Industrial stormwater facility
WDID 1 12I027258 · Notice of Intent · Arcata, Humboldt
SIC 2421 · Sawmills and Planing Mills, General · Regional Board 1 - North Coast Region
Hydrologic
Official facility coordinate plotted against the associated Final 2026 Integrated Report impaired-water geometry.
Geometry shown is limited to waterbodies geographically associated with this facility. Geographic association does not establish a discharge connection, receiving-water connectivity, or causation.
Intelligence summary
What is available for this facility across the connected datasets.
Official
303(d) context
Grouped by derived geographic association class.
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (1) Indicator Bacteria
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (2) Indicator Bacteria, Sediment
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (3) Aluminum, Sediment, Sedimentation/Siltation
Bay & Harbor · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (3) Dioxin compounds (including 2,3,7,8-TCDD), Dioxin Toxic Equivalents, PCBs (Polychlorinated biphenyls)
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (2) Aluminum, Manganese
Associations are calculated from official facility coordinates, USGS HUC12 boundaries, and official 2026 impaired-water geometry. They do not establish a discharge connection or causation.
Water Board-stated TMDL waste load allocations applied to this industrial permit in SMARTS.
No SMARTS TMDL requirement is recorded for this WDID. In the statewide TMDL export only permits in Regions 4, 8 and 9 currently carry industrial TMDL requirements, so an absence here is not a statement that the facility discharges to an unimpaired water.
Official monitoring
Self-reported industrial stormwater sampling results as submitted by the discharger to SMARTS.
Loading reported results…
| Sample date | Location | Parameter | Result | Units | Event |
|---|---|---|---|---|---|
| 2026-04-01 | SW-1 | Chemical oxygen demand (COD) | 61 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-1 | Oil and Grease | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-1 | pH | 7.22 | SU | Qualifying Storm Event |
| 2026-04-01 | SW-1 | Tannin and Lignin | 4.4 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-1 | Total Suspended Solids (TSS) | 24 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-1 | Zinc | .094 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-2 | Chemical oxygen demand (COD) | 100 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-2 | Oil and Grease | 2 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-2 | pH | 7.36 | SU | Qualifying Storm Event |
| 2026-04-01 | SW-2 | Tannin and Lignin | 16 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-2 | Total Suspended Solids (TSS) | 27 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-2 | Zinc | .014 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-3 | Chemical oxygen demand (COD) | 47 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-3 | Oil and Grease | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-3 | pH | 6.87 | SU | Qualifying Storm Event |
| 2026-04-01 | SW-3 | Tannin and Lignin | 9.7 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-3 | Total Suspended Solids (TSS) | 8.6 | mg/L | Qualifying Storm Event |
| 2026-04-01 | SW-3 | Zinc | .27 | mg/L | Qualifying Storm Event |
| 2026-02-08 | SW-1 | Chemical oxygen demand (COD) | 54 | mg/L | Qualifying Storm Event |
| 2026-02-08 | SW-1 | Oil and Grease | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2026-02-08 | SW-1 | pH | 7.51 | SU | Qualifying Storm Event |
| 2026-02-08 | SW-1 | Tannin and Lignin | 6 | mg/L | Qualifying Storm Event |
| 2026-02-08 | SW-1 | Total Suspended Solids (TSS) | 25 | mg/L | Qualifying Storm Event |
| 2026-02-08 | SW-1 | Zinc | .052 | mg/L | Qualifying Storm Event |
| 2026-02-08 | SW-2 | Chemical oxygen demand (COD) | 96 | mg/L | Qualifying Storm Event |
Monitoring rows are official self-reported SMARTS submissions, joined to this facility by WDID. California Stormwater Intelligence does not restate, correct, average or evaluate reported values, and no benchmark comparison or violation determination is made.
YDOS-derived
Reported SMARTS analytical results compared against the Numeric Action Levels of the Industrial General Permit version in effect for each reporting year (July 1 – June 30).
| Parameter | NAL type | Calculated value | NAL | Result | Samples used | Method |
|---|---|---|---|---|---|---|
Chemical Oxygen Demand (COD) cod | Annual | 81 mg/L | 120 mg/L | At or below NALAnnual average of 12 eligible result(s) compared with the annual NAL.0.68× threshold | 12 eligible | arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported) |
Oil and Grease oil_grease | Instantaneous maximum | —0 samples above | 25 mg/L | At or below NALNo eligible result in this reporting year was outside the instantaneous maximum NAL. | 12 eligible10 non-detect as zero | count of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year |
pH ph | Instantaneous maximum | —0 samples above | 6 – 9 pH units | Within NAL rangeNo eligible result in this reporting year was outside the instantaneous maximum NAL. | 12 eligible | count of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year |
Total Suspended Solids (TSS) tss | Instantaneous maximum | —0 samples above | 400 mg/L | At or below NALNo eligible result in this reporting year was outside the instantaneous maximum NAL. | 12 eligible | count of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year |
Zinc, Total zinc_total | Annual | 0.117 mg/L | 0.26 mg/L | At or below NALAnnual average of 12 eligible result(s) compared with the annual NAL.0.45× threshold | 12 eligible | arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported) |
An NAL exceedance is a permit-defined condition that triggers Exceedance Response Actions under the Industrial General Permit. It is not a violation, an enforcement action, or a Water Board compliance determination. Annual values use the arithmetic average of eligible results with non-detects treated as zero; instantaneous maximum NALs (total suspended solids, oil and grease, pH) are exceeded when two or more eligible results in a reporting year fall outside the level. Rules transcribed from 2014-0057-DWQ as amended by 2015-0122-DWQ ↗ (effective 2015-07-01, superseded 2020-06-30); 2014-0057-DWQ as amended by 2018-0028-DWQ ↗ (effective 2020-07-01).
Documents
Attachment inventory recorded in the State Water Board SMARTS public attachment workflow for this permit.
Metadata indicators
DerivedDocument indicators are YDOS-derived counts and dates calculated from SMARTS attachment metadata. They describe what is on file, not whether a facility complied with any requirement.
99 substantive of 154 indexed attachments
Amended SWPPP
Source file type SWPPP · part 1/1 · 2018-06-27 · 5.9 MB
Log Deck Map
Source file type Facility/Site Map · part 1/1 · 2017-07-13 · 194 KB
Mill Site Map
Source file type Facility/Site Map · part 1/1 · 2017-07-13 · 421 KB
MRL Industrial SWPPP
Source file type SWPPP · part 1/1 · 2017-07-13 · 6.1 MB
Submitted report pdf
Source file type Submitted Report PDF · 2026-07-20 · 1.0 MB
Submitted report pdf
Source file type Submitted Report PDF · 2026-06-01 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2026-02-25 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2026-01-26 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2025-12-09 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2025-06-30 · 999 KB
Submitted report pdf
Source file type Submitted Report PDF · 2025-04-15 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2025-02-25 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2025-02-25 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2024-06-24 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2024-06-24 · 999 KB
Submitted report pdf
Source file type Submitted Report PDF · 2024-03-27 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2024-03-27 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2024-03-27 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2023-07-31 · 999 KB
Submitted report pdf
Source file type Submitted Report PDF · 2023-07-21 · 999 KB
Submitted report pdf
Source file type Submitted Report PDF · 2023-04-27 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2023-04-27 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2023-04-27 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2023-04-27 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2023-02-23 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2023-02-23 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2022-12-29 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2022-07-14 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2022-07-14 · 1004 KB
Submitted report pdf
Source file type Submitted Report PDF · 2022-04-06 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2022-01-17 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2022-01-06 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2021-07-15 · 1003 KB
Submitted report pdf
Source file type Submitted Report PDF · 2021-06-08 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2021-06-08 · 407 KB
Submitted report pdf
Source file type Submitted Report PDF · 2021-03-19 · 106 KB
Submitted report pdf
Source file type Submitted Report PDF · 2021-03-19 · 106 KB
Submitted report pdf
Source file type Submitted Report PDF · 2020-06-29 · 106 KB
Submitted report pdf
Source file type Submitted Report PDF · 2020-06-29 · 1000 KB
Submitted report pdf
Source file type Submitted Report PDF · 2020-06-22 · 106 KB
Submitted report pdf
Source file type Submitted Report PDF · 2020-06-22 · 106 KB
Submitted report pdf
Source file type Submitted Report PDF · 2020-01-28 · 106 KB
Submitted report pdf
Source file type Submitted Report PDF · 2019-05-30 · 106 KB
Submitted report pdf
Source file type Submitted Report PDF · 2019-05-29 · 106 KB
Submitted report pdf
Source file type Submitted Report PDF · 2019-05-29 · 105 KB
Submitted report pdf
Source file type Submitted Report PDF · 2019-05-29 · 106 KB
Submitted report pdf
Source file type Submitted Report PDF · 2018-06-28 · 911 KB
Submitted report pdf
Source file type Submitted Report PDF · 2018-02-09 · 406 KB
Submitted report pdf
Source file type Submitted Report PDF · 2018-02-09 · 403 KB
Level 2 Technical Report
Source file type Level 2 Technical Report · part 1/1 · 2022-12-29 · 616 KB
Combined Level 1 Exceedance Response Action Report & Level 2 Exceedance Report Action Plan
Source file type Level 2 ERA Action Plan · part 1/1 · 2021-12-22 · 685 KB
Combined Level 1 Exceedance Response Action Report & Level 2 Exceedance Report Action Plan
Source file type Level 1 Technical Report · part 1/1 · 2021-12-22 · 685 KB
MRL ERA Lvl. 2 Tech Rpt
Source file type Level 2 Technical Report · part 1/1 · 2021-01-01 · 686 KB
MRL Level 2 ERA
Source file type Level 2 ERA Action Plan · part 1/1 · 2020-01-01 · 675 KB
Level 1 Technical Report
Source file type Level 1 Technical Report · part 1/1 · 2018-12-29 · 831 KB
04-07-26 Mad River Lumber Inspection Report
Source file type Final Inspection Report · 2026-06-15 · 4.0 MB
QSE 4 Lab Rpt
Source file type Laboratory Results · part 1/1 · 2026-04-22 · 481 KB
QSE 3 Lab Report
Source file type Laboratory Results · 2026-02-25 · 756 KB
QSE 1 Lab Report
Source file type Laboratory Results · part 1/1 · 2026-01-26 · 761 KB
QSE 1 2025-2025
Source file type Laboratory Results · part 1/1 · 2025-12-09 · 779 KB
QSE 4 Lab Report
Source file type Laboratory Results · 2025-04-15 · 739 KB
MRL Lab Report 12-13-24
Source file type Laboratory Results · 2025-02-25 · 488 KB
MRL Lab Report 11-1-24
Source file type Laboratory Results · 2025-02-25 · 592 KB
11-14-24 Lab Report
Source file type Laboratory Results · 2024-03-25 · 415 KB
2-29-24 Lab Report
Source file type Laboratory Results · 2024-03-25 · 435 KB
1-31-24 Lab Report
Source file type Laboratory Results · 2024-03-25 · 515 KB
11-30-23 Lab Report
Source file type Laboratory Results · 2024-03-25 · 478 KB
QSE 5 4-10-23
Source file type Laboratory Results · part 1/1 · 2023-04-24 · 346 KB
QSE 4 3-9-23 Lab Rpt
Source file type Laboratory Results · part 1/1 · 2023-04-24 · 359 KB
QSE 3 2-14-23 Lab Rpt
Source file type Laboratory Results · 2023-02-23 · 365 KB
QSE 2 12-26-22
Source file type Laboratory Results · 2023-01-20 · 388 KB
QSE 1 11-30-22
Source file type Laboratory Results · part 1/1 · 2022-12-29 · 398 KB
NCL Lab Rpt 5-5-22
Source file type Laboratory Results · part 1/1 · 2022-06-13 · 359 KB
NCL Lab Rpt 3-15-22.pdf
Source file type Laboratory Results · part 1/1 · 2022-04-01 · 368 KB
NCL Lab Rpt 12-13-21
Source file type Laboratory Results · part 1/1 · 2022-01-12 · 414 KB
NCL Lab Rpt 11-4-21
Source file type Laboratory Results · part 1/1 · 2022-01-04 · 359 KB
QSE 4 Lab Results
Source file type Laboratory Results · part 1/1 · 2021-05-14 · 282 KB
QSE 3 Lab Results
Source file type Laboratory Results · part 1/1 · 2021-05-11 · 419 KB
Lab Rpt 12-21-20
Source file type Laboratory Results · part 1/1 · 2021-03-18 · 378 KB
Lab Rpt 12-13-20
Source file type Laboratory Results · part 1/1 · 2021-03-18 · 367 KB
Lab Report
Source file type Laboratory Results · part 1/1 · 2020-06-15 · 274 KB
North Coast Labs Report
Source file type Laboratory Results · part 1/1 · 2020-06-15 · 412 KB
LabRpt 12-21-19
Source file type Laboratory Results · part 1/1 · 2020-01-22 · 278 KB
LabRpt 12-13-19
Source file type Laboratory Results · part 1/1 · 2020-01-22 · 280 KB
QSE 4 - 4-5-2019
Source file type Laboratory Results · part 1/1 · 2019-05-29 · 424 KB
QSE 3 - 3/6/2019
Source file type Laboratory Results · part 1/1 · 2019-05-29 · 356 KB
QSE 2 - 12-14-2018
Source file type Laboratory Results · part 1/1 · 2019-05-29 · 358 KB
QSE 1 - 11-21-2019
Source file type Laboratory Results · part 1/1 · 2019-05-29 · 413 KB
4 QSE Sample Results
Source file type Laboratory Results · part 1/1 · 2018-04-23 · 358 KB
March 8, 2018 Lab Rpt
Source file type Laboratory Results · part 1/1 · 2018-04-20 · 336 KB
Dec. 27, 2017 Lab Rpt
Source file type Laboratory Results · part 1/1 · 2018-02-07 · 419 KB
December 12, 2017 Lab Rpt
Source file type Laboratory Results · part 1/1 · 2018-02-02 · 436 KB
MRL Level 2 ERA Technical Report 2026 Update
Source file type Other · 2026-07-08 · 618 KB
Annual Training AGENDA 5-29-24
Source file type Supporting Documentation · 2024-06-19 · 475 KB
Annual Training Agenda 6-23-22
Source file type Other · part 1/1 · 2022-07-05 · 233 KB
Annual Training Sheet
Source file type Supporting Documentation · part 1/1 · 2020-06-29 · 243 KB
Exceedance Letter
Source file type Cover/Explanation Letter · 2020-01-06 · 271 KB
Inspection report
Source file type Photograph · 2019-08-27 · 4.9 MB
Updated SWPPP
Source file type Other · part 1/1 · 2019-03-01 · 6.7 MB
Enforcement
Enforcement actions as recorded by the State Water Board for this permit, in the source system's own terminology.
Structured enforcement records are not yet connected for this site. The absence of a record is not a finding about this facility.
Reporting
Annual report and Exceedance Response Action information as stated by the source system, distinguished from what is inferred from document metadata.
Annual report documents on file
DerivedYears are YDOS-derived from attachment metadata. A gap means no annual-report document was identified for that year in the attachment index — it is not a finding that a report was not filed.
Recent activity
New or changed source records this platform detected for this permit, newest first.
No source change has been detected for this permit yet. Change detection begins from the date each dataset was first indexed.
Provenance