Wastewater Treatment Plant
Active WDID 1 49I020487 Windsor, Sonoma County Region 1 · North Coast
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Windsor, Sonoma County
- Region 1 · North Coast · Location · Statewide map
- Receiving water
- Windsor Creek Pool Creek (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
- 369 distinct results, 10 reporting years (2016 to 2025)
- Most recent sample Apr 10, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 0 inspections · 1 violation record · 1 enforcement action
- 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
- 38.53881, -122.81222
- Precision
- 5 decimal places
- Shared point
- 2 permits report this exact point
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 8400 Windsor Rd, Windsor 95492
- Regional Water Board
- 1 — North Coast
HUC12 watershed Evidence: spatial
- Windsor Creek HUC12 180101100705
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
- Town of Windsor
- Primary industry (SIC)
- 4952-Sewerage Systems
- Application ID
- 312458
- NOI processed
- Oct 04, 2006
- Last certified
- Dec 21, 2023
- Facility size
- 7.31 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 312458 | Industrial | Active | Oct 04, 2006 | — | Dec 21, 2023 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Windsor Creek Pool Creek
- Discharges directly / indirectly
- Y / 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 |
|---|---|---|---|
| Russian River HU, Middle Russian River HA, Mark West HSA, Windsor Creek and its tributaries CAR1142302020130919047080 | 89 m | listed | 4 |
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.
369 distinct measurements across 3 parameters, most recent sample Apr 10, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 36 | 3 | 0 | Oct 13, 2025 | Apr 10, 2026 |
| 2024 | 42 | 3 | 0 | Nov 11, 2024 | Feb 13, 2025 |
| 2023 | 42 | 3 | 0 | Nov 18, 2023 | Jan 19, 2024 |
| 2022 | 30 | 3 | 0 | Dec 01, 2022 | Mar 04, 2023 |
| 2021 | 36 | 3 | 0 | Nov 01, 2021 | Apr 14, 2022 |
| 2020 | 30 | 3 | 0 | Nov 17, 2020 | Mar 09, 2021 |
| 2019 | 36 | 3 | 0 | Nov 30, 2019 | Mar 29, 2020 |
| 2018 | 57 | 3 | 0 | Nov 21, 2018 | Mar 09, 2019 |
| 2017 | 48 | 3 | 0 | Nov 10, 2017 | Jan 24, 2018 |
| 2016 | 12 | 3 | 0 | Nov 19, 2016 | Nov 19, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 123 | 79 | Nov 19, 2016 | Apr 10, 2026 | Results |
| pH | SU | 123 | 0 | Nov 19, 2016 | Apr 10, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 123 | 0 | Nov 19, 2016 | Apr 10, 2026 | Results |
All results (369 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 10, 2026 | Oil and Grease | DNQ 2.6 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Apr 10, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Apr 10, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Apr 10, 2026 | pH | 7.33 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Apr 10, 2026 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Apr 10, 2026 | pH | 7.39 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Apr 10, 2026 | Total Suspended Solids (TSS) | 33.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Apr 10, 2026 | Total Suspended Solids (TSS) | 35.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Apr 10, 2026 | Total Suspended Solids (TSS) | 148 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Feb 15, 2026 | Oil and Grease | DNQ 1.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Feb 15, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Feb 15, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Feb 15, 2026 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Feb 15, 2026 | pH | 7.26 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Feb 15, 2026 | pH | 7.45 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Feb 15, 2026 | Total Suspended Solids (TSS) | 13.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Feb 15, 2026 | Total Suspended Solids (TSS) | 58.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Feb 15, 2026 | Total Suspended Solids (TSS) | 15.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Nov 05, 2025 | Oil and Grease | DNQ 2.5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Nov 05, 2025 | Oil and Grease | DNQ 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Nov 05, 2025 | Oil and Grease | DNQ 2.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Nov 05, 2025 | pH | 7.31 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Nov 05, 2025 | pH | 7.39 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Nov 05, 2025 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Nov 05, 2025 | Total Suspended Solids (TSS) | 5.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Nov 05, 2025 | Total Suspended Solids (TSS) | 14.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Nov 05, 2025 | Total Suspended Solids (TSS) | 135 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Oct 13, 2025 | Oil and Grease | DNQ 3.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Oct 13, 2025 | Oil and Grease | DNQ 4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Oct 13, 2025 | Oil and Grease | DNQ 2.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356915 | |
| Oct 13, 2025 | pH | 7.01 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Oct 13, 2025 | pH | 7.38 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Oct 13, 2025 | pH | 7.34 | SU | Effluent | Qualifying Storm Event | A4500HB | 1356915 | |
| Oct 13, 2025 | Total Suspended Solids (TSS) | 37.5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Oct 13, 2025 | Total Suspended Solids (TSS) | 132 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Oct 13, 2025 | Total Suspended Solids (TSS) | 222 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356915 | |
| Feb 13, 2025 | Oil and Grease | 2.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1344160 | |
| Feb 13, 2025 | Oil and Grease | 3.6 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1344160 | |
| Feb 13, 2025 | Oil and Grease | 2.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1344160 | |
| Feb 13, 2025 | pH | 7.19 | SU | Effluent | Qualifying Storm Event | A4500HB | 1344160 | |
| Feb 13, 2025 | pH | 6.94 | SU | Effluent | Qualifying Storm Event | A4500HB | 1344160 | |
| Feb 13, 2025 | pH | 8.72 | SU | Effluent | Qualifying Storm Event | A4500HB | 1344160 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 17.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1344160 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 9.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1344160 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 129 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1344160 | |
| Jan 31, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1344158 | |
| Jan 31, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1344158 | |
| Jan 31, 2025 | pH | 6.84 | SU | Effluent | Qualifying Storm Event | A4500HB | 1344158 | |
| Jan 31, 2025 | pH | 6.98 | SU | Effluent | Qualifying Storm Event | A4500HB | 1344158 | |
| Jan 31, 2025 | Total Suspended Solids (TSS) | 12.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1344158 |
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 | 1 | 1 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 01, 2008 – Jul 01, 2008 | Oct 21, 2026 | All violations |
| Enforcement actions | 1 | 1 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 08, 2008 – Aug 08, 2008 | Oct 21, 2026 | All actions |
| Inspections | 0 | inspections, not findings | — | Oct 21, 2026 | |
| 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 (13 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 09, 2026 | Annual reports | 1336076 | Annual report 2025 | — | |
| Jul 15, 2025 | Annual reports | 1294921 | Annual report 2024 | — | |
| Jul 15, 2024 | Annual reports | 1244042 | Annual report 2023 | — | |
| Jul 13, 2023 | Annual reports | 1190078 | Annual report 2022 | — | |
| Jul 13, 2022 | Annual reports | 1113517 | Annual report 2021 | — | |
| Jul 08, 2021 | Annual reports | 1069566 | Annual report 2020 | — | |
| Jul 13, 2020 | Annual reports | 986889 | Annual report 2019 | — | |
| Jul 11, 2019 | Annual reports | 954477 | Annual report 2018 | — | |
| Jul 11, 2018 | Annual reports | 939895 | Annual report 2017 | — | |
| May 21, 2018 | Annual reports | 879190 | Annual report 2016 | — | |
| Jul 12, 2016 | Annual reports | 789218 | Annual report 2015 | — | |
| Aug 08, 2008 | Enforcement actions | 350953 | NNC (Notice of Non-Compliance) | Active | |
| Jul 01, 2008 | Violations | 780817 | 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.