El Dorado County Union Mine Disposal Facility
Active WDID 5S09I000443 El Dorado, El Dorado 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
- El Dorado, El Dorado County
- Region 5S · Central Valley (Sacramento) · Location · Statewide map
- 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
- 284 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Apr 21, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 3 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
- 38.649787, -120.833347
- Precision
- 6 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
- 5700 Union Mine Road, El Dorado 95623
- Regional Water Board
- 5S — Central Valley (Sacramento)
HUC12 watershed Evidence: spatial
- Martinez Creek HUC12 180400130203
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
- County of El Dorado Environemental Management
- Primary industry (SIC)
- 4953-Refuse Systems
- Application ID
- 198394
- NOI processed
- Mar 13, 1992
- Last certified
- Nov 09, 2022
- Facility size
- 237 Acres
- Impervious area
- 2 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 198394 | Industrial | Active | Mar 13, 1992 | — | Nov 09, 2022 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Martinez Creek
- Discharges directly / indirectly
- Y / N (as answered in the permit application)
Evidence: not confirmed Not matchable to a single waterbody
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
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.
284 distinct measurements across 4 parameters, most recent sample Apr 21, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 24 | 4 | 0 | Nov 14, 2025 | Apr 21, 2026 |
| 2024 | 28 | 4 | 0 | Dec 13, 2024 | Feb 13, 2025 |
| 2023 | 20 | 4 | 0 | Dec 20, 2023 | Jan 22, 2024 |
| 2022 | 32 | 4 | 0 | Dec 05, 2022 | Mar 08, 2023 |
| 2021 | 24 | 4 | 0 | Oct 25, 2021 | Apr 21, 2022 |
| 2020 | 16 | 4 | 0 | Jan 04, 2021 | Feb 12, 2021 |
| 2019 | 12 | 4 | 0 | Jan 16, 2020 | Mar 16, 2020 |
| 2018 | 24 | 4 | 0 | Nov 28, 2018 | Feb 27, 2019 |
| 2017 | 32 | 4 | 0 | Nov 16, 2017 | Jan 25, 2018 |
| 2016 | 32 | 4 | 0 | Oct 17, 2016 | Feb 06, 2017 |
| 2015 | 40 | 4 | 0 | Dec 10, 2015 | Mar 04, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Iron, Total | mg/L | 71 | 1 | Dec 10, 2015 | Apr 21, 2026 | Results |
| Oil and Grease | mg/L | 71 | 63 | Dec 10, 2015 | Apr 21, 2026 | Results |
| pH | SU | 71 | 0 | Dec 10, 2015 | Apr 21, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 71 | 15 | Dec 10, 2015 | Apr 21, 2026 | Results |
All results (284 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 21, 2026 | Iron, Total | .15 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1372310 | |
| Apr 21, 2026 | Iron, Total | .15 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1372310 | |
| Apr 21, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1372310 | |
| Apr 21, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1372310 | |
| Apr 21, 2026 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1372310 | |
| Apr 21, 2026 | pH | 7.11 | SU | Effluent | Qualifying Storm Event | pH_Field | 1372310 | |
| Apr 21, 2026 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1372310 | |
| Apr 21, 2026 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1372310 | |
| Dec 17, 2025 | Iron, Total | .14 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361898 | |
| Dec 17, 2025 | Iron, Total | .061 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361898 | |
| Dec 17, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1361898 | |
| Dec 17, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1361898 | |
| Dec 17, 2025 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1361898 | |
| Dec 17, 2025 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1361898 | |
| Dec 17, 2025 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361898 | |
| Dec 17, 2025 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361898 | |
| Nov 14, 2025 | Iron, Total | .6 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1357674 | |
| Nov 14, 2025 | Iron, Total | 2.5 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1357674 | |
| Nov 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1357674 | |
| Nov 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1357674 | |
| Nov 14, 2025 | pH | 7.12 | SU | Effluent | Qualifying Storm Event | pH_Field | 1357674 | |
| Nov 14, 2025 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1357674 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 5.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1357674 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 14 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1357674 | |
| Feb 13, 2025 | Iron, Total | .79 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1322852 | |
| Feb 13, 2025 | Iron, Total | 1.4 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1322852 | |
| Feb 13, 2025 | Oil and Grease | 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1322852 | |
| Feb 13, 2025 | Oil and Grease | .9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1322852 | |
| Feb 13, 2025 | pH | 7.05 | SU | Effluent | Qualifying Storm Event | pH_Field | 1322852 | |
| Feb 13, 2025 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1322852 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 18 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1322852 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 43 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1322852 | |
| Feb 04, 2025 | Iron, Total | .72 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1320409 | |
| Feb 04, 2025 | Iron, Total | .56 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1320409 | |
| Feb 04, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1320409 | |
| Feb 04, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1320409 | |
| Feb 04, 2025 | pH | 7.15 | SU | Effluent | Qualifying Storm Event | pH_Field | 1320409 | |
| Feb 04, 2025 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1320409 | |
| Feb 04, 2025 | Total Suspended Solids (TSS) | 9.1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1320409 | |
| Feb 04, 2025 | Total Suspended Solids (TSS) | 8.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1320409 | |
| Dec 27, 2024 | Iron, Total | .36 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1317882 | |
| Dec 27, 2024 | Iron, Total | .32 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1317882 | |
| Dec 27, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1317882 | |
| Dec 27, 2024 | Oil and Grease | .9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1317882 | |
| Dec 27, 2024 | pH | 6.94 | SU | Effluent | Qualifying Storm Event | pH_Field | 1317882 | |
| Dec 27, 2024 | pH | 7.02 | SU | Effluent | Qualifying Storm Event | pH_Field | 1317882 | |
| Dec 27, 2024 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1317882 | |
| Dec 27, 2024 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1317882 | |
| Dec 13, 2024 | Iron, Total | .42 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1317111 | |
| Dec 13, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1317111 |
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 | 3 Violation · 0 Potential (preliminary) · 0 Dismissed | Nov 03, 2004 – Oct 14, 2010 | Oct 21, 2026 | All violations |
| Enforcement actions | 3 | 3 issued · 0 draft · 0 withdrawn, rescinded or superseded | Dec 01, 2004 – Oct 14, 2010 | Oct 21, 2026 | All actions |
| Inspections | 3 | inspections, not findings | Nov 03, 2004 – Oct 10, 2007 | 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 (20 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 06, 2026 | Annual reports | 1334586 | Annual report 2025 | — | |
| Jul 09, 2025 | Annual reports | 1293376 | Annual report 2024 | — | |
| Jul 01, 2024 | Annual reports | 1242404 | Annual report 2023 | — | |
| Jul 03, 2023 | Annual reports | 1188364 | Annual report 2022 | — | |
| Jul 05, 2022 | Annual reports | 1111662 | Annual report 2021 | — | |
| Jul 01, 2021 | Annual reports | 1067626 | Annual report 2020 | — | |
| Jul 07, 2020 | Annual reports | 984814 | Annual report 2019 | — | |
| Jul 09, 2019 | Annual reports | 952327 | Annual report 2018 | — | |
| Jul 09, 2018 | Annual reports | 937740 | Annual report 2017 | — | |
| Jul 06, 2017 | Annual reports | 876922 | Annual report 2016 | — | |
| Jun 21, 2016 | Annual reports | 843211 | Annual report 2015 | — | |
| Oct 14, 2010 | Enforcement actions | 403224 | SEL (Staff Enforcement Letter) | Historical | |
| Oct 14, 2010 | Violations | 842951 | Deficient BMP Implementation | Violation | Report |
| Oct 10, 2007 | Inspections | 1211136 | B Type compliance | — | |
| Aug 17, 2006 | Enforcement actions | 316340 | NNC (Notice of Non-Compliance) | Active | |
| Jul 02, 2006 | Violations | 444345 | Late Report | Violation | Report |
| Feb 01, 2005 | Inspections | 337447 | B Type compliance | — | |
| Dec 01, 2004 | Enforcement actions | 253912 | NOV (Notice of Violation) | Historical | |
| Nov 03, 2004 | Inspections | 336549 | B Type compliance | — | |
| Nov 03, 2004 | Violations | 260594 | Deficient BMP Implementation | Violation | Inspection |
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.