Eureka Ready Mix Concrete Co
Active WDID 1 12I017241 Arcata, Humboldt County Region 1 · North Coast
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Arcata, Humboldt County
- Region 1 · North Coast · Location · Statewide map
- Receiving water
- Mad 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
- 1 waterbody; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 122 distinct results, 5 reporting years (2015 to 2019)
- Most recent sample Apr 04, 2020 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 6 inspections · 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
- 40.906565, -124.073573
- Precision
- 6 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
- 4945 Boyd Rd, Arcata 95521
- Regional Water Board
- 1 — North Coast
HUC12 watershed Evidence: spatial
- Mill Creek-Mad River HUC12 180101020408
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
- Eureka Ready Mix Concrete Co
- Primary industry (SIC)
- 3273-Ready-Mixed Concrete
- Application ID
- 178331
- NOI processed
- May 08, 2002
- Last certified
- Sep 18, 2015
- Facility size
- 24 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 178331 | Industrial | Active | May 08, 2002 | — | Sep 18, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Mad 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
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 |
|---|---|---|---|
| Mad River HU, Mad River CAR1091001119980706155140 | 404 m | listed | 6 |
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.
122 distinct measurements across 10 parameters, most recent sample Apr 04, 2020.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2019 | 28 | 7 | 0 | Dec 19, 2019 | Apr 04, 2020 |
| 2018 | 24 | 6 | 0 | Dec 14, 2018 | Apr 05, 2019 |
| 2017 | 22 | 6 | 0 | Dec 20, 2017 | Apr 05, 2018 |
| 2016 | 24 | 6 | 0 | Nov 15, 2016 | Apr 07, 2017 |
| 2015 | 24 | 6 | 0 | Dec 03, 2015 | Apr 14, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 20 | 11 | Dec 03, 2015 | Apr 04, 2020 | Results |
| pH | SU | 20 | 0 | Dec 03, 2015 | Apr 04, 2020 | Results |
| Total Suspended Solids (TSS) | mg/L | 20 | 0 | Dec 03, 2015 | Apr 04, 2020 | Results |
| Iron, Total Recoverable | ug/L | 16 | 0 | Dec 03, 2015 | Apr 05, 2019 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 16 | 0 | Dec 03, 2015 | Apr 05, 2019 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 10 | 0 | Dec 03, 2015 | Jan 18, 2018 | Results |
| Chemical Oxygen Demand (COD) | mg/L | 8 | 0 | Dec 14, 2018 | Apr 04, 2020 | Results |
| Iron, Total | mg/L | 4 | 0 | Dec 19, 2019 | Apr 04, 2020 | Results |
| Nitrate, Total (as N) | mg/L | 4 | 2 | Dec 19, 2019 | Apr 04, 2020 | Results |
| Nitrite, Total (as N) | mg/L | 4 | 4 | Dec 19, 2019 | Apr 04, 2020 | Results |
All results (122 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 04, 2020 | Chemical Oxygen Demand (COD) | 7.4 | mg/L | Effluent | Qualifying Storm Event | H8000 | 1106368 | |
| Apr 04, 2020 | Iron, Total | 7.1 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1106368 | |
| Apr 04, 2020 | Nitrate, Total (as N) | DNQ .098 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1106368 | |
| Apr 04, 2020 | Nitrite, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1106368 | |
| Apr 04, 2020 | Oil and Grease | 5.1 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1106368 | |
| Apr 04, 2020 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1106368 | |
| Apr 04, 2020 | Total Suspended Solids (TSS) | 23 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1106368 | |
| Mar 14, 2020 | Chemical Oxygen Demand (COD) | 37 | mg/L | Effluent | Qualifying Storm Event | H8000 | 1103251 | |
| Mar 14, 2020 | Iron, Total | 8.2 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1103251 | |
| Mar 14, 2020 | Nitrate, Total (as N) | .71 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1103251 | |
| Mar 14, 2020 | Nitrite, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1103251 | |
| Mar 14, 2020 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1103251 | |
| Mar 14, 2020 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1103251 | |
| Mar 14, 2020 | Total Suspended Solids (TSS) | 60 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1103251 | |
| Jan 08, 2020 | Chemical Oxygen Demand (COD) | 16 | mg/L | Effluent | Qualifying Storm Event | H8000 | 1098645 | |
| Jan 08, 2020 | Iron, Total | 10 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1098645 | |
| Jan 08, 2020 | Nitrate, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1098645 | |
| Jan 08, 2020 | Nitrite, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1098645 | |
| Jan 08, 2020 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1098645 | |
| Jan 08, 2020 | pH | 7.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1098645 | |
| Jan 08, 2020 | Total Suspended Solids (TSS) | 29 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1098645 | |
| Dec 19, 2019 | Chemical Oxygen Demand (COD) | 23 | mg/L | Effluent | Qualifying Storm Event | H8000 | 1098384 | |
| Dec 19, 2019 | Iron, Total | 9.1 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1098384 | |
| Dec 19, 2019 | Nitrate, Total (as N) | .16 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1098384 | |
| Dec 19, 2019 | Nitrite, Total (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1098384 | |
| Dec 19, 2019 | Oil and Grease | 7.8 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1098384 | |
| Dec 19, 2019 | pH | 8.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1098384 | |
| Dec 19, 2019 | Total Suspended Solids (TSS) | 150 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1098384 | |
| Apr 05, 2019 | Chemical Oxygen Demand (COD) | 44 | mg/L | Effluent | Qualifying Storm Event | H8000 | 1057446 | |
| Apr 05, 2019 | Iron, Total Recoverable | 23000 | ug/L | Effluent | Qualifying Storm Event | E200.7 | 1057446 | |
| Apr 05, 2019 | Nitrite Plus Nitrate (as N) | .24 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1057446 | |
| Apr 05, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1057446 | |
| Apr 05, 2019 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1057446 | |
| Apr 05, 2019 | Total Suspended Solids (TSS) | 280 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1057446 | |
| Mar 27, 2019 | Chemical Oxygen Demand (COD) | 17 | mg/L | Effluent | Qualifying Storm Event | H8000 | 1057440 | |
| Mar 27, 2019 | Iron, Total Recoverable | 5100 | ug/L | Effluent | Qualifying Storm Event | E200.7 | 1057440 | |
| Mar 27, 2019 | Nitrite Plus Nitrate (as N) | .066 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1057440 | |
| Mar 27, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1057440 | |
| Mar 27, 2019 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1057440 | |
| Mar 27, 2019 | Total Suspended Solids (TSS) | 66 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1057440 | |
| Dec 24, 2018 | Chemical Oxygen Demand (COD) | 44 | mg/L | Effluent | Qualifying Storm Event | H8000 | 1039380 | |
| Dec 24, 2018 | Iron, Total Recoverable | 19000 | ug/L | Effluent | Qualifying Storm Event | E200.7 | 1039380 | |
| Dec 24, 2018 | Nitrite Plus Nitrate (as N) | .43 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1039380 | |
| Dec 24, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1039380 | |
| Dec 24, 2018 | pH | 8.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1039380 | |
| Dec 24, 2018 | Total Suspended Solids (TSS) | 260 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1039380 | |
| Dec 14, 2018 | Chemical Oxygen Demand (COD) | 58 | mg/L | Effluent | Qualifying Storm Event | H8000 | 1039374 | |
| Dec 14, 2018 | Iron, Total Recoverable | 15000 | ug/L | Effluent | Qualifying Storm Event | E200.7 | 1039374 | |
| Dec 14, 2018 | Nitrite Plus Nitrate (as N) | .17 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1039374 | |
| Dec 14, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1039374 |
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 | 6 | inspections, not findings | Sep 19, 2007 – Mar 03, 2026 | Oct 21, 2026 | All inspections |
| 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 | 1335487 | Annual report 2025 | — | |
| Mar 03, 2026 | Inspections | 2070697 | B Type compliance | Finalized | Additional Info Required |
| Jul 02, 2025 | Annual reports | 1294308 | Annual report 2024 | — | |
| Jul 11, 2024 | Annual reports | 1243396 | Annual report 2023 | — | |
| Jul 17, 2023 | Annual reports | 1189403 | Annual report 2022 | — | |
| Jul 08, 2022 | Annual reports | 1112792 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1068806 | Annual report 2020 | — | |
| Jul 14, 2020 | Annual reports | 986075 | Annual report 2019 | — | |
| Jul 12, 2019 | Inspections | 2043989 | A Type compliance | — | Follow-up Inspection Needed |
| Jul 11, 2018 | Annual reports | 939054 | Annual report 2017 | — | |
| Jun 23, 2017 | Annual reports | 878303 | Annual report 2016 | — | |
| Jul 06, 2016 | Annual reports | 838783 | Annual report 2015 | — | |
| Dec 02, 2015 | Inspections | 2027753 | B Type compliance | — | No Further Action |
| Oct 10, 2013 | Inspections | 2020010 | B Type compliance | — | No Further Action |
| Oct 16, 2012 | Inspections | 2017094 | B Type compliance | — | No Further Action |
| Sep 19, 2007 | Inspections | 1230207 | 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.