Hartwell Corporation
Active WDID 8 30I003741 Placentia, 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
- Placentia, Orange County
- Region 8 · Santa Ana · 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
- 407 distinct results, 10 reporting years (2016 to 2025)
- Most recent sample Oct 14, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 4 inspections · 10 violation records · 12 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
- 33.86299, -117.82594
- 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
- 900 S Richfield Rd, Placentia 92870
- Regional Water Board
- 8 — Santa Ana
HUC12 watershed Evidence: spatial
- Carbon Creek HUC12 180701060605
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
- Hartwell Corporation
- Primary industry (SIC)
- 3728-Aircraft Parts and Auxiliary Equipment, NEC
- Application ID
- 208402
- NOI processed
- Apr 06, 1992
- Last certified
- Jun 30, 2026
- Facility size
- 80000 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 208402 | Industrial | Active | Apr 06, 1992 | — | Jun 30, 2026 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Santa Ana River Lakes
- Discharges directly / indirectly
- N / 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.
407 distinct measurements across 7 parameters, most recent sample Oct 14, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 14 | 7 | 0 | Oct 14, 2025 | Oct 14, 2025 |
| 2024 | 42 | 7 | 0 | Feb 07, 2025 | Apr 26, 2025 |
| 2023 | 56 | 7 | 0 | Jan 22, 2024 | Mar 30, 2024 |
| 2022 | 54 | 7 | 0 | Dec 12, 2022 | Mar 21, 2023 |
| 2021 | 38 | 7 | 0 | Oct 26, 2021 | Mar 28, 2022 |
| 2020 | 56 | 7 | 0 | Dec 28, 2020 | Mar 10, 2021 |
| 2019 | 56 | 7 | 0 | Nov 20, 2019 | Mar 10, 2020 |
| 2018 | 28 | 7 | 0 | Dec 05, 2018 | Feb 14, 2019 |
| 2017 | 42 | 7 | 0 | Jan 09, 2018 | Mar 13, 2018 |
| 2016 | 21 | 7 | 0 | Dec 16, 2016 | Jan 12, 2017 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Total Suspended Solids (TSS) | mg/L | 59 | 9 | Dec 16, 2016 | Oct 14, 2025 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 57 | 2 | Dec 16, 2016 | Oct 14, 2025 | Results |
| Oil and Grease | mg/L | 57 | 43 | Dec 16, 2016 | Oct 14, 2025 | Results |
| pH | SU | 57 | 0 | Dec 16, 2016 | Oct 14, 2025 | Results |
| Aluminum, Total Recoverable | ug/L | 30 | 0 | Oct 26, 2021 | Oct 14, 2025 | Results |
| Iron, Total Recoverable | ug/L | 30 | 13 | Oct 26, 2021 | Oct 14, 2025 | Results |
| Zinc, Total Recoverable | ug/L | 30 | 0 | Oct 26, 2021 | Oct 14, 2025 | Results |
| Aluminum, Total Recoverable | mg/L | 29 | 1 | Dec 16, 2016 | Mar 10, 2021 | Results |
| Iron, Total Recoverable | mg/L | 29 | 7 | Dec 16, 2016 | Mar 10, 2021 | Results |
| Zinc, Total Recoverable | mg/L | 29 | 1 | Dec 16, 2016 | Mar 10, 2021 | Results |
pH results (57 distinct rows, show all)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Oct 14, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1358749 | |
| Oct 14, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1358749 | |
| Apr 26, 2025 | pH | 8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1331943 | |
| Apr 26, 2025 | pH | 8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1331943 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1328727 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1328727 | |
| Feb 07, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1329022 | |
| Feb 07, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1329022 | |
| Mar 30, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1286918 | |
| Mar 30, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1286918 | |
| Feb 05, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282657 | |
| Feb 05, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282657 | |
| Feb 01, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282641 | |
| Feb 01, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282641 | |
| Jan 22, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1279348 | |
| Jan 22, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1279348 | |
| Mar 21, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1238115 | |
| Mar 21, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1238115 | |
| Mar 15, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1236115 | |
| Mar 15, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1236115 | |
| Feb 25, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1224323 | |
| Feb 25, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1224323 | |
| Dec 12, 2022 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1224320 | |
| Dec 12, 2022 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1224320 | |
| Mar 28, 2022 | pH | 7 | SU | Effluent | Qualifying Storm Event | 1187096 | ||
| Mar 28, 2022 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1187096 | |
| Dec 30, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | 1187089 | ||
| Dec 30, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | 1187089 | ||
| Mar 10, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1149087 | |
| Mar 10, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1149087 | |
| Mar 03, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1148056 | |
| Mar 03, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1148056 | |
| Jan 23, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1145614 | |
| Jan 23, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1145614 | |
| Dec 28, 2020 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1141789 | |
| Dec 28, 2020 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1141789 | |
| Mar 10, 2020 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1105286 | |
| Mar 10, 2020 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1105286 | |
| Feb 09, 2020 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1103694 | |
| Feb 09, 2020 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1103694 | |
| Dec 04, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1099532 | |
| Dec 04, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1099532 | |
| Nov 20, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1094646 | |
| Nov 20, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1094646 | |
| Feb 14, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1049503 | |
| Feb 14, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1049503 | |
| Dec 05, 2018 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1037603 | |
| Dec 05, 2018 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1037603 | |
| Mar 13, 2018 | pH | 6.8 | SU | Effluent | Qualifying Storm Event | A4500HB | 997606 | |
| Mar 13, 2018 | pH | 6.7 | SU | Effluent | Qualifying Storm Event | A4500HB | 997606 |
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 | 10 | 10 Violation · 0 Potential (preliminary) · 0 Dismissed | Sep 13, 2001 – Jan 15, 2015 | Oct 21, 2026 | All violations |
| Enforcement actions | 12 | 11 issued · 0 draft · 1 withdrawn, rescinded or superseded | Oct 16, 2001 – Jan 15, 2015 | Oct 21, 2026 | All actions |
| Inspections | 4 | inspections, not findings | Jul 25, 2001 – Feb 28, 2018 | 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 |
|---|---|---|---|---|---|
| Jul 15, 2026 | Annual reports | 1334388 | Annual report 2025 | — | |
| Jun 18, 2025 | Annual reports | 1293170 | Annual report 2024 | — | |
| Jun 20, 2024 | Annual reports | 1242189 | Annual report 2023 | — | |
| Jul 07, 2023 | Annual reports | 1188139 | Annual report 2022 | — | |
| Jul 15, 2022 | Annual reports | 1111422 | Annual report 2021 | — | |
| Jul 08, 2021 | Annual reports | 1067373 | Annual report 2020 | — | |
| Jun 17, 2020 | Annual reports | 984549 | Annual report 2019 | — | |
| Jul 15, 2019 | Annual reports | 952059 | Annual report 2018 | — | |
| Jun 20, 2018 | Annual reports | 937471 | Annual report 2017 | — | |
| Feb 28, 2018 | Inspections | 2036833 | B Type compliance | — | No Further Action |
| May 17, 2017 | Annual reports | 876635 | Annual report 2016 | — | |
| Feb 16, 2017 | Annual reports | 840166 | Annual report 2015 | — | |
| Jan 15, 2015 | Enforcement actions | 418201 | SEL (Staff Enforcement Letter) | Historical | |
| Jan 15, 2015 | Violations | 856253 | Deficient Report | Violation | Report |
| Mar 02, 2012 | Enforcement actions | 408118 | Verbal Communication | Historical | |
| Mar 02, 2012 | Inspections | 2014427 | B Type compliance | — | No Further Action |
| Mar 02, 2012 | Violations | 847429 | Deficient BMP Implementation | Violation | Inspection |
| Sep 20, 2006 | Violations | 434403 | Late Report | Violation | Report |
| Aug 31, 2006 | Enforcement actions | 419419 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Aug 31, 2006 | Violations | 433982 | Late Report | Violation | Report |
| Aug 01, 2006 | Enforcement actions | 311962 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Rescinded | |
| Aug 01, 2006 | Violations | 433012 | Late Report | Violation | Report |
| Feb 24, 2006 | Enforcement actions | 297749 | NNC (Notice of Non-Compliance) | Active | |
| Sep 01, 2005 | Enforcement actions | 310477 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Jul 15, 2005 | Enforcement actions | 418737 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical |
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.