Stillwater Wastewater Treatment Plant
Active WDID 5R45I022199 Anderson, Shasta County Region 5R · Central Valley (Redding)
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Anderson, Shasta County
- Region 5R · Central Valley (Redding) · Location · Statewide map
- Receiving water
- Sacramento River (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
- 72 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Feb 24, 2026 · 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
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
- 40.47392, -122.28496
- 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
- 6475 Airport Rd, Anderson 96007
- Regional Water Board
- 5R — Central Valley (Redding)
HUC12 watershed Evidence: spatial
- Clover Creek-Sacramento River HUC12 180201540305
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
- City of Redding
- Primary industry (SIC)
- 4952-Sewerage Systems
- Application ID
- 367466
- NOI processed
- Jun 25, 2009
- Last certified
- Mar 14, 2024
- Facility size
- 233 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 367466 | Industrial | Active | Jun 25, 2009 | — | Mar 14, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Sacramento River
- 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
7 official waterbodies share 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 |
|---|---|---|---|
| Sacramento River (Keswick Dam to Cottonwood Creek) CAR5081000019990126144739 | 441 m | listed | 2 |
| Clover Creek (Shasta County) CAR5081000020110814234504 | 537 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.
72 distinct measurements across 3 parameters, most recent sample Feb 24, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 6 | 3 | 0 | Oct 25, 2025 | Feb 24, 2026 |
| 2024 | 6 | 3 | 0 | Nov 13, 2024 | Mar 02, 2025 |
| 2023 | 6 | 3 | 0 | Nov 18, 2023 | Jan 13, 2024 |
| 2022 | 6 | 3 | 0 | Nov 08, 2022 | Feb 24, 2023 |
| 2021 | 6 | 3 | 0 | Oct 21, 2021 | Apr 16, 2022 |
| 2020 | 6 | 3 | 0 | Dec 13, 2020 | Jan 04, 2021 |
| 2019 | 6 | 3 | 0 | Dec 07, 2019 | Mar 17, 2020 |
| 2018 | 6 | 3 | 0 | Nov 27, 2018 | Mar 20, 2019 |
| 2017 | 6 | 3 | 0 | Nov 15, 2017 | Jan 08, 2018 |
| 2016 | 6 | 3 | 0 | Oct 27, 2016 | Feb 02, 2017 |
| 2015 | 12 | 3 | 0 | Dec 03, 2015 | Apr 22, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 24 | 23 | Dec 03, 2015 | Feb 24, 2026 | Results |
| pH | SU | 24 | 0 | Dec 03, 2015 | Feb 24, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 24 | 1 | Dec 03, 2015 | Feb 24, 2026 | Results |
All results (72 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 24, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1374156 | |
| Feb 24, 2026 | pH | 7.37 | SU | Effluent | Qualifying Storm Event | pH_Field | 1374156 | |
| Feb 24, 2026 | Total Suspended Solids (TSS) | 14.5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1374156 | |
| Oct 25, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1358610 | |
| Oct 25, 2025 | pH | 7.22 | SU | Effluent | Qualifying Storm Event | pH_Field | 1358610 | |
| Oct 25, 2025 | Total Suspended Solids (TSS) | 8.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1358610 | |
| Mar 02, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1326807 | |
| Mar 02, 2025 | pH | 7.48 | SU | Effluent | Qualifying Storm Event | pH_Field | 1326807 | |
| Mar 02, 2025 | Total Suspended Solids (TSS) | 31.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1326807 | |
| Nov 13, 2024 | Oil and Grease | .85 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1316577 | |
| Nov 13, 2024 | pH | 7.21 | SU | Effluent | Qualifying Storm Event | pH_Field | 1316577 | |
| Nov 13, 2024 | Total Suspended Solids (TSS) | 7.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1316577 | |
| Jan 13, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1283405 | |
| Jan 13, 2024 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1283405 | |
| Jan 13, 2024 | Total Suspended Solids (TSS) | 13.44 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1283405 | |
| Nov 18, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1268600 | |
| Nov 18, 2023 | pH | 7.75 | SU | Effluent | Qualifying Storm Event | pH_Field | 1268600 | |
| Nov 18, 2023 | Total Suspended Solids (TSS) | 5.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1268600 | |
| Feb 24, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1231269 | |
| Feb 24, 2023 | pH | 7.26 | SU | Effluent | Qualifying Storm Event | pH_Field | 1231269 | |
| Feb 24, 2023 | Total Suspended Solids (TSS) | 1.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1231269 | |
| Nov 08, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1241022 | |
| Nov 08, 2022 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1241022 | |
| Nov 08, 2022 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1241022 | |
| Apr 16, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1187271 | |
| Apr 16, 2022 | pH | 7.31 | SU | Effluent | Qualifying Storm Event | pH_Field | 1187271 | |
| Apr 16, 2022 | Total Suspended Solids (TSS) | 3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1187271 | |
| Oct 21, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1187269 | |
| Oct 21, 2021 | pH | 7.51 | SU | Effluent | Qualifying Storm Event | pH_Field | 1187269 | |
| Oct 21, 2021 | Total Suspended Solids (TSS) | 24.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1187269 | |
| Jan 04, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1151001 | |
| Jan 04, 2021 | pH | 7.58 | SU | Effluent | Qualifying Storm Event | pH_Field | 1151001 | |
| Jan 04, 2021 | Total Suspended Solids (TSS) | 12 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1151001 | |
| Dec 13, 2020 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1151000 | |
| Dec 13, 2020 | pH | 7.37 | SU | Effluent | Qualifying Storm Event | pH_Field | 1151000 | |
| Dec 13, 2020 | Total Suspended Solids (TSS) | 25.6 | mg/L | Effluent | Qualifying Storm Event | 1151000 | ||
| Mar 17, 2020 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1102577 | |
| Mar 17, 2020 | pH | 7.17 | SU | Effluent | Qualifying Storm Event | A4500HB | 1102577 | |
| Mar 17, 2020 | Total Suspended Solids (TSS) | 9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1102577 | |
| Dec 07, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1095140 | |
| Dec 07, 2019 | pH | 7.41 | SU | Effluent | Qualifying Storm Event | A4500HB | 1095140 | |
| Dec 07, 2019 | Total Suspended Solids (TSS) | 10.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1095140 | |
| Mar 20, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1052090 | |
| Mar 20, 2019 | pH | 7.05 | SU | Effluent | Qualifying Storm Event | A4500HB | 1052090 | |
| Mar 20, 2019 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1052090 | |
| Nov 27, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1030430 | |
| Nov 27, 2018 | pH | 7.31 | SU | Effluent | Qualifying Storm Event | A4500HB | 1030430 | |
| Nov 27, 2018 | Total Suspended Solids (TSS) | 6.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1030430 | |
| Jan 08, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 991718 | |
| Jan 08, 2018 | pH | 7.09 | SU | Effluent | Qualifying Storm Event | A4500HB | 991718 |
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 | 0 | 0 Violation · 0 Potential (preliminary) · 0 Dismissed | — | Oct 21, 2026 | |
| Enforcement actions | 0 | 0 issued · 0 draft · 0 withdrawn, rescinded or superseded | — | Oct 21, 2026 | |
| 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 (11 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 11, 2026 | Annual reports | 1336960 | Annual report 2025 | — | |
| Apr 15, 2025 | Annual reports | 1295850 | Annual report 2024 | — | |
| Jun 24, 2024 | Annual reports | 1245020 | Annual report 2023 | — | |
| Jul 14, 2023 | Annual reports | 1191105 | Annual report 2022 | — | |
| Jun 30, 2022 | Annual reports | 1114635 | Annual report 2021 | — | |
| Jun 16, 2021 | Annual reports | 1070732 | Annual report 2020 | — | |
| Jun 17, 2020 | Annual reports | 988147 | Annual report 2019 | — | |
| Jul 08, 2019 | Annual reports | 955779 | Annual report 2018 | — | |
| Jun 08, 2018 | Annual reports | 941202 | Annual report 2017 | — | |
| Jun 16, 2017 | Annual reports | 880574 | Annual report 2016 | — | |
| Jun 07, 2016 | Annual reports | 843080 | Annual report 2015 | — |
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.