Lexington Quarry
Active WDID 2 43I025209 Los Gatos, Santa Clara 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
- Los Gatos, Santa Clara County
- Region 2 · San Francisco Bay · Location · Statewide map
- Receiving water
- Lexington Reservoir (as reported by the facility)
- Evidence: identification corroborated Lexington Reservoir Details
- Identified receiving water on the 2026 303(d) list
- Yes · 1 Appendix A decision, category 5 Evidence: State-published
- Describes the waterbody, not this facility · Waterbody profile
- 2026 Integrated Report waters within 1.0 km Evidence: geographic proximity
- 3 waterbodies; 2 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 44 distinct results, 7 reporting years (2015 to 2025)
- Most recent sample Feb 20, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 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
- 37.20056, -121.9813
- Precision
- 4 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
- 18500 Limekiln Canyon Road, Los Gatos 95033
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- Los Gatos Creek HUC12 180500030303
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
- Vulcan Materials Company
- Primary industry (SIC)
- 1429-Crushed and Broken Stone, NEC
- Application ID
- 451757
- NOI processed
- Dec 22, 2014
- Last certified
- Dec 13, 2024
- Facility size
- 68 Acres
- Impervious area
- 1 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 451757 | Industrial | Active | Dec 22, 2014 | — | Dec 13, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Lexington Reservoir
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: identification corroborated Lexington Reservoir CAL2054002020000304130209
Receiving water reported by facility — waterbody identification corroborated by geographic evidence.
Nearest distance from the reported facility location: 61 m. Method receiving_water/2.
2026 Integrated Report status Evidence: State-published
Lexington Reservoir is on the 2026 Clean Water Act section 303(d) list (1 Appendix A decision; category 5).
| Pollutant | Category | Listing decision | TMDL requirement | Decision ID |
|---|---|---|---|---|
| Mercury | 5 | List on 303(d) list (TMDL required list) | 5A | 151591 |
Published by the State Water Resources Control Board (2026 California Integrated Report, Appendix A). Listing status is taken from Appendix A only. State Board adoption 2026-02-03; USEPA approval not confirmed. A listing describes the waterbody, not this facility. Waterbody profile.
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 |
|---|---|---|---|
| Lexington Reservoir CAL2054002020000304130209 | 61 m | listed | 1 |
| Limekiln Creek subwatershed (Santa Clara County, tributary to Los Gatos Creek) CAR2054002020210602032271 | 107 m | not listed | 0 |
| Los Gatos Creek, Lower CAR2054005020171207059470 | 852 m | listed | 3 |
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.
44 distinct measurements across 5 parameters, most recent sample Feb 20, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 3 | 3 | 0 | Feb 20, 2026 | Feb 20, 2026 |
| 2022 | 6 | 3 | 0 | Jan 05, 2023 | Apr 12, 2023 |
| 2020 | 5 | 5 | 0 | Jan 28, 2021 | Jan 28, 2021 |
| 2019 | 3 | 3 | 0 | Apr 09, 2020 | Apr 09, 2020 |
| 2018 | 18 | 3 | 0 | Jan 17, 2019 | Mar 06, 2019 |
| 2016 | 6 | 3 | 0 | Jan 20, 2017 | Feb 07, 2017 |
| 2015 | 3 | 3 | 0 | Mar 07, 2016 | Mar 07, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 14 | 11 | Mar 07, 2016 | Feb 20, 2026 | Results |
| pH | SU | 14 | 0 | Mar 07, 2016 | Feb 20, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 14 | 0 | Mar 07, 2016 | Feb 20, 2026 | Results |
| Iron, Total Recoverable | ug/L | 1 | 0 | Jan 28, 2021 | Jan 28, 2021 | Results |
| Nitrate, Total (as N) | mg/L | 1 | 0 | Jan 28, 2021 | Jan 28, 2021 | Results |
All results (44 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 20, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1368406 | |
| Feb 20, 2026 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1368406 | |
| Feb 20, 2026 | Total Suspended Solids (TSS) | 26 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1368406 | |
| Apr 12, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1235949 | |
| Apr 12, 2023 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1235949 | |
| Apr 12, 2023 | Total Suspended Solids (TSS) | 3.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1235949 | |
| Jan 05, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1226367 | |
| Jan 05, 2023 | pH | 6.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1226367 | |
| Jan 05, 2023 | Total Suspended Solids (TSS) | 25 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1226367 | |
| Jan 28, 2021 | Iron, Total Recoverable | 4.7 | ug/L | Effluent | Qualifying Storm Event | SW6010B | 1144644 | |
| Jan 28, 2021 | Nitrate, Total (as N) | .28 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1144644 | |
| Jan 28, 2021 | Oil and Grease | 1.6 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1144644 | |
| Jan 28, 2021 | pH | 7.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1144644 | |
| Jan 28, 2021 | Total Suspended Solids (TSS) | 82 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1144644 | |
| Apr 09, 2020 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1107572 | |
| Apr 09, 2020 | pH | 6.39 | SU | Effluent | Qualifying Storm Event | pH_Field | 1107572 | |
| Apr 09, 2020 | Total Suspended Solids (TSS) | 1.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1107572 | |
| Mar 06, 2019 | Oil and Grease | ND 1.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1050426 | |
| Mar 06, 2019 | Oil and Grease | ND 1.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1050426 | |
| Mar 06, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1050426 | |
| Mar 06, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1050426 | |
| Mar 06, 2019 | Total Suspended Solids (TSS) | 391 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1050426 | |
| Mar 06, 2019 | Total Suspended Solids (TSS) | 67.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1050426 | |
| Feb 04, 2019 | Oil and Grease | ND 1.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1045891 | |
| Feb 04, 2019 | Oil and Grease | ND 1.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1045891 | |
| Feb 04, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1045891 | |
| Feb 04, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1045891 | |
| Feb 04, 2019 | Total Suspended Solids (TSS) | 25.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1045891 | |
| Feb 04, 2019 | Total Suspended Solids (TSS) | 111 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1045891 | |
| Jan 17, 2019 | Oil and Grease | 1.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1036440 | |
| Jan 17, 2019 | Oil and Grease | 1.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1036440 | |
| Jan 17, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1036440 | |
| Jan 17, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1036440 | |
| Jan 17, 2019 | Total Suspended Solids (TSS) | 25.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1036440 | |
| Jan 17, 2019 | Total Suspended Solids (TSS) | 140 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1036440 | |
| Feb 07, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 927911 | |
| Feb 07, 2017 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 927911 | |
| Feb 07, 2017 | Total Suspended Solids (TSS) | 40 | mg/L | Effluent | Qualifying Storm Event | A2540D | 927911 | |
| Jan 20, 2017 | Oil and Grease | DNQ 2.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 919496 | |
| Jan 20, 2017 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 919496 | |
| Jan 20, 2017 | Total Suspended Solids (TSS) | 39 | mg/L | Effluent | Qualifying Storm Event | A2540D | 919496 | |
| Mar 07, 2016 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 889734 | |
| Mar 07, 2016 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 889734 | |
| Mar 07, 2016 | Total Suspended Solids (TSS) | 8.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 889734 |
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 | 1 | inspections, not findings | Feb 21, 2018 – Feb 21, 2018 | 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 (12 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 14, 2026 | Annual reports | 1339102 | Annual report 2025 | — | |
| Jul 15, 2025 | Annual reports | 1298134 | Annual report 2024 | — | |
| Jul 11, 2024 | Annual reports | 1247403 | Annual report 2023 | — | |
| Jul 14, 2023 | Annual reports | 1193600 | Annual report 2022 | — | |
| Jun 30, 2022 | Annual reports | 1117443 | Annual report 2021 | — | |
| Jul 13, 2021 | Annual reports | 1065661 | Annual report 2020 | — | |
| Jul 10, 2020 | Annual reports | 982773 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 959124 | Annual report 2018 | — | |
| Jul 10, 2018 | Annual reports | 944560 | Annual report 2017 | — | |
| Feb 21, 2018 | Inspections | 2039542 | B Type compliance | — | No Further Action |
| Jul 14, 2017 | Annual reports | 883952 | Annual report 2016 | — | |
| Jul 15, 2016 | Annual reports | 843422 | 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.