Stevens Creek Quarry
Terminated WDID 2 43I006687 Cupertino, Santa Clara County Region 2 · San Francisco Bay
At a glance
- Permit Evidence: SMARTS record
- Terminated Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Cupertino, Santa Clara County
- Region 2 · San Francisco Bay · 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
- 375 distinct results, 6 reporting years (2015 to 2020)
- Most recent sample Jan 27, 2021 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 6 inspections · 2 violation records · 4 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
- 37.29869, -122.07901
- 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
- 12100 Stevens Canyon Rd, Cupertino 95014
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- Stevens Creek HUC12 180500030403
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
- Terminated
- Operator
- Stevens Creek Quarry Inc
- Primary industry (SIC)
- 1429-Crushed and Broken Stone, NEC
- Secondary SIC
- 4212-Local Trucking Without Storage
- Tertiary SIC
- 3272-Concrete Products, Except Block and Brick
- Application ID
- 183883
- NOI processed
- May 01, 1992
- Termination effective
- Jul 01, 2021
- Last certified
- Feb 27, 2015
- Facility size
- 162 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 183883 | Industrial | Terminated | May 01, 1992 | Jul 01, 2021 | Feb 27, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Swiss 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 |
|---|---|---|---|
| Stevens Creek Reservoir CAL2055003120050519182844 | 39 m | listed | 4 |
| Stevens Creek CAR2055002019990218134341 | 99 m | listed | 7 |
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.
375 distinct measurements across 11 parameters, most recent sample Jan 27, 2021.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2020 | 45 | 9 | 0 | Jan 27, 2021 | Jan 27, 2021 |
| 2019 | 131 | 11 | 0 | Dec 07, 2019 | Jan 17, 2020 |
| 2018 | 60 | 5 | 0 | Dec 17, 2018 | Jan 15, 2019 |
| 2017 | 30 | 5 | 0 | Jan 08, 2018 | Mar 13, 2018 |
| 2016 | 60 | 5 | 0 | Oct 28, 2016 | Feb 08, 2017 |
| 2015 | 49 | 4 | 0 | Dec 24, 2015 | Mar 07, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Iron, Total | mg/L | 62 | 1 | Dec 24, 2015 | Jan 27, 2021 | Results |
| pH | SU | 62 | 0 | Dec 24, 2015 | Jan 27, 2021 | Results |
| Total Suspended Solids (TSS) | mg/L | 62 | 2 | Dec 24, 2015 | Jan 27, 2021 | Results |
| Oil and Grease | mg/L | 59 | 43 | Dec 24, 2015 | Jan 27, 2021 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 49 | 4 | Oct 28, 2016 | Jan 27, 2021 | Results |
| Copper, Total | mg/L | 19 | 1 | Dec 07, 2019 | Jan 27, 2021 | Results |
| Selenium, Total | mg/L | 19 | 11 | Dec 07, 2019 | Jan 27, 2021 | Results |
| Magnesium, Total | mg/L | 18 | 0 | Dec 07, 2019 | Jan 27, 2021 | Results |
| Chromium (VI) Total Recoverable | ug/L | 14 | 1 | Dec 07, 2019 | Jan 17, 2020 | Results |
| Aluminum, Total | mg/L | 10 | 1 | Jan 16, 2020 | Jan 27, 2021 | Results |
| Manganese, Total | mg/L | 1 | 0 | Dec 25, 2019 | Dec 25, 2019 | Results |
All results (375 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Jan 27, 2021 | Aluminum, Total | 22.2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Aluminum, Total | 11.3 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Aluminum, Total | 25.3 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Aluminum, Total | 2.65 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Aluminum, Total | 45.5 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Copper, Total | .0665 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Copper, Total | .0336 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Copper, Total | .0575 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Copper, Total | .0113 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Copper, Total | .075 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Iron, Total | 44.2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Iron, Total | 20.3 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Iron, Total | 46.2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Iron, Total | 5.61 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Iron, Total | 103 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Magnesium, Total | 29.8 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Magnesium, Total | 16.8 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Magnesium, Total | 29 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Magnesium, Total | 10.8 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Magnesium, Total | 79.2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Nitrite Plus Nitrate (as N) | 1 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1144081 | |
| Jan 27, 2021 | Nitrite Plus Nitrate (as N) | 4.3 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1144081 | |
| Jan 27, 2021 | Nitrite Plus Nitrate (as N) | 2.5 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1144081 | |
| Jan 27, 2021 | Nitrite Plus Nitrate (as N) | DNQ .38 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1144081 | |
| Jan 27, 2021 | Nitrite Plus Nitrate (as N) | .87 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1144081 | |
| Jan 27, 2021 | Oil and Grease | DNQ 3.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1144081 | |
| Jan 27, 2021 | Oil and Grease | 5.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1144081 | |
| Jan 27, 2021 | Oil and Grease | DNQ 4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1144081 | |
| Jan 27, 2021 | Oil and Grease | DNQ 1.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1144081 | |
| Jan 27, 2021 | Oil and Grease | DNQ 3.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1144081 | |
| Jan 27, 2021 | pH | 8.28 | SU | Effluent | Qualifying Storm Event | pH_Field | 1144081 | |
| Jan 27, 2021 | pH | 8.95 | SU | Effluent | Qualifying Storm Event | pH_Field | 1144081 | |
| Jan 27, 2021 | pH | 8.39 | SU | Effluent | Qualifying Storm Event | pH_Field | 1144081 | |
| Jan 27, 2021 | pH | 8.06 | SU | Effluent | Qualifying Storm Event | pH_Field | 1144081 | |
| Jan 27, 2021 | pH | 8.42 | SU | Effluent | Qualifying Storm Event | pH_Field | 1144081 | |
| Jan 27, 2021 | Selenium, Total | .004 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Selenium, Total | .0036 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Selenium, Total | .0054 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Selenium, Total | DNQ .00088 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Selenium, Total | .005 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144081 | |
| Jan 27, 2021 | Total Suspended Solids (TSS) | 304 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1144081 | |
| Jan 27, 2021 | Total Suspended Solids (TSS) | 254 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1144081 | |
| Jan 27, 2021 | Total Suspended Solids (TSS) | 490 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1144081 | |
| Jan 27, 2021 | Total Suspended Solids (TSS) | 14.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1144081 | |
| Jan 27, 2021 | Total Suspended Solids (TSS) | 429 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1144081 | |
| Jan 17, 2020 | Aluminum, Total | 1.61 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1099715 | |
| Jan 17, 2020 | Aluminum, Total | 1.45 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1099715 | |
| Jan 17, 2020 | Aluminum, Total | 1.09 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1099715 | |
| Jan 17, 2020 | Aluminum, Total | DNQ .0512 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1099715 | |
| Jan 17, 2020 | Chromium (VI) Total Recoverable | 4.6 | ug/L | Effluent | Qualifying Storm Event | 1099715 |
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 | Nov 04, 2016 – May 30, 2017 | Oct 21, 2026 | All violations |
| Enforcement actions | 4 | 4 issued · 0 draft · 0 withdrawn, rescinded or superseded | May 30, 2017 – Oct 11, 2019 | Oct 21, 2026 | All actions |
| Inspections | 6 | inspections, not findings | Jan 28, 2016 – Feb 19, 2021 | Oct 21, 2026 | All inspections |
| Annual reports | 6 | certified reports (contents not shown) | 2015 – 2020 | 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 (18 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 23, 2021 | Annual reports | 1063165 | Annual report 2020 | — | |
| Feb 19, 2021 | Inspections | 2051350 | B Type compliance | Finalized | Additional Info Required |
| Jul 01, 2020 | Annual reports | 980038 | Annual report 2019 | — | |
| Jan 29, 2020 | Inspections | 2046423 | Enforcement Follow-up | — | Additional Info Required |
| Oct 11, 2019 | Enforcement actions | 434272 | NOV (Notice of Violation) | Active | |
| Jul 12, 2019 | Annual reports | 956291 | Annual report 2018 | — | |
| Dec 07, 2018 | Inspections | 2040721 | Enforcement Follow-up | — | Additional Info Required |
| Nov 08, 2018 | Enforcement actions | 434271 | 13267 Letter/Order (Water Code section 13267 letter or order) | Active | |
| Jul 16, 2018 | Annual reports | 941718 | Annual report 2017 | — | |
| Apr 02, 2018 | Enforcement actions | 429477 | 13267 Letter/Order (Water Code section 13267 letter or order) | Active | |
| Sep 08, 2017 | Inspections | 2037385 | Enforcement Follow-up | — | Additional Info Required |
| Jul 18, 2017 | Annual reports | 881116 | Annual report 2016 | — | |
| May 30, 2017 | Enforcement actions | 426202 | 13267 Letter/Order (Water Code section 13267 letter or order) | Active | |
| May 30, 2017 | Violations | 866554 | Enforcement Action | Violation | Report |
| Nov 04, 2016 | Inspections | 2032762 | B Type compliance | — | Follow-up Inspection Needed |
| Nov 04, 2016 | Violations | 863427 | Enforcement Action | Violation | Inspection |
| Jul 11, 2016 | Annual reports | 840235 | Annual report 2015 | — | |
| Jan 28, 2016 | Inspections | 2028684 | B Type compliance | — | Additional Info Required |
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.