Grass Valley Steelcast
Active WDID 5S29I001179 Grass Valley, Nevada 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
- Grass Valley, Nevada County
- Region 5S · Central Valley (Sacramento) · Location · Statewide map
- Receiving water
- Wolf 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
- 231 distinct results, 9 reporting years (2015 to 2025)
- Most recent sample Apr 21, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 2 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
- 39.219427, -121.060665
- 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
- 145 E Main St, Grass Valley 95945
- Regional Water Board
- 5S — Central Valley (Sacramento)
HUC12 watershed Evidence: spatial
- Rattlesnake Creek-Wolf Creek HUC12 180201260202
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
- Grass Valley Steelcast
- Primary industry (SIC)
- 3325-Steel Foundries, NEC
- Application ID
- 198623
- NOI processed
- Mar 26, 1992
- Last certified
- Jun 19, 2015
- Facility size
- 23601 SqFt
- Impervious area
- 96 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 198623 | Industrial | Active | Mar 26, 1992 | — | Jun 19, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Wolf Creek
- 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)
- 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 |
|---|---|---|---|
| Wolf Creek (Nevada County) CAR5163201020011212113551 | 119 m | listed | 1 |
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.
231 distinct measurements across 11 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 | 28 | 7 | 0 | Nov 13, 2025 | Apr 21, 2026 |
| 2024 | 28 | 7 | 0 | Nov 13, 2024 | Feb 13, 2025 |
| 2023 | 21 | 7 | 0 | Dec 06, 2023 | Jan 03, 2024 |
| 2022 | 28 | 7 | 0 | Dec 01, 2022 | Mar 28, 2023 |
| 2021 | 28 | 7 | 0 | Dec 09, 2021 | Mar 15, 2022 |
| 2018 | 14 | 7 | 0 | Jan 16, 2019 | Jan 16, 2019 |
| 2017 | 28 | 7 | 0 | Jan 08, 2018 | Mar 01, 2018 |
| 2016 | 28 | 7 | 0 | Oct 14, 2016 | Feb 20, 2017 |
| 2015 | 28 | 11 | 0 | Nov 09, 2015 | Apr 22, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 33 | 32 | Nov 09, 2015 | Apr 21, 2026 | Results |
| pH | SU | 33 | 0 | Nov 09, 2015 | Apr 21, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 33 | 3 | Nov 09, 2015 | Apr 21, 2026 | Results |
| Aluminum, Total | mg/L | 31 | 9 | Apr 22, 2016 | Apr 21, 2026 | Results |
| Copper, Total | mg/L | 31 | 5 | Apr 22, 2016 | Apr 21, 2026 | Results |
| Iron, Total | mg/L | 31 | 7 | Apr 22, 2016 | Apr 21, 2026 | Results |
| Zinc, Total | mg/L | 31 | 0 | Apr 22, 2016 | Apr 21, 2026 | Results |
| Aluminum, Total Recoverable | ug/L | 2 | 0 | Nov 09, 2015 | Nov 09, 2015 | Results |
| Copper, Total Recoverable | ug/L | 2 | 0 | Nov 09, 2015 | Nov 09, 2015 | Results |
| Iron, Total Recoverable | ug/L | 2 | 0 | Nov 09, 2015 | Nov 09, 2015 | Results |
| Zinc, Total Recoverable | ug/L | 2 | 0 | Nov 09, 2015 | Nov 09, 2015 | Results |
All results (231 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 21, 2026 | Aluminum, Total | .049 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373093 | |
| Apr 21, 2026 | Aluminum, Total | .107 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373093 | |
| Apr 21, 2026 | Copper, Total | .00153 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373093 | |
| Apr 21, 2026 | Copper, Total | .00193 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373093 | |
| Apr 21, 2026 | Iron, Total | .169 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373093 | |
| Apr 21, 2026 | Iron, Total | .19 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373093 | |
| Apr 21, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1373093 | |
| Apr 21, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1373093 | |
| Apr 21, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1373093 | |
| Apr 21, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1373093 | |
| Apr 21, 2026 | Total Suspended Solids (TSS) | 12.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373093 | |
| Apr 21, 2026 | Total Suspended Solids (TSS) | 11.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373093 | |
| Apr 21, 2026 | Zinc, Total | .129 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373093 | |
| Apr 21, 2026 | Zinc, Total | .0312 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373093 | |
| Nov 13, 2025 | Aluminum, Total | .35 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357197 | |
| Nov 13, 2025 | Aluminum, Total | .54 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357197 | |
| Nov 13, 2025 | Copper, Total | .00718 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357197 | |
| Nov 13, 2025 | Copper, Total | .00525 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357197 | |
| Nov 13, 2025 | Iron, Total | .207 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357197 | |
| Nov 13, 2025 | Iron, Total | .178 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357197 | |
| Nov 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1357197 | |
| Nov 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1357197 | |
| Nov 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1357197 | |
| Nov 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1357197 | |
| Nov 13, 2025 | Total Suspended Solids (TSS) | 8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1357197 | |
| Nov 13, 2025 | Total Suspended Solids (TSS) | 14.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1357197 | |
| Nov 13, 2025 | Zinc, Total | .169 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357197 | |
| Nov 13, 2025 | Zinc, Total | .0912 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357197 | |
| Feb 13, 2025 | Aluminum, Total | .094 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1326586 | |
| Feb 13, 2025 | Aluminum, Total | .2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1326586 | |
| Feb 13, 2025 | Copper, Total | .0019 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1326586 | |
| Feb 13, 2025 | Copper, Total | .0015 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1326586 | |
| Feb 13, 2025 | Iron, Total | .16 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1326586 | |
| Feb 13, 2025 | Iron, Total | .18 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1326586 | |
| Feb 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1326586 | |
| Feb 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1326586 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1326586 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1326586 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 13.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1326586 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 12.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1326586 | |
| Feb 13, 2025 | Zinc, Total | .095 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1326586 | |
| Feb 13, 2025 | Zinc, Total | .04 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1326586 | |
| Nov 13, 2024 | Aluminum, Total | .15 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1316308 | |
| Nov 13, 2024 | Aluminum, Total | .12 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1316308 | |
| Nov 13, 2024 | Copper, Total | .0041 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1316308 | |
| Nov 13, 2024 | Copper, Total | .0035 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1316308 | |
| Nov 13, 2024 | Iron, Total | .38 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1316308 | |
| Nov 13, 2024 | Iron, Total | .16 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1316308 | |
| Nov 13, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1316308 | |
| Nov 13, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1316308 |
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 | 2 | 0 Violation · 2 Potential (preliminary) · 0 Dismissed | Jul 15, 2003 – Oct 15, 2003 | Oct 21, 2026 | All violations |
| Enforcement actions | 0 | 0 issued · 0 draft · 0 withdrawn, rescinded or superseded | — | Oct 21, 2026 | |
| Inspections | 1 | inspections, not findings | Aug 03, 2016 – Aug 03, 2016 | 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 (14 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 14, 2026 | Annual reports | 1334592 | Annual report 2025 | — | |
| Jul 14, 2025 | Annual reports | 1293382 | Annual report 2024 | — | |
| Jul 09, 2024 | Annual reports | 1242410 | Annual report 2023 | — | |
| Jul 07, 2023 | Annual reports | 1188370 | Annual report 2022 | — | |
| Jul 11, 2022 | Annual reports | 1111668 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1067632 | Annual report 2020 | — | |
| Jul 15, 2020 | Annual reports | 984821 | Annual report 2019 | — | |
| Jul 15, 2019 | Annual reports | 952334 | Annual report 2018 | — | |
| Jul 11, 2018 | Annual reports | 937747 | Annual report 2017 | — | |
| Jul 12, 2017 | Annual reports | 876929 | Annual report 2016 | — | |
| Aug 03, 2016 | Inspections | 2030706 | B Type compliance | — | Additional Info Required |
| Jun 15, 2016 | Annual reports | 841872 | Annual report 2015 | — | |
| Oct 15, 2003 | Violations | 244676 | Deficient Report | Potential | Inspection |
| Jul 15, 2003 | Violations | 244674 | Deficient Report | Potential | 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.