Granite Rock Co Wilson Quarry BR110

Active WDID 3 35I012503 Aromas, San Benito County Region 3 · Central Coast

At a glance

Permit Evidence: SMARTS record
Active Industrial
Notice of Intent (WDID code I) · Permits and applications
Location Evidence: facility-reported
Aromas, San Benito County
Region 3 · Central Coast · Location · Statewide map
Receiving water
Pajaro River (as reported by the facility)
Evidence: identification corroborated Pajaro River Details
Identified receiving water on the 2026 303(d) list
Yes · 26 Appendix A decisions, category 5 Evidence: State-published
Describes the waterbody, not this facility · Waterbody profile
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
295 distinct results, 11 reporting years (2015 to 2025)
Most recent sample Apr 02, 2026 · Monitoring
Compliance and enforcement records Evidence: SMARTS record
3 inspections · 1 violation record · 1 enforcement action
Counts as published in SMARTS; not a compliance determination · Details
SMARTS TMDL records Evidence: SMARTS-reported
0 records
TMDL records

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

Open this facility on the statewide map

Reported location Evidence: facility-reported

Coordinates
36.89728, -121.63477
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
Ar Wilson and End Of Quarry Rd, Aromas 95004
Regional Water Board
3 — Central Coast

HUC12 watershed Evidence: spatial

  • Lower Pajaro River HUC12 180600020805

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
Granite Rock Co AR Wilson Quarry
Primary industry (SIC)
1423-Crushed and Broken Granite
Secondary SIC
2951-Asphalt Paving Mixtures and Blocks
Application ID
185300
NOI processed
Aug 15, 1996
Last certified
May 24, 2023
Facility size
2000 Acres
Impervious area
1.5 %

Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.

Permit history

Storm water applications for this WDID, newest first
ApplicationTypeStatusProcessedTerminatedCertified
185300 IndustrialActiveAug 15, 1996 —May 24, 2023

Every storm water application SMARTS records for this WDID, newest first (1).

Receiving water

Reported by the facility Evidence: facility-reported
Pajaro River
Discharges directly / indirectly
Y / N (as answered in the permit application)

Evidence: identification corroborated Pajaro River CAR3051003019980826115152

Receiving water reported by facility — waterbody identification corroborated by geographic evidence.

Nearest distance from the reported facility location: 335 m. Method receiving_water/2.

2026 Integrated Report status Evidence: State-published

Pajaro River is on the 2026 Clean Water Act section 303(d) list (26 Appendix A decisions; category 5).

2026 Appendix A decisions for the identified receiving water
PollutantCategoryListing decisionTMDL requirementDecision ID
Aluminum5List on 303(d) list (TMDL required list) 5A151449
Benthic Community Effects5List on 303(d) list (TMDL required list) 5A131883
Boron5Do Not Delist from 303(d) list (TMDL required list) 5A69845
Chlordane5Do Not Delist from 303(d) list (TMDL required list) 5A148902
Chloride5Do Not Delist from 303(d) list (TMDL required list) 5A87200
Chlorpyrifos5Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) 5B · Pajaro River Chlorpyrifos and Diazinon TMDL107058
Chromium5Do Not Delist from 303(d) list (TMDL required list) 5A107141
DDD (Dichlorodiphenyldichloroethane)5Do Not Delist from 303(d) list (TMDL required list) 5A150814
DDE (Dichlorodiphenyldichloroethylene)5Do Not Delist from 303(d) list (TMDL required list) 5A150817
DDT (Dichlorodiphenyltrichloroethane)5Do Not Delist from 303(d) list (TMDL required list) 5A150819
Dieldrin5Do Not Delist from 303(d) list (TMDL required list) 5A148907
Escherichia coli (E. coli)5Do Not Delist from 303(d) list (TMDL required list) 5A125870
Heptachlor epoxide5List on 303(d) list (TMDL required list) 5A148913
Imidacloprid5Do Not Delist from 303(d) list (TMDL required list) 5A148927
Manganese5List on 303(d) list (TMDL required list) 5A107079
Nickel5List on 303(d) list (TMDL required list) 5A107084
Nitrate5Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) 5B · Pajaro River Watershed Nutrients150841
Oxyfluorfen5List on 303(d) list (TMDL required list) 5A129864
Oxygen, Dissolved5Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) 5B · Pajaro River Watershed Nutrients107091
PCBs (Polychlorinated biphenyls)5Do Not Delist from 303(d) list (TMDL required list) 5A148921
pH5Do Not Delist from 303(d) list (TMDL required list) 5A107093
Sedimentation/Siltation5List on 303(d) list (being addressed by USEPA approved TMDL) 5B · Pajaro River Siltation/Sedimentation (including San Benito R., Llagas Cr., Rider Gulch Cr.)69273
Selenium5List on 303(d) list (TMDL required list) 5A107101
Sodium5Do Not Delist from 303(d) list (TMDL required list) 5A75362
Toxicity5Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) 5B · Pajaro River Chlorpyrifos and Diazinon TMDL107105
Turbidity5Do Not Delist from 303(d) list (TMDL required list) 5A107108

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.

Nearest 2026 Integrated Report waterbodies
Waterbody (2026 Integrated Report)Distance2026 303(d) listAppendix A decisions
Pajaro River CAR3051003019980826115152335 m listed26

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.

295 distinct measurements across 7 parameters, most recent sample Apr 02, 2026.

By reporting year

Distinct results by reporting year
Reporting year (July–June)Distinct resultsParametersWith several versionsFirst sampleLast sample
2025484 0 Nov 13, 2025Apr 02, 2026
2024284 0 Dec 27, 2024Mar 13, 2025
2023324 0 Oct 26, 2023Apr 04, 2024
2022324 0 Nov 08, 2022Feb 24, 2023
2021124 0 Dec 13, 2021Dec 13, 2021
2020166 0 Jan 27, 2021Jan 27, 2021
2019126 0 Jan 16, 2020Jan 16, 2020
2018207 0 Nov 29, 2018Feb 07, 2019
201766 0 Mar 16, 2018Mar 16, 2018
2016497 0 Dec 15, 2016Feb 15, 2017
2015407 0 Nov 02, 2015Mar 07, 2016

By parameter

Distinct results by parameter
ParameterUnitsMeasurementsBelow detectionFirst sampleLast sampleResults
Oil and Greasemg/L60 50Nov 02, 2015Apr 02, 2026 Results
pHSU60 0Nov 02, 2015Apr 02, 2026 Results
Total Suspended Solids (TSS)mg/L60 1Nov 02, 2015Apr 02, 2026 Results
Nitrite Plus Nitrate (as N)mg/L56 12Dec 10, 2015Apr 02, 2026 Results
Nitrate, Total (as N)mg/L22 7Nov 02, 2015Jan 27, 2021 Results
Nitrite, Total (as N)mg/L22 17Nov 02, 2015Jan 27, 2021 Results
Electrical Conductivity @ 25 Deg. Cumhos/cm15 0Nov 02, 2015Feb 07, 2019 Results

pH results (60 distinct rows, show all)

Reported monitoring results, newest first
Sample dateParameterResultUnitsLocation typeEventMethodReportVersions
Apr 02, 2026 pH 7.16 SU Effluent Qualifying Storm Event pH_Field 1371861
Feb 24, 2026 pH 7.94 SU Effluent Qualifying Storm Event pH_Field 1371860
Feb 19, 2026 pH 7.14 SU Effluent Qualifying Storm Event pH_Field 1371859
Feb 18, 2026 pH 7.12 SU Effluent Qualifying Storm Event pH_Field 1371859
Feb 17, 2026 pH 7.32 SU Effluent Qualifying Storm Event pH_Field 1371859
Feb 17, 2026 pH 7.24 SU Effluent Qualifying Storm Event pH_Field 1371859
Feb 17, 2026 pH 7.7 SU Effluent Qualifying Storm Event pH_Field 1371859
Feb 12, 2026 pH 7.38 SU Effluent Qualifying Storm Event pH_Field 1371855
Dec 30, 2025 pH 7.37 SU Effluent Qualifying Storm Event pH_Field 1364744
Dec 26, 2025 pH 7.15 SU Effluent Qualifying Storm Event pH_Field 1364744
Nov 14, 2025 pH 7.52 SU Effluent Qualifying Storm Event pH_Field 1360499
Nov 13, 2025 pH 7.42 SU Effluent Qualifying Storm Event pH_Field 1360499
Mar 13, 2025 pH 7.01 SU Effluent Qualifying Storm Event pH_Field 1329570
Feb 28, 2025 pH 8.26 SU Effluent Qualifying Storm Event pH_Field 1326454
Feb 13, 2025 pH 7.57 SU Effluent Qualifying Storm Event pH_Field 1325014
Feb 13, 2025 pH 7.52 SU Effluent Qualifying Storm Event pH_Field 1325014
Feb 13, 2025 pH 7.69 SU Effluent Qualifying Storm Event pH_Field 1325014
Feb 13, 2025 pH 7.54 SU Effluent Qualifying Storm Event pH_Field 1325014
Dec 27, 2024 pH 7.17 SU Effluent Qualifying Storm Event pH_Field 1319006
Apr 04, 2024 pH 6.52 SU Effluent Qualifying Storm Event pH_Field 1285879
Feb 02, 2024 pH 7.22 SU Effluent Qualifying Storm Event pH_Field 1280651
Feb 01, 2024 pH 7.26 SU Effluent Qualifying Storm Event pH_Field 1280650
Feb 01, 2024 pH 7.5 SU Effluent Qualifying Storm Event pH_Field 1280650
Dec 20, 2023 pH 6.91 SU Effluent Qualifying Storm Event pH_Field 1274631
Dec 20, 2023 pH 6.88 SU Effluent Qualifying Storm Event pH_Field 1274631
Dec 20, 2023 pH 7.12 SU Effluent Qualifying Storm Event pH_Field 1274631
Oct 26, 2023 pH 7.16 SU Effluent Qualifying Storm Event pH_Field 1268298
Feb 24, 2023 pH 7.29 SU Effluent Qualifying Storm Event pH_Field 1232215
Feb 24, 2023 pH 7.15 SU Effluent Qualifying Storm Event pH_Field 1232215
Jan 03, 2023 pH 7.65 SU Effluent Qualifying Storm Event pH_Field 1227126
Jan 03, 2023 pH 7.98 SU Effluent Qualifying Storm Event pH_Field 1227126
Dec 01, 2022 pH 7.51 SU Effluent Qualifying Storm Event pH_Field 1220593
Dec 01, 2022 pH 7.74 SU Effluent Qualifying Storm Event pH_Field 1220593
Nov 08, 2022 pH 7.93 SU Effluent Qualifying Storm Event pH_Field 1216663
Nov 08, 2022 pH 7.48 SU Effluent Qualifying Storm Event pH_Field 1216663
Dec 13, 2021 pH 7.97 SU Effluent Qualifying Storm Event pH_Field 1175867
Dec 13, 2021 pH 7.94 SU Effluent Qualifying Storm Event pH_Field 1175867
Dec 13, 2021 pH 7.78 SU Effluent Qualifying Storm Event pH_Field 1175867
Jan 27, 2021 pH 7 SU Effluent Qualifying Storm Event pH_Paper 1142905
Jan 27, 2021 pH 7 SU Effluent Qualifying Storm Event pH_Paper 1142905
Jan 27, 2021 pH 7 SU Effluent Qualifying Storm Event pH_Paper 1142905
Jan 16, 2020 pH 7.68 SU Effluent Qualifying Storm Event pH_Field 1109600
Jan 16, 2020 pH 7.53 SU Effluent Qualifying Storm Event pH_Field 1109600
Feb 07, 2019 pH 7 SU Effluent Qualifying Storm Event pH_Paper 1044763
Feb 07, 2019 pH 7 SU Effluent Qualifying Storm Event A4500HB 1044763
Nov 29, 2018 pH 7 SU Effluent Qualifying Storm Event pH_Paper 1033861
Mar 16, 2018 pH 7 SU Effluent Qualifying Storm Event pH_Paper 1000004
Feb 15, 2017 pH 7 SU Effluent Qualifying Storm Event pH_Paper 929641
Feb 15, 2017 pH 7 SU Effluent Qualifying Storm Event pH_Paper 929641
Jan 09, 2017 pH 7 SU Effluent Qualifying Storm Event pH_Paper 919980

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.

Compliance and enforcement records by type
Record typeRecordsAs publishedDatesRetrievedList
Violations1 1 Violation · 0 Potential (preliminary) · 0 Dismissed Oct 13, 2025 – Oct 13, 2025 Oct 21, 2026 All violations
Enforcement actions1 1 issued · 0 draft · 0 withdrawn, rescinded or superseded Feb 09, 2026 – Feb 09, 2026 Oct 21, 2026 All actions
Inspections3inspections, not findings Jan 13, 2016 – Oct 13, 2025 Oct 21, 2026 All inspections
Annual reports11certified reports (contents not shown) 2015 – 2025 Oct 21, 2026 All reports
Water-quality-based corrective action reports0reports, 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 (16 records, newest first)
Compliance and enforcement records, newest first
DateRecordIDType or purposeStatus as publishedDetail
Jul 13, 2026 Annual reports 1333952 Annual report 2025 —
Feb 09, 2026 Enforcement actions 468779 NOV (Notice of Violation) Active
Oct 13, 2025 Inspections 2069800 Non-compliance Follow-up FinalizedAdditional Info Required
Oct 13, 2025 Violations 903246 Deficient Report ViolationInspection
Jul 10, 2025 Annual reports 1292715 Annual report 2024 —
Jul 09, 2024 Annual reports 1241705 Annual report 2023 —
Jan 17, 2024 Inspections 2063595 B Type compliance FinalizedAdditional Info Required
Jul 14, 2023 Annual reports 1187624 Annual report 2022 —
Jul 13, 2022 Annual reports 1110866 Annual report 2021 —
Jul 14, 2021 Annual reports 1066788 Annual report 2020 —
Jul 14, 2020 Annual reports 983928 Annual report 2019 —
Jun 29, 2019 Annual reports 951420 Annual report 2018 —
Jul 10, 2018 Annual reports 936826 Annual report 2017 —
Jul 09, 2017 Annual reports 875958 Annual report 2016 —
Jun 30, 2016 Annual reports 844582 Annual report 2015 —
Jan 13, 2016 Inspections 2029783 B Type compliance —Follow-up Inspection Needed

Sources and provenance

Sources behind this page
InformationSourceRetrieved or published
Permit, location, receiving-water textSMARTS Industrial Application Specific DataOct 20, 2026
Permit historySMARTS Storm Water ApplicationsOct 20, 2026
Monitoring resultsSMARTS Industrial Parameter DataOct 20, 2026
Watershed Boundary Dataset HU2 GeoPackages 15, 16, 18 (WBDHU12)USGS2026-10-22
2026 California Integrated Report, Appendix A: 2026 303(d) List (final)SWRCB2026-10-22
Final_2026_Rivers_and_Streams + Final_2026_Lakes_and_Reservoirs (FeatureServer 0)SWRCB GIS2026-10-22
SMARTS TMDL requirementsSMARTS2026-10-21

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

Records are shown as published and are not compliance determinations. How geographic context is derived.