.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1331608 | |
| Feb 04, 2025 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1331608 | |
| Feb 04, 2025 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1331608 | |
| Feb 04, 2025 | Total Suspended Solids (TSS) | 130 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1331608 | |
| Feb 04, 2025 | Total Suspended Solids (TSS) | 94 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1331608 | |
| Dec 16, 2024 | Oil and Grease | 2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1319880 | |
| Dec 16, 2024 | Oil and Grease | 2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1319880 | |
| Dec 16, 2024 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1319880 | |
| Dec 16, 2024 | pH | 7.4 | SU | Effluent | Qualifying Storm Event | pH_Field | 1319880 | |
| Dec 16, 2024 | Total Suspended Solids (TSS) | 46.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1319880 | |
| Dec 16, 2024 | Total Suspended Solids (TSS) | 50 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1319880 | |
| Mar 23, 2024 | Oil and Grease | < 4.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1286647 | |
| Mar 23, 2024 | Oil and Grease | < 4.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1286647 |
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 01, 2005 – Jul 01, 2009 | Oct 21, 2026 | All violations |
| Enforcement actions | 2 | 2 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 11, 2005 – Oct 23, 2009 | Oct 21, 2026 | All actions |
| Inspections | 2 | inspections, not findings | Dec 02, 2015 – Nov 13, 2023 | 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 | 1 | reports, by parameter | 2020-21 – 2020-21 | 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 (18 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 29, 2026 | Annual reports | 1334567 | Annual report 2025 | — | |
| Jun 09, 2025 | Annual reports | 1293355 | Annual report 2024 | — | |
| Jun 13, 2024 | Annual reports | 1242381 | Annual report 2023 | — | |
| Nov 13, 2023 | Inspections | 2062619 | B Type compliance | Finalized | Additional Info Required |
| Jun 05, 2023 | Annual reports | 1188340 | Annual report 2022 | — | |
| Jun 27, 2022 | Annual reports | 1111635 | Annual report 2021 | — | |
| Jun 10, 2021 | Annual reports | 1067599 | Annual report 2020 | — | |
| Jul 13, 2020 | Annual reports | 984784 | Annual report 2019 | — | |
| Jul 18, 2019 | Annual reports | 952297 | Annual report 2018 | — | |
| Jun 25, 2018 | Annual reports | 937710 | Annual report 2017 | — | |
| Jul 05, 2017 | Annual reports | 876889 | Annual report 2016 | — | |
| Jun 27, 2016 | Annual reports | 847285 | Annual report 2015 | — | |
| Dec 02, 2015 | Inspections | 2027907 | B Type compliance | — | No Further Action |
| Oct 23, 2009 | Enforcement actions | 401566 | SEL (Staff Enforcement Letter) | Historical | |
| Jul 01, 2009 | Violations | 841363 | Deficient BMP Implementation | Violation | Report |
| Aug 11, 2005 | Enforcement actions | 309415 | NNC (Notice of Non-Compliance) | Historical | |
| Jul 01, 2005 | Violations | 431232 | Late Report | Violation | Report |
| — | Water-quality-based corrective action reports | 1151047 | WQBCAR 2020-21 | — | pH |
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.