Free Builders Supply Incorporated
Active WDID 9 37I026525 San Marcos, San Diego County Region 9 · San Diego
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- San Marcos, San Diego County
- Region 9 · San Diego · Location · Statewide map
- Receiving water
- San Marcos Creek (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
- 1 waterbody; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 105 distinct results, 7 reporting years (2015 to 2021)
- Most recent sample Mar 28, 2022 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 2 inspections · 7 violation records · 2 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
- 33.1401, -117.19943
- 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
- 1530 Linda Vista Drive, San Marcos 92078
- Regional Water Board
- 9 — San Diego
HUC12 watershed Evidence: spatial
- San Marcos Creek HUC12 180703030503
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
- Free Builders Supply Incorporated
- Primary industry (SIC)
- 3449-Miscellaneous Structural Metal Work
- Secondary SIC
- 3281-Cut Stone and Stone Products
- Application ID
- 471011
- NOI processed
- Apr 08, 2016
- Last certified
- Apr 07, 2016
- Facility size
- 3.72 Acres
- Impervious area
- 98.6 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 471011 | Industrial | Active | Apr 08, 2016 | — | Apr 07, 2016 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- San Marcos Creek
- Discharges directly / indirectly
- Y / N (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)
- C1 name is only a prefix of official names
3 official waterbodies share 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 Marcos Creek, Upper (above San Marcos Lake) CAR9045200020200514036006 | 982 m | listed | 9 |
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.
105 distinct measurements across 7 parameters, most recent sample Mar 28, 2022.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2021 | 7 | 7 | 0 | Mar 28, 2022 | Mar 28, 2022 |
| 2020 | 21 | 7 | 0 | Oct 28, 2020 | Mar 11, 2021 |
| 2019 | 28 | 7 | 0 | Dec 06, 2019 | Apr 20, 2020 |
| 2018 | 7 | 7 | 0 | May 16, 2019 | May 16, 2019 |
| 2017 | 14 | 7 | 0 | Jan 09, 2018 | Feb 27, 2018 |
| 2016 | 14 | 7 | 0 | Feb 27, 2017 | Feb 27, 2017 |
| 2015 | 14 | 7 | 0 | Apr 07, 2016 | May 06, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Aluminum, Total | mg/L | 15 | 0 | Apr 07, 2016 | Mar 28, 2022 | Results |
| Iron, Total | mg/L | 15 | 0 | Apr 07, 2016 | Mar 28, 2022 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 15 | 0 | Apr 07, 2016 | Mar 28, 2022 | Results |
| Oil and Grease | mg/L | 15 | 7 | Apr 07, 2016 | Mar 28, 2022 | Results |
| pH | SU | 15 | 0 | Apr 07, 2016 | Mar 28, 2022 | Results |
| Total Suspended Solids (TSS) | mg/L | 15 | 0 | Apr 07, 2016 | Mar 28, 2022 | Results |
| Zinc, Total | mg/L | 15 | 0 | Apr 07, 2016 | Mar 28, 2022 | Results |
All results (105 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Mar 28, 2022 | Aluminum, Total | 2.4 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1181153 | |
| Mar 28, 2022 | Iron, Total | 2.8 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1181153 | |
| Mar 28, 2022 | Nitrite Plus Nitrate (as N) | 2.2 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1181153 | |
| Mar 28, 2022 | Oil and Grease | 17 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1181153 | |
| Mar 28, 2022 | pH | 9.73 | SU | Effluent | Qualifying Storm Event | pH_Field | 1181153 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | 51 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1181153 | |
| Mar 28, 2022 | Zinc, Total | .16 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1181153 | |
| Mar 11, 2021 | Aluminum, Total | 1.8 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1150661 | |
| Mar 11, 2021 | Iron, Total | 3 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1150661 | |
| Mar 11, 2021 | Nitrite Plus Nitrate (as N) | .063 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1150661 | |
| Mar 11, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1150661 | |
| Mar 11, 2021 | pH | 9.63 | SU | Effluent | Qualifying Storm Event | pH_Field | 1150661 | |
| Mar 11, 2021 | Total Suspended Solids (TSS) | 32 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1150661 | |
| Mar 11, 2021 | Zinc, Total | .091 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1150661 | |
| Feb 12, 2021 | Aluminum, Total | 9.2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1150660 | |
| Feb 12, 2021 | Iron, Total | 13 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1150660 | |
| Feb 12, 2021 | Nitrite Plus Nitrate (as N) | 1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1150660 | |
| Feb 12, 2021 | Oil and Grease | 2.8 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1150660 | |
| Feb 12, 2021 | pH | 10.11 | SU | Effluent | Qualifying Storm Event | pH_Field | 1150660 | |
| Feb 12, 2021 | Total Suspended Solids (TSS) | 190 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1150660 | |
| Feb 12, 2021 | Zinc, Total | .37 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1150660 | |
| Oct 28, 2020 | Aluminum, Total | 4.4 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144377 | |
| Oct 28, 2020 | Iron, Total | 5.4 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1144377 | |
| Oct 28, 2020 | Nitrite Plus Nitrate (as N) | 2.2 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1144377 | |
| Oct 28, 2020 | Oil and Grease | 4.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1144377 | |
| Oct 28, 2020 | pH | 9.83 | SU | Effluent | Qualifying Storm Event | A4500HB | 1144377 | |
| Oct 28, 2020 | Total Suspended Solids (TSS) | 2.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1144377 | |
| Oct 28, 2020 | Zinc, Total | .2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1144377 | |
| Apr 20, 2020 | Aluminum, Total | 2.1 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1093903 | |
| Apr 20, 2020 | Iron, Total | 3.6 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1093903 | |
| Apr 20, 2020 | Nitrite Plus Nitrate (as N) | .25 | mg/L | Effluent | Qualifying Storm Event | A4500NOH | 1093903 | |
| Apr 20, 2020 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1093903 | |
| Apr 20, 2020 | pH | 9.26 | SU | Effluent | Qualifying Storm Event | A4500HB | 1093903 | |
| Apr 20, 2020 | Total Suspended Solids (TSS) | 37 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1093903 | |
| Apr 20, 2020 | Zinc, Total | .06 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1093903 | |
| Mar 18, 2020 | Aluminum, Total | 11 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1109144 | |
| Mar 18, 2020 | Iron, Total | 17 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1109144 | |
| Mar 18, 2020 | Nitrite Plus Nitrate (as N) | .51 | mg/L | Effluent | Qualifying Storm Event | A4500NOH | 1109144 | |
| Mar 18, 2020 | Oil and Grease | 1.5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1109144 | |
| Mar 18, 2020 | pH | 9.24 | SU | Effluent | Qualifying Storm Event | A4500HB | 1109144 | |
| Mar 18, 2020 | Total Suspended Solids (TSS) | 270 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1109144 | |
| Mar 18, 2020 | Zinc, Total | .33 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1109144 | |
| Dec 23, 2019 | Aluminum, Total | 1.5 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1098466 | |
| Dec 23, 2019 | Iron, Total | 2.2 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1098466 | |
| Dec 23, 2019 | Nitrite Plus Nitrate (as N) | 1.8 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1098466 | |
| Dec 23, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1098466 | |
| Dec 23, 2019 | pH | 9.54 | SU | Effluent | Qualifying Storm Event | pH_Field | 1098466 | |
| Dec 23, 2019 | Total Suspended Solids (TSS) | 29 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1098466 | |
| Dec 23, 2019 | Zinc, Total | .082 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1098466 | |
| Dec 06, 2019 | Aluminum, Total | 6.6 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1093908 |
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 | 7 | 1 Violation · 0 Potential (preliminary) · 6 Dismissed | Jan 01, 2017 – Jan 25, 2019 | Oct 21, 2026 | All violations |
| Enforcement actions | 2 | 2 issued · 0 draft · 0 withdrawn, rescinded or superseded | Feb 28, 2017 – Feb 08, 2019 | Oct 21, 2026 | All actions |
| Inspections | 2 | inspections, not findings | Mar 18, 2016 – Jan 25, 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 (22 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 09, 2026 | Annual reports | 1338809 | Annual report 2025 | — | |
| Jul 11, 2025 | Annual reports | 1297828 | Annual report 2024 | — | |
| Jul 08, 2024 | Annual reports | 1247081 | Annual report 2023 | — | |
| Jul 01, 2023 | Annual reports | 1193269 | Annual report 2022 | — | |
| Mar 03, 2023 | Annual reports | 1117067 | Annual report 2021 | — | |
| Jul 08, 2021 | Annual reports | 1065266 | Annual report 2020 | — | |
| Aug 12, 2020 | Annual reports | 982340 | Annual report 2019 | — | |
| Jul 11, 2019 | Annual reports | 958678 | Annual report 2018 | — | |
| Feb 08, 2019 | Enforcement actions | 432372 | SEL (Staff Enforcement Letter) | Active | |
| Jan 25, 2019 | Inspections | 2041326 | B Type compliance | — | Additional Info Required |
| Jan 25, 2019 | Violations | 869307 | Deficient BMP Implementation | Dismissed | Inspection |
| Jan 25, 2019 | Violations | 869308 | Deficient BMP Implementation | Dismissed | Inspection |
| Jan 25, 2019 | Violations | 869309 | Deficient BMP Implementation | Dismissed | Inspection |
| Jan 25, 2019 | Violations | 869310 | Deficient BMP Implementation | Dismissed | Inspection |
| Jan 25, 2019 | Violations | 869311 | Deficient BMP Implementation | Dismissed | Inspection |
| Jan 25, 2019 | Violations | 869312 | Deficient BMP Implementation | Dismissed | Inspection |
| Jun 27, 2018 | Annual reports | 944116 | Annual report 2017 | — | |
| Jun 28, 2017 | Annual reports | 883591 | Annual report 2016 | — | |
| Feb 28, 2017 | Enforcement actions | 425761 | SEL (Staff Enforcement Letter) | Active | |
| Jan 01, 2017 | Violations | 862741 | Late Report | Violation | Report |
| Jun 27, 2016 | Annual reports | 868813 | Annual report 2015 | — | |
| Mar 18, 2016 | Inspections | 2057710 | Non-Filer/NONA | Performed | 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.