Stony Point Rock Quarry
Active WDID 1 49I013793 Cotati, 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
- Cotati, Sonoma County
- Region 1 · North Coast · 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
- 2 waterbodies; 2 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 569 distinct results, 10 reporting years (2015 to 2025)
- Most recent sample Feb 17, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 4 inspections · 2 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
- 38.34409, -122.74131
- 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
- 7171 Stony Point Rd, Cotati 94931
- Regional Water Board
- 1 — North Coast
HUC12 watershed Evidence: spatial
- Upper Laguna De Santa Rosa HUC12 180101100701
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
- Soiland Co Inc
- Primary industry (SIC)
- 1429-Crushed and Broken Stone, NEC
- Application ID
- 178873
- NOI processed
- Mar 11, 1998
- Last certified
- Jun 08, 2015
- Facility size
- 121 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 178873 | Industrial | Active | Mar 11, 1998 | — | Jun 08, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Washoe Creek
- 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 |
|---|---|---|---|
| Russian River HU, Middle Russian River HA, Laguna HSA, tributaries to the Laguna de Santa Rosa (except Santa Rosa Creek and its tributaries) CAR1142100020131104054267 | 728 m | listed | 7 |
| Russian River HU, Middle Russian River HA, Laguna HSA, mainstem Laguna de Santa Rosa CAR1142100020131010055952 | 894 m | listed | 8 |
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.
569 distinct measurements across 9 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 | 6 | 6 | 0 | Feb 17, 2026 | Feb 17, 2026 |
| 2024 | 42 | 6 | 0 | Nov 22, 2024 | Mar 13, 2025 |
| 2023 | 13 | 7 | 0 | Feb 05, 2024 | Mar 12, 2024 |
| 2022 | 28 | 6 | 0 | Jan 04, 2023 | Mar 29, 2023 |
| 2021 | 12 | 6 | 0 | Nov 09, 2021 | Dec 13, 2021 |
| 2019 | 56 | 7 | 0 | Dec 02, 2019 | Mar 15, 2020 |
| 2018 | 63 | 7 | 0 | Nov 26, 2018 | Apr 05, 2019 |
| 2017 | 104 | 4 | 0 | Aug 09, 2017 | May 04, 2018 |
| 2016 | 180 | 4 | 0 | Oct 25, 2016 | Apr 07, 2017 |
| 2015 | 65 | 4 | 0 | Dec 10, 2015 | Jan 29, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| pH | SU | 122 | 0 | Dec 10, 2015 | Feb 17, 2026 | Results |
| Oil and Grease | mg/L | 121 | 29 | Dec 10, 2015 | Feb 17, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 120 | 9 | Dec 10, 2015 | Feb 17, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 120 | 7 | Dec 10, 2015 | Feb 17, 2026 | Results |
| Iron, Total | mg/L | 35 | 4 | Nov 26, 2018 | Feb 17, 2026 | Results |
| Copper, Total | mg/L | 17 | 9 | Nov 26, 2018 | Mar 15, 2020 | Results |
| Zinc, Total | mg/L | 17 | 17 | Nov 26, 2018 | Mar 15, 2020 | Results |
| Chemical Oxygen Demand (COD) | mg/L | 16 | 6 | Nov 09, 2021 | Feb 17, 2026 | Results |
| Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | mg/L | 1 | 1 | Feb 05, 2024 | Feb 05, 2024 | Results |
All results (569 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 17, 2026 | Chemical Oxygen Demand (COD) | 28 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1367930 | |
| Feb 17, 2026 | Iron, Total | .11 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1367930 | |
| Feb 17, 2026 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1367930 | |
| Feb 17, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1367930 | |
| Feb 17, 2026 | pH | 7.24 | SU | Effluent | Qualifying Storm Event | pH_Field | 1367930 | |
| Feb 17, 2026 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1367930 | |
| Mar 13, 2025 | Chemical Oxygen Demand (COD) | 18 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1326054 | |
| Mar 13, 2025 | Chemical Oxygen Demand (COD) | 7.6 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1326054 | |
| Mar 13, 2025 | Iron, Total | .021 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1326054 | |
| Mar 13, 2025 | Iron, Total | 1.3 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1326054 | |
| Mar 13, 2025 | Nitrite Plus Nitrate (as N) | .52 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1326054 | |
| Mar 13, 2025 | Nitrite Plus Nitrate (as N) | .95 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1326054 | |
| Mar 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1326054 | |
| Mar 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1326054 | |
| Mar 13, 2025 | pH | 8.02 | SU | Effluent | Qualifying Storm Event | pH_Field | 1326054 | |
| Mar 13, 2025 | pH | 8.35 | SU | Effluent | Qualifying Storm Event | pH_Field | 1326054 | |
| Mar 13, 2025 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1326054 | |
| Mar 13, 2025 | Total Suspended Solids (TSS) | 26 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1326054 | |
| Feb 03, 2025 | Chemical Oxygen Demand (COD) | ND 12 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1320562 | |
| Feb 03, 2025 | Iron, Total | 1.3 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1320562 | |
| Feb 03, 2025 | Nitrite Plus Nitrate (as N) | .72 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1320562 | |
| Feb 03, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1320562 | |
| Feb 03, 2025 | pH | 8.47 | SU | Effluent | Qualifying Storm Event | pH_Field | 1320562 | |
| Feb 03, 2025 | Total Suspended Solids (TSS) | 14 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1320562 | |
| Dec 17, 2024 | Chemical Oxygen Demand (COD) | 25 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1326931 | |
| Dec 17, 2024 | Iron, Total | 1.7 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1326931 | |
| Dec 17, 2024 | Nitrite Plus Nitrate (as N) | .6 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1326931 | |
| Dec 17, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1326931 | |
| Dec 17, 2024 | pH | 8.37 | SU | Effluent | Qualifying Storm Event | pH_Field | 1326931 | |
| Dec 17, 2024 | Total Suspended Solids (TSS) | 11 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1326931 | |
| Dec 13, 2024 | Chemical Oxygen Demand (COD) | 12 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1317532 | |
| Dec 13, 2024 | Iron, Total | 1.4 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1317532 | |
| Dec 13, 2024 | Nitrite Plus Nitrate (as N) | .78 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1317532 | |
| Dec 13, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1317532 | |
| Dec 13, 2024 | pH | 7.07 | SU | Effluent | Qualifying Storm Event | pH_Field | 1317532 | |
| Dec 13, 2024 | Total Suspended Solids (TSS) | 28 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1317532 | |
| Nov 22, 2024 | Chemical Oxygen Demand (COD) | 27 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1316244 | |
| Nov 22, 2024 | Chemical Oxygen Demand (COD) | 46 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1316244 | |
| Nov 22, 2024 | Iron, Total | .11 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1316244 | |
| Nov 22, 2024 | Iron, Total | 3.2 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1316244 | |
| Nov 22, 2024 | Nitrite Plus Nitrate (as N) | 1.8 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1316244 | |
| Nov 22, 2024 | Nitrite Plus Nitrate (as N) | 2.6 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1316244 | |
| Nov 22, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1316244 | |
| Nov 22, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1316244 | |
| Nov 22, 2024 | pH | 7.04 | SU | Effluent | Qualifying Storm Event | pH_Field | 1316244 | |
| Nov 22, 2024 | pH | 7.97 | SU | Effluent | Qualifying Storm Event | pH_Field | 1316244 | |
| Nov 22, 2024 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1316244 | |
| Nov 22, 2024 | Total Suspended Solids (TSS) | 100 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1316244 | |
| Mar 12, 2024 | Chemical Oxygen Demand (COD) | 23 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1283727 | |
| Mar 12, 2024 | Iron, Total | .25 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1283727 |
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, 2004 – Jul 01, 2010 | Oct 21, 2026 | All violations |
| Enforcement actions | 3 | 3 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 03, 2004 – Sep 23, 2010 | Oct 21, 2026 | All actions |
| Inspections | 4 | inspections, not findings | Jun 29, 2010 – Jun 11, 2019 | 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 (20 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 14, 2026 | Annual reports | 1337264 | Annual report 2025 | — | |
| Jul 10, 2025 | Annual reports | 1296168 | Annual report 2024 | — | |
| Jul 11, 2024 | Annual reports | 1245363 | Annual report 2023 | — | |
| Jul 12, 2023 | Annual reports | 1191469 | Annual report 2022 | — | |
| Jul 05, 2022 | Annual reports | 1115035 | Annual report 2021 | — | |
| Jul 06, 2021 | Annual reports | 1063127 | Annual report 2020 | — | |
| Jul 08, 2020 | Annual reports | 979999 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 956251 | Annual report 2018 | — | |
| Jun 11, 2019 | Inspections | 2043176 | B Type compliance | — | Follow-up Inspection Needed |
| Jun 29, 2018 | Annual reports | 941678 | Annual report 2017 | — | |
| Jul 14, 2017 | Annual reports | 881076 | Annual report 2016 | — | |
| Jul 15, 2016 | Annual reports | 845694 | Annual report 2015 | — | |
| Jan 04, 2016 | Inspections | 2028028 | B Type compliance | — | No Further Action |
| Apr 13, 2012 | Inspections | 2014975 | B Type compliance | — | No Further Action |
| Sep 23, 2010 | Enforcement actions | 402900 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Active | |
| Aug 04, 2010 | Enforcement actions | 402848 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Active | |
| Jul 01, 2010 | Violations | 842668 | Late Report | Violation | Report |
| Jun 29, 2010 | Inspections | 2006841 | B Type compliance | — | Follow-up Inspection Needed |
| Aug 03, 2004 | Enforcement actions | 252640 | NTC (Notice to Comply) | Historical | UNKNOWN |
| Jul 01, 2004 | Violations | 257811 | Deficient Report | Violation | Inspection |
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.