Willis Construction
Active WDID 3 35I009103 San Juan Bautista, 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
- San Juan Bautista, San Benito County
- Region 3 · Central Coast · Location · Statewide map
- Receiving water
- San Benito 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
- 3 waterbodies; 2 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 222 distinct results, 10 reporting years (2015 to 2025)
- Most recent sample Feb 19, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 0 inspections · 3 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
- 36.87526, -121.55428
- 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
- 2261 San Juan Hwy, San Juan Bautista 95045
- Regional Water Board
- 3 — Central Coast
HUC12 watershed Evidence: spatial
- San Juan Canyon HUC12 180600020704
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
- Willis Construction Co
- Primary industry (SIC)
- 3272-Concrete Products, Except Block and Brick
- Application ID
- 185296
- NOI processed
- Nov 07, 1992
- Last certified
- Jul 08, 2020
- Facility size
- 25 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 185296 | Industrial | Active | Nov 07, 1992 | — | Jul 08, 2020 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- San Benito River
- Discharges directly / indirectly
- N / Y (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)
- C3 facility HUC12 not corroborated (complete published list)
1 official waterbody shares 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 |
|---|---|---|---|
| San Benito River CAR3053002019981207091641 | 498 m | listed | 10 |
| San Juan Creek (San Benito County) CAR3052005020090204001958 | 505 m | listed | 7 |
| San Juan Creek, West Branch (San Benito County) CAR3052004120110825145410 | 632 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.
222 distinct measurements across 10 parameters, most recent sample Feb 19, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 24 | 6 | 0 | Nov 13, 2025 | Feb 19, 2026 |
| 2024 | 24 | 6 | 0 | Nov 25, 2024 | Mar 05, 2025 |
| 2023 | 24 | 6 | 0 | Dec 20, 2023 | Jan 24, 2024 |
| 2022 | 36 | 6 | 0 | Dec 01, 2022 | Dec 20, 2023 |
| 2021 | 28 | 9 | 0 | Dec 14, 2021 | Dec 10, 2022 |
| 2020 | 14 | 8 | 0 | Jan 27, 2021 | Mar 18, 2021 |
| 2019 | 24 | 4 | 0 | Dec 02, 2019 | Apr 05, 2020 |
| 2017 | 12 | 4 | 0 | Jan 08, 2018 | Jan 08, 2018 |
| 2016 | 24 | 4 | 0 | Oct 28, 2016 | Jan 18, 2017 |
| 2015 | 12 | 4 | 0 | Jan 05, 2016 | Jan 05, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Iron, Total | mg/L | 42 | 3 | Jan 05, 2016 | Feb 19, 2026 | Results |
| Oil and Grease | mg/L | 42 | 26 | Jan 05, 2016 | Feb 19, 2026 | Results |
| pH | SU | 42 | 0 | Jan 05, 2016 | Feb 19, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 42 | 13 | Jan 05, 2016 | Feb 19, 2026 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 23 | 0 | Jan 27, 2021 | Feb 19, 2026 | Results |
| Turbidity | NTU | 23 | 0 | Jan 27, 2021 | Feb 19, 2026 | Results |
| Boron, Total | ug/L | 4 | 0 | Jan 27, 2021 | Dec 23, 2021 | Results |
| Dissolved Oxygen | mg/L | 2 | 0 | Jan 27, 2021 | Mar 18, 2021 | Results |
| E.coli | MPN/100 mL | 1 | 0 | Dec 14, 2021 | Dec 14, 2021 | Results |
| Total Coliform | MPN/100 mL | 1 | 0 | Dec 14, 2021 | Dec 14, 2021 | Results |
All results (222 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 19, 2026 | Electrical Conductivity @ 25 Deg. C | 180 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1370271 | |
| Feb 19, 2026 | Iron, Total | 1.7 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1370271 | |
| Feb 19, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1370271 | |
| Feb 19, 2026 | pH | 8.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370271 | |
| Feb 19, 2026 | Total Suspended Solids (TSS) | 28 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370271 | |
| Feb 19, 2026 | Turbidity | 39 | NTU | Effluent | Qualifying Storm Event | A2130B | 1370271 | |
| Feb 16, 2026 | Electrical Conductivity @ 25 Deg. C | 34 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1368286 | |
| Feb 16, 2026 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1368286 | |
| Feb 16, 2026 | Oil and Grease | 2 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1368286 | |
| Feb 16, 2026 | pH | 7.74 | SU | Effluent | Qualifying Storm Event | pH_Field | 1368286 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1368286 | |
| Feb 16, 2026 | Turbidity | .87 | NTU | Effluent | Qualifying Storm Event | A2130B | 1368286 | |
| Dec 31, 2025 | Electrical Conductivity @ 25 Deg. C | 62 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1365397 | |
| Dec 31, 2025 | Iron, Total | .017 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1365397 | |
| Dec 31, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1365397 | |
| Dec 31, 2025 | pH | 7.14 | SU | Effluent | Qualifying Storm Event | pH_Field | 1365397 | |
| Dec 31, 2025 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365397 | |
| Dec 31, 2025 | Turbidity | 1 | NTU | Effluent | Qualifying Storm Event | A2130B | 1365397 | |
| Nov 13, 2025 | Electrical Conductivity @ 25 Deg. C | 38 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1360330 | |
| Nov 13, 2025 | Iron, Total | .026 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1360330 | |
| Nov 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1360330 | |
| Nov 13, 2025 | pH | 7.37 | SU | Effluent | Qualifying Storm Event | pH_Field | 1360330 | |
| Nov 13, 2025 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1360330 | |
| Nov 13, 2025 | Turbidity | 1.7 | NTU | Effluent | Qualifying Storm Event | A2130B | 1360330 | |
| Mar 05, 2025 | Electrical Conductivity @ 25 Deg. C | 56 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1331793 | |
| Mar 05, 2025 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1331793 | |
| Mar 05, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1331793 | |
| Mar 05, 2025 | pH | 7.24 | SU | Effluent | Qualifying Storm Event | pH_Field | 1331793 | |
| Mar 05, 2025 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1331793 | |
| Mar 05, 2025 | Turbidity | .98 | NTU | Effluent | Qualifying Storm Event | A2130B | 1331793 | |
| Feb 06, 2025 | Electrical Conductivity @ 25 Deg. C | 29 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1322060 | |
| Feb 06, 2025 | Iron, Total | .038 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1322060 | |
| Feb 06, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1322060 | |
| Feb 06, 2025 | pH | 7.36 | SU | Effluent | Qualifying Storm Event | pH_Field | 1322060 | |
| Feb 06, 2025 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1322060 | |
| Feb 06, 2025 | Turbidity | 2.1 | NTU | Effluent | Qualifying Storm Event | A2130B | 1322060 | |
| Dec 24, 2024 | Electrical Conductivity @ 25 Deg. C | 45 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1319265 | |
| Dec 24, 2024 | Iron, Total | .029 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1319265 | |
| Dec 24, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1319265 | |
| Dec 24, 2024 | pH | 7.35 | SU | Effluent | Qualifying Storm Event | pH_Field | 1319265 | |
| Dec 24, 2024 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1319265 | |
| Dec 24, 2024 | Turbidity | 1.7 | NTU | Effluent | Qualifying Storm Event | A2130B | 1319265 | |
| Nov 25, 2024 | Electrical Conductivity @ 25 Deg. C | 37 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1316442 | |
| Nov 25, 2024 | Iron, Total | .079 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1316442 | |
| Nov 25, 2024 | Oil and Grease | 4.2 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1316442 | |
| Nov 25, 2024 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1316442 | |
| Nov 25, 2024 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1316442 | |
| Nov 25, 2024 | Turbidity | 2.5 | NTU | Effluent | Qualifying Storm Event | A2130B | 1316442 | |
| Jan 24, 2024 | Electrical Conductivity @ 25 Deg. C | 25 | umhos/cm | Effluent | Qualifying Storm Event | A2510B | 1277195 | |
| Jan 24, 2024 | Iron, Total | .051 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1277195 |
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 | 3 | 2 Violation · 0 Potential (preliminary) · 1 Dismissed | Jul 17, 2017 – Jul 16, 2019 | Oct 21, 2026 | All violations |
| Enforcement actions | 3 | 3 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 23, 2017 – Sep 27, 2019 | Oct 21, 2026 | All actions |
| Inspections | 0 | inspections, not findings | — | Oct 21, 2026 | |
| Annual reports | 10 | 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 (16 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 14, 2026 | Annual reports | 1336652 | Annual report 2025 | — | |
| Jul 08, 2025 | Annual reports | 1295523 | Annual report 2024 | — | |
| Jul 12, 2024 | Annual reports | 1244672 | Annual report 2023 | — | |
| Jul 13, 2023 | Annual reports | 1190741 | Annual report 2022 | — | |
| Jun 29, 2022 | Annual reports | 1114240 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1070317 | Annual report 2020 | — | |
| Jul 14, 2020 | Annual reports | 987697 | Annual report 2019 | — | |
| Feb 18, 2020 | Annual reports | 846693 | Annual report 2015 | — | |
| Feb 18, 2020 | Annual reports | 880085 | Annual report 2016 | — | |
| Feb 18, 2020 | Annual reports | 955316 | Annual report 2018 | — | |
| Sep 27, 2019 | Enforcement actions | 434194 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 16, 2019 | Violations | 871083 | Late Report | Violation | Report |
| Aug 17, 2018 | Enforcement actions | 430230 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 16, 2018 | Violations | 867313 | Late Report | Violation | Report |
| Aug 23, 2017 | Enforcement actions | 426870 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 17, 2017 | Violations | 864068 | Late Report | Dismissed | Report |
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.