San Lorenzo Unified School District
Active WDID 2 01I005615 San Lorenzo, Alameda County Region 2 · San Francisco Bay
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- San Lorenzo, Alameda County
- Region 2 · San Francisco Bay · Location · Statewide map
- Receiving water
- San Lorenzo Creek (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
- 2 waterbodies; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 57 distinct results, 7 reporting years (2016 to 2025)
- Most recent sample Feb 17, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 4 violation records · 5 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
- 37.68899, -122.12875
- 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
- 15510 Usher St, San Lorenzo 94580
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- Sausal Creek-Frontal San Francisco Bay Estuaries HUC12 180500040805
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
- San Lorenzo Unified School District
- Primary industry (SIC)
- 4151-School Buses
- Application ID
- 180788
- NOI processed
- Apr 13, 1992
- Last certified
- Apr 10, 2026
- Facility size
- 2 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 180788 | Industrial | Active | Apr 13, 1992 | — | Apr 10, 2026 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- San Lorenzo Creek
- Discharges directly / indirectly
- N / Y (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)
- C3 facility HUC12 not corroborated (complete published list)
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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| San Lorenzo Creek CAR2042002319990218140753 | 431 m | listed | 1 |
| Estudillo Canal (Alameda) CAR2042003020210406068794 | 643 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.
57 distinct measurements across 4 parameters, most recent sample Feb 17, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 12 | 3 | 0 | Nov 17, 2025 | Feb 17, 2026 |
| 2022 | 6 | 3 | 0 | Nov 09, 2022 | Dec 29, 2022 |
| 2021 | 9 | 3 | 0 | Oct 22, 2021 | Dec 14, 2021 |
| 2020 | 3 | 3 | 0 | Dec 14, 2020 | Dec 14, 2020 |
| 2018 | 8 | 4 | 0 | Dec 17, 2018 | Feb 04, 2019 |
| 2017 | 3 | 3 | 0 | Jan 04, 2018 | Jan 04, 2018 |
| 2016 | 16 | 4 | 0 | Oct 28, 2016 | Feb 03, 2017 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 17 | 13 | Oct 28, 2016 | Feb 17, 2026 | Results |
| pH | SU | 17 | 0 | Oct 28, 2016 | Feb 17, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 17 | 0 | Oct 28, 2016 | Feb 17, 2026 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 6 | 0 | Oct 28, 2016 | Feb 04, 2019 | Results |
All results (57 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 17, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1369614 | |
| Feb 17, 2026 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1369614 | |
| Feb 17, 2026 | Total Suspended Solids (TSS) | 28.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1369614 | |
| Jan 05, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1371208 | |
| Jan 05, 2026 | pH | 6.61 | SU | Effluent | Qualifying Storm Event | pH_Field | 1371208 | |
| Jan 05, 2026 | Total Suspended Solids (TSS) | 35.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1371208 | |
| Dec 22, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1371206 | |
| Dec 22, 2025 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1371206 | |
| Dec 22, 2025 | Total Suspended Solids (TSS) | 33 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1371206 | |
| Nov 17, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1371204 | |
| Nov 17, 2025 | pH | 6.74 | SU | Effluent | Qualifying Storm Event | pH_Field | 1371204 | |
| Nov 17, 2025 | Total Suspended Solids (TSS) | 11.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1371204 | |
| Dec 29, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1237101 | |
| Dec 29, 2022 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1237101 | |
| Dec 29, 2022 | Total Suspended Solids (TSS) | 16.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1237101 | |
| Nov 09, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1237100 | |
| Nov 09, 2022 | pH | 6.76 | SU | Effluent | Qualifying Storm Event | pH_Field | 1237100 | |
| Nov 09, 2022 | Total Suspended Solids (TSS) | 70 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1237100 | |
| Dec 14, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1199398 | |
| Dec 14, 2021 | pH | 6.73 | SU | Effluent | Qualifying Storm Event | pH_Field | 1199398 | |
| Dec 14, 2021 | Total Suspended Solids (TSS) | .2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1199398 | |
| Oct 25, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1171336 | |
| Oct 25, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1171336 | |
| Oct 25, 2021 | Total Suspended Solids (TSS) | 30.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1171336 | |
| Oct 22, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1171333 | |
| Oct 22, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1171333 | |
| Oct 22, 2021 | Total Suspended Solids (TSS) | 92.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1171333 | |
| Dec 14, 2020 | Oil and Grease | 1.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1138301 | |
| Dec 14, 2020 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1138301 | |
| Dec 14, 2020 | Total Suspended Solids (TSS) | 37.5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1138301 | |
| Feb 04, 2019 | Electrical Conductivity @ 25 Deg. C | 16.3 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1074633 | |
| Feb 04, 2019 | Oil and Grease | 1.2 | mg/L | Effluent | Qualifying Storm Event | A5220B | 1074633 | |
| Feb 04, 2019 | pH | 6.67 | SU | Effluent | Qualifying Storm Event | A4500HB | 1074633 | |
| Feb 04, 2019 | Total Suspended Solids (TSS) | 8.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1074633 | |
| Dec 17, 2018 | Electrical Conductivity @ 25 Deg. C | 25.8 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1060767 | |
| Dec 17, 2018 | Oil and Grease | 5.3 | mg/L | Effluent | Qualifying Storm Event | A5220B | 1060767 | |
| Dec 17, 2018 | pH | 6.06 | SU | Effluent | Qualifying Storm Event | A4500HB | 1060767 | |
| Dec 17, 2018 | Total Suspended Solids (TSS) | 35.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1060767 | |
| Jan 04, 2018 | Oil and Grease | 1.1 | mg/L | Effluent | Qualifying Storm Event | A5220B | 1003365 | |
| Jan 04, 2018 | pH | 6.42 | SU | Effluent | Qualifying Storm Event | A4500HB | 1003365 | |
| Jan 04, 2018 | Total Suspended Solids (TSS) | 30.5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1003365 | |
| Feb 03, 2017 | Electrical Conductivity @ 25 Deg. C | 14.7 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 975668 | |
| Feb 03, 2017 | Oil and Grease | < 1.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 975668 | |
| Feb 03, 2017 | pH | 6.55 | SU | Effluent | Qualifying Storm Event | A4500HB | 975668 | |
| Feb 03, 2017 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 975668 | |
| Jan 05, 2017 | Electrical Conductivity @ 25 Deg. C | 13.1 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 975667 | |
| Jan 05, 2017 | Oil and Grease | < 1.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 975667 | |
| Jan 05, 2017 | pH | 6.78 | SU | Effluent | Qualifying Storm Event | A4500HB | 975667 | |
| Jan 05, 2017 | Total Suspended Solids (TSS) | 6.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 975667 | |
| Nov 28, 2016 | Electrical Conductivity @ 25 Deg. C | 38.8 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 975666 |
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 | 4 | 4 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 02, 2007 – Aug 15, 2015 | Oct 21, 2026 | All violations |
| Enforcement actions | 5 | 5 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 06, 2007 – Oct 30, 2015 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Jun 07, 2017 – Jun 07, 2017 | Oct 21, 2026 | All inspections |
| Annual reports | 10 | certified reports (contents not shown) | 2016 – 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 (20 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 30, 2026 | Annual reports | 1336174 | Annual report 2025 | — | |
| Jul 15, 2025 | Annual reports | 1295027 | Annual report 2024 | — | |
| Jul 10, 2024 | Annual reports | 1244152 | Annual report 2023 | — | |
| Jul 14, 2023 | Annual reports | 1190198 | Annual report 2022 | — | |
| Jul 15, 2022 | Annual reports | 1113653 | Annual report 2021 | — | |
| Jul 02, 2021 | Annual reports | 1069707 | Annual report 2020 | — | |
| Jul 06, 2020 | Annual reports | 987041 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 954635 | Annual report 2018 | — | |
| Jul 11, 2018 | Annual reports | 940053 | Annual report 2017 | — | |
| Oct 11, 2017 | Annual reports | 879357 | Annual report 2016 | — | |
| Jun 07, 2017 | Inspections | 2033997 | Inspection from Vehicle | — | No Further Action |
| Oct 30, 2015 | Enforcement actions | 421298 | NNC (Notice of Non-Compliance) | Active | |
| Aug 15, 2015 | Violations | 858977 | Failure to Obtain Permit | Violation | Report |
| Jan 30, 2014 | Enforcement actions | 415711 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Active | |
| Jul 02, 2013 | Violations | 854017 | Late Report | Violation | Report |
| Sep 30, 2010 | Enforcement actions | 402940 | NOV (Notice of Violation) | Active | |
| Sep 30, 2010 | Enforcement actions | 402941 | EPL (Expedited Payment Letter) | Historical | R2-2011-0105 |
| Jul 02, 2010 | Violations | 842715 | Late Report | Violation | Report |
| Aug 06, 2007 | Enforcement actions | 357818 | NNC (Notice of Non-Compliance) | Historical | |
| Jul 02, 2007 | Violations | 799092 | 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.