Arden Engineering
Active WDID 8 30I020694 Orange, Orange County Region 8 · Santa Ana
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Orange, Orange County
- Region 8 · Santa Ana · Location · Statewide map
- Receiving water
- Santa Ana 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
- 2 waterbodies; 0 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 498 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Feb 16, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 2 inspections · 13 violation records · 11 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
- 33.81865, -117.86733
- Precision
- 5 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
- 1878 N Main St, Orange 92865
- Regional Water Board
- 8 — Santa Ana
HUC12 watershed Evidence: spatial
- Walnut Canyon-Santa Ana River HUC12 180702031002
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
- Arden Engineering
- Primary industry (SIC)
- 3728-Aircraft Parts and Auxiliary Equipment, NEC
- Application ID
- 321195
- NOI processed
- Feb 27, 2007
- Last certified
- Oct 25, 2022
- Facility size
- 1.5 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 321195 | Industrial | Active | Feb 27, 2007 | — | Oct 25, 2022 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Santa Ana River
- Discharges directly / indirectly
- Y / 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
6 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 |
|---|---|---|---|
| Santa Ana River, Reach 2 CAR8011300019991014130438 | 169 m | not listed | 0 |
| Collins Channel CAR8011100020251002056453 | 981 m | not listed | 0 |
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.
498 distinct measurements across 15 parameters, most recent sample Feb 16, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 36 | 6 | 0 | Oct 14, 2025 | Feb 16, 2026 |
| 2024 | 12 | 6 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2023 | 60 | 6 | 0 | Dec 30, 2023 | Mar 30, 2024 |
| 2022 | 42 | 6 | 0 | Nov 08, 2022 | Jan 14, 2023 |
| 2021 | 36 | 8 | 0 | Dec 14, 2021 | Mar 28, 2022 |
| 2020 | 36 | 7 | 0 | Dec 28, 2020 | Mar 03, 2021 |
| 2019 | 60 | 8 | 0 | Nov 20, 2019 | Apr 06, 2020 |
| 2018 | 60 | 6 | 0 | Nov 29, 2018 | May 16, 2019 |
| 2017 | 12 | 6 | 0 | Jan 09, 2018 | Jan 09, 2018 |
| 2016 | 62 | 11 | 0 | Dec 15, 2016 | Jan 19, 2017 |
| 2015 | 82 | 12 | 0 | Sep 15, 2015 | Apr 07, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Chemical Oxygen Demand (COD) | mg/L | 73 | 5 | Sep 15, 2015 | Feb 16, 2026 | Results |
| Oil and Grease | mg/L | 73 | 10 | Sep 15, 2015 | Feb 16, 2026 | Results |
| pH | SU | 73 | 0 | Sep 15, 2015 | Feb 16, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 71 | 4 | Sep 15, 2015 | Feb 16, 2026 | Results |
| Aluminum, Total | mg/L | 38 | 0 | Sep 15, 2015 | Feb 13, 2025 | Results |
| Zinc, Total | mg/L | 38 | 0 | Sep 15, 2015 | Feb 13, 2025 | Results |
| Aluminum, Total Recoverable | mg/L | 35 | 0 | Dec 23, 2019 | Feb 16, 2026 | Results |
| Zinc, Total Recoverable | mg/L | 35 | 0 | Dec 23, 2019 | Feb 16, 2026 | Results |
| Nitrate, Total (as N) | mg/L | 14 | 1 | Sep 15, 2015 | Jan 19, 2017 | Results |
| Nitrate, Total (as NO3) | mg/L | 14 | 1 | Sep 15, 2015 | Jan 19, 2017 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 12 | 0 | Sep 15, 2015 | Jan 19, 2017 | Results |
| Nitrite, Total (as N) | mg/L | 8 | 1 | Sep 15, 2015 | Jan 19, 2017 | Results |
Show 3 more parameters
All results (498 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 16, 2026 | Aluminum, Total Recoverable | .26 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370379 | |
| Feb 16, 2026 | Aluminum, Total Recoverable | .29 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370379 | |
| Feb 16, 2026 | Chemical Oxygen Demand (COD) | 32 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1370379 | |
| Feb 16, 2026 | Chemical Oxygen Demand (COD) | 30 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1370379 | |
| Feb 16, 2026 | Oil and Grease | ND 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370379 | |
| Feb 16, 2026 | Oil and Grease | ND 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1370379 | |
| Feb 16, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1370379 | |
| Feb 16, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1370379 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 7.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370379 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370379 | |
| Feb 16, 2026 | Zinc, Total Recoverable | .049 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370379 | |
| Feb 16, 2026 | Zinc, Total Recoverable | .073 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1370379 | |
| Dec 31, 2025 | Aluminum, Total Recoverable | .076 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365234 | |
| Dec 31, 2025 | Aluminum, Total Recoverable | .48 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365234 | |
| Dec 31, 2025 | Chemical Oxygen Demand (COD) | 890 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1365234 | |
| Dec 31, 2025 | Chemical Oxygen Demand (COD) | 160 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1365234 | |
| Dec 31, 2025 | Oil and Grease | 4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1365234 | |
| Dec 31, 2025 | Oil and Grease | 5.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1365234 | |
| Dec 31, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1365234 | |
| Dec 31, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1365234 | |
| Dec 31, 2025 | Total Suspended Solids (TSS) | 3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365234 | |
| Dec 31, 2025 | Total Suspended Solids (TSS) | 9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365234 | |
| Dec 31, 2025 | Zinc, Total Recoverable | .073 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365234 | |
| Dec 31, 2025 | Zinc, Total Recoverable | .074 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365234 | |
| Oct 14, 2025 | Aluminum, Total Recoverable | .21 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1355590 | |
| Oct 14, 2025 | Aluminum, Total Recoverable | .18 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1355590 | |
| Oct 14, 2025 | Chemical Oxygen Demand (COD) | 59 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1355590 | |
| Oct 14, 2025 | Chemical Oxygen Demand (COD) | 31 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1355590 | |
| Oct 14, 2025 | Oil and Grease | 2.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1355590 | |
| Oct 14, 2025 | Oil and Grease | 2.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1355590 | |
| Oct 14, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1355590 | |
| Oct 14, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1355590 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | 8.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1355590 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | 5.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1355590 | |
| Oct 14, 2025 | Zinc, Total Recoverable | .11 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1355590 | |
| Oct 14, 2025 | Zinc, Total Recoverable | .056 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1355590 | |
| Feb 13, 2025 | Aluminum, Total | .25 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1328509 | |
| Feb 13, 2025 | Aluminum, Total | 1.4 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1328509 | |
| Feb 13, 2025 | Chemical Oxygen Demand (COD) | 110 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1328509 | |
| Feb 13, 2025 | Chemical Oxygen Demand (COD) | 72 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1328509 | |
| Feb 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1328509 | |
| Feb 13, 2025 | Oil and Grease | 5.6 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1328509 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1328509 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1328509 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 26 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1328509 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 33 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1328509 | |
| Feb 13, 2025 | Zinc, Total | .142 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1328509 | |
| Feb 13, 2025 | Zinc, Total | .174 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1328509 | |
| Mar 30, 2024 | Aluminum, Total Recoverable | .58 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1285028 | |
| Mar 30, 2024 | Aluminum, Total Recoverable | .1 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1285028 |
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 | 13 | 13 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 02, 2007 – Jul 16, 2020 | Oct 21, 2026 | All violations |
| Enforcement actions | 11 | 11 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 01, 2007 – Aug 12, 2020 | Oct 21, 2026 | All actions |
| Inspections | 2 | inspections, not findings | Mar 03, 2015 – Jul 30, 2019 | 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 (37 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 11, 2026 | Annual reports | 1334633 | Annual report 2025 | — | |
| Jun 27, 2025 | Annual reports | 1293423 | Annual report 2024 | — | |
| Jun 14, 2024 | Annual reports | 1242453 | Annual report 2023 | — | |
| Jun 23, 2023 | Annual reports | 1188418 | Annual report 2022 | — | |
| Jul 11, 2022 | Annual reports | 1111719 | Annual report 2021 | — | |
| Jul 27, 2021 | Annual reports | 1067684 | Annual report 2020 | — | |
| Aug 13, 2020 | Annual reports | 984874 | Annual report 2019 | — | |
| Aug 12, 2020 | Enforcement actions | 437077 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 16, 2020 | Violations | 873521 | Late Report | Violation | Report |
| Aug 05, 2019 | Enforcement actions | 433643 | SEL (Staff Enforcement Letter) | Historical | |
| Jul 30, 2019 | Inspections | 2043615 | B Type compliance | — | Follow-up Inspection Needed |
| Jul 30, 2019 | Violations | 870503 | Unauthorized NSWD | Violation | Inspection |
| Jul 30, 2019 | Violations | 870504 | Deficient BMP Implementation | Violation | Inspection |
| Jul 30, 2019 | Violations | 870505 | Incomplete/Insufficient SWPPP | Violation | Inspection |
| Jun 26, 2019 | Annual reports | 952389 | Annual report 2018 | — | |
| Sep 17, 2018 | Annual reports | 937802 | Annual report 2017 | — | |
| Aug 30, 2018 | Enforcement actions | 430402 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Aug 01, 2018 | Enforcement actions | 430075 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 16, 2018 | Violations | 867175 | Late Report | Violation | Report |
| Aug 29, 2017 | Annual reports | 876989 | Annual report 2016 | — | |
| Jul 31, 2017 | Enforcement actions | 426599 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 16, 2017 | Violations | 863818 | Late Report | Violation | Annual Report |
| Jul 11, 2016 | Annual reports | 843222 | Annual report 2015 | — | |
| Mar 06, 2015 | Enforcement actions | 418469 | Verbal Communication | Historical | |
| Mar 03, 2015 | Inspections | 2024907 | B Type compliance | — | Additional Info Required |
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.