Kie Con Inc
Active WDID 5S07I022822 Antioch, Contra Costa County Region 5S · Central Valley (Sacramento)
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Antioch, Contra Costa County
- Region 5S · Central Valley (Sacramento) · Location · Statewide map
- Receiving water
- San Joaquin 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
- None
- Monitoring results Evidence: facility-reported
- 142 distinct results, 9 reporting years (2015 to 2025)
- Most recent sample Apr 01, 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
- 38.01226, -121.7547
- Precision
- 4 decimal places
- Shared point
- 2 permits report this exact point
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 3551 Wilbur Ave, Antioch 94509
- Regional Water Board
- 5S — Central Valley (Sacramento)
HUC12 watershed Evidence: spatial
- Markley Canyon-San Joaquin River HUC12 180400030907
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
- Kie Con Inc
- Primary industry (SIC)
- 3272-Concrete Products, Except Block and Brick
- Application ID
- 407270
- NOI processed
- Sep 14, 2010
- Last certified
- Jul 31, 2025
- Facility size
- 38 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 407270 | Industrial | Active | Sep 14, 2010 | — | Jul 31, 2025 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- San Joaquin River
- Discharges directly / indirectly
- N / 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
11 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.
No 2026 Integrated Report waterbody lies within the proximity threshold of the reported location.
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.
142 distinct measurements across 5 parameters, most recent sample Apr 01, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 4 | 4 | 0 | Apr 01, 2026 | Apr 01, 2026 |
| 2024 | 16 | 4 | 0 | Feb 05, 2025 | Mar 12, 2025 |
| 2023 | 20 | 4 | 0 | Jan 19, 2024 | Apr 12, 2024 |
| 2022 | 42 | 4 | 0 | Jan 04, 2023 | May 17, 2023 |
| 2021 | 16 | 4 | 0 | Dec 16, 2021 | Jun 08, 2022 |
| 2018 | 9 | 5 | 0 | Jan 17, 2019 | Feb 04, 2019 |
| 2017 | 12 | 4 | 0 | Jan 25, 2018 | Apr 06, 2018 |
| 2016 | 14 | 5 | 0 | Jan 03, 2017 | Feb 17, 2017 |
| 2015 | 9 | 5 | 0 | Jan 18, 2016 | Mar 07, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Iron, Total | mg/L | 35 | 0 | Jan 18, 2016 | Apr 01, 2026 | Results |
| pH | SU | 34 | 1 | Jan 18, 2016 | Apr 01, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 34 | 1 | Jan 18, 2016 | Apr 01, 2026 | Results |
| Oil and Grease | mg/L | 33 | 33 | Mar 07, 2016 | Apr 01, 2026 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 6 | 0 | Jan 18, 2016 | Jan 17, 2019 | Results |
All results (142 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 01, 2026 | Iron, Total | .146 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1371778 | |
| Apr 01, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1371778 | |
| Apr 01, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1371778 | |
| Apr 01, 2026 | Total Suspended Solids (TSS) | 8.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1371778 | |
| Mar 12, 2025 | Iron, Total | .299 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1327926 | |
| Mar 12, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327926 | |
| Mar 12, 2025 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1327926 | |
| Mar 12, 2025 | Total Suspended Solids (TSS) | 6.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327926 | |
| Mar 05, 2025 | Iron, Total | .306 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1324163 | |
| Mar 05, 2025 | Oil and Grease | ND 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1324163 | |
| Mar 05, 2025 | pH | 8.9 | SU | Effluent | Qualifying Storm Event | A4500HB | 1324163 | |
| Mar 05, 2025 | Total Suspended Solids (TSS) | 3.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324163 | |
| Feb 13, 2025 | Iron, Total | 1.61 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1324071 | |
| Feb 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1324071 | |
| Feb 13, 2025 | pH | DNQ 7.84 | SU | Effluent | Qualifying Storm Event | A4500HB | 1324071 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 5.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324071 | |
| Feb 05, 2025 | Iron, Total | 1.31 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1324162 | |
| Feb 05, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1324162 | |
| Feb 05, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | A4500HB | 1324162 | |
| Feb 05, 2025 | Total Suspended Solids (TSS) | 6.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324162 | |
| Apr 12, 2024 | Iron, Total | .285 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1285677 | |
| Apr 12, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1285677 | |
| Apr 12, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1285677 | |
| Apr 12, 2024 | Total Suspended Solids (TSS) | 10 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1285677 | |
| Apr 04, 2024 | Iron, Total | .425 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1284149 | |
| Apr 04, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1284149 | |
| Apr 04, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1284149 | |
| Apr 04, 2024 | Total Suspended Solids (TSS) | 7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1284149 | |
| Mar 29, 2024 | Iron, Total | .517 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1283352 | |
| Mar 29, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1283352 | |
| Mar 29, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1283352 | |
| Mar 29, 2024 | Total Suspended Solids (TSS) | 9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1283352 | |
| Feb 01, 2024 | Iron, Total | 2.65 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1278913 | |
| Feb 01, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1278913 | |
| Feb 01, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1278913 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 22.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1278913 | |
| Jan 19, 2024 | Iron, Total | .955 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1274462 | |
| Jan 19, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1274462 | |
| Jan 19, 2024 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1274462 | |
| Jan 19, 2024 | Total Suspended Solids (TSS) | 8.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1274462 | |
| May 17, 2023 | Iron, Total | .142 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1236654 | |
| May 17, 2023 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1236654 | |
| May 05, 2023 | Iron, Total | .544 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1236650 | |
| May 05, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1236650 | |
| May 05, 2023 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1236650 | |
| May 05, 2023 | Total Suspended Solids (TSS) | 8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1236650 | |
| Apr 18, 2023 | Iron, Total | .941 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1235653 | |
| Apr 18, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1235653 | |
| Apr 18, 2023 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1235653 | |
| Apr 18, 2023 | Total Suspended Solids (TSS) | 4.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1235653 |
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 | Sep 01, 2015 – Sep 01, 2015 | 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 |
|---|---|---|---|---|---|
| Jul 20, 2026 | Annual reports | 1337695 | Annual report 2025 | — | |
| Jul 13, 2025 | Annual reports | 1296619 | Annual report 2024 | — | |
| Jul 05, 2024 | Annual reports | 1245838 | Annual report 2023 | — | |
| Jul 05, 2023 | Annual reports | 1191966 | Annual report 2022 | — | |
| Jul 07, 2022 | Annual reports | 1115583 | Annual report 2021 | — | |
| Jul 13, 2021 | Annual reports | 1063688 | Annual report 2020 | — | |
| Jul 13, 2020 | Annual reports | 980604 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 956877 | Annual report 2018 | — | |
| Sep 11, 2018 | Annual reports | 881762 | Annual report 2016 | — | |
| Jun 25, 2018 | Annual reports | 942309 | Annual report 2017 | — | |
| Jul 13, 2016 | Annual reports | 840711 | Annual report 2015 | — | |
| Sep 01, 2015 | Inspections | 2027469 | B Type compliance | — | No Further Action |
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.