Darling Ingredients Inc
Active WDID 2 38I005930 San Francisco, San Francisco County Region 2 · San Francisco Bay
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- San Francisco, San Francisco County
- Region 2 · San Francisco Bay · Location · Statewide map
- Receiving water
- Islais 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
- 2 waterbodies; 2 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 512 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample May 07, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 3 inspections · 3 violation records · 2 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
- 37.74585, -122.38468
- 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
- 429 AMADOR, San Francisco 94124
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- San Francisco Bay Estuaries-Frontal San Francisco Bay HUC12 180500041001
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
- Darling Ingredients Inc
- Primary industry (SIC)
- 2077-Animal and Marine Fats and Oils
- Application ID
- 182589
- NOI processed
- Apr 17, 1992
- Last certified
- May 06, 2020
- Facility size
- 6 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 182589 | Industrial | Active | Apr 17, 1992 | — | May 06, 2020 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Islais Creek
- Discharges directly / indirectly
- Y / 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
2 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 |
|---|---|---|---|
| Islais Creek Channel CAE2044001020020129151927 | 122 m | listed | 7 |
| San Francisco Bay, Central CAB2031201019981217171707 | 798 m | listed | 11 |
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.
512 distinct measurements across 12 parameters, most recent sample May 07, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 34 | 6 | 0 | Dec 23, 2025 | May 07, 2026 |
| 2024 | 36 | 6 | 0 | Dec 03, 2024 | Feb 11, 2025 |
| 2023 | 24 | 6 | 0 | Dec 12, 2023 | Apr 04, 2024 |
| 2022 | 60 | 10 | 0 | Dec 16, 2022 | Jun 13, 2023 |
| 2021 | 18 | 9 | 0 | Oct 26, 2021 | Oct 26, 2021 |
| 2020 | 40 | 12 | 0 | Dec 22, 2020 | Jun 03, 2021 |
| 2019 | 48 | 12 | 0 | Dec 04, 2019 | Apr 02, 2020 |
| 2018 | 72 | 12 | 0 | Feb 27, 2019 | May 20, 2019 |
| 2017 | 72 | 12 | 0 | Nov 16, 2017 | Apr 05, 2018 |
| 2016 | 60 | 6 | 0 | Dec 08, 2016 | Mar 24, 2017 |
| 2015 | 48 | 6 | 0 | Dec 03, 2015 | Mar 10, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Chemical Oxygen Demand (COD) | mg/L | 62 | 9 | Dec 03, 2015 | May 07, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 62 | 26 | Dec 03, 2015 | May 07, 2026 | Results |
| Oil and Grease | mg/L | 62 | 33 | Dec 03, 2015 | May 07, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 62 | 5 | Dec 03, 2015 | May 07, 2026 | Results |
| Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | mg/L | 60 | 15 | Dec 03, 2015 | May 07, 2026 | Results |
| pH | SU | 60 | 0 | Dec 03, 2015 | May 07, 2026 | Results |
| Copper, Total Recoverable | ug/L | 28 | 6 | Nov 16, 2017 | Jun 13, 2023 | Results |
| Zinc, Total Recoverable | ug/L | 28 | 0 | Nov 16, 2017 | Jun 13, 2023 | Results |
| Aluminum, Total Recoverable | ug/L | 26 | 1 | Nov 16, 2017 | Jun 13, 2023 | Results |
| Iron, Total Recoverable | ug/L | 26 | 0 | Nov 16, 2017 | Jun 13, 2023 | Results |
| Copper, Dissolved | mg/L | 18 | 8 | Nov 16, 2017 | Dec 22, 2020 | Results |
| Zinc, Dissolved | mg/L | 18 | 0 | Nov 16, 2017 | Dec 22, 2020 | Results |
All results (512 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| May 07, 2026 | Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | ND | mg/L | Effluent | Qualifying Storm Event | A5210B | 1374517 | |
| May 07, 2026 | Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | ND | mg/L | Effluent | Qualifying Storm Event | A5210B | 1374517 | |
| May 07, 2026 | Chemical Oxygen Demand (COD) | ND | mg/L | Effluent | Qualifying Storm Event | A5220D | 1374517 | |
| May 07, 2026 | Chemical Oxygen Demand (COD) | ND | mg/L | Effluent | Qualifying Storm Event | A5220D | 1374517 | |
| May 07, 2026 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500F | 1374517 | |
| May 07, 2026 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500F | 1374517 | |
| May 07, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1374517 | |
| May 07, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1374517 | |
| May 07, 2026 | pH | 6.71 | SU | Effluent | Qualifying Storm Event | pH_Field | 1374517 | |
| May 07, 2026 | pH | 6.84 | SU | Effluent | Qualifying Storm Event | pH_Field | 1374517 | |
| May 07, 2026 | Total Suspended Solids (TSS) | 19 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1374517 | |
| May 07, 2026 | Total Suspended Solids (TSS) | 1.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1374517 | |
| Apr 24, 2026 | Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | 3.6 | mg/L | Effluent | Qualifying Storm Event | A5210B | 1373689 | |
| Apr 24, 2026 | Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | 10 | mg/L | Effluent | Qualifying Storm Event | A5210B | 1373689 | |
| Apr 24, 2026 | Chemical Oxygen Demand (COD) | 6 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1373689 | |
| Apr 24, 2026 | Chemical Oxygen Demand (COD) | 42 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1373689 | |
| Apr 24, 2026 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500F | 1373689 | |
| Apr 24, 2026 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500F | 1373689 | |
| Apr 24, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1373689 | |
| Apr 24, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1373689 | |
| Apr 24, 2026 | pH | 7.02 | SU | Effluent | Qualifying Storm Event | pH_Field | 1373689 | |
| Apr 24, 2026 | pH | 6.94 | SU | Effluent | Qualifying Storm Event | pH_Field | 1373689 | |
| Apr 24, 2026 | Total Suspended Solids (TSS) | 4.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373689 | |
| Apr 24, 2026 | Total Suspended Solids (TSS) | 4.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373689 | |
| Dec 23, 2025 | Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | 57 | mg/L | Effluent | Qualifying Storm Event | A5210B | 1364621 | |
| Dec 23, 2025 | Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | 6.4 | mg/L | Effluent | Qualifying Storm Event | A5210B | 1364621 | |
| Dec 23, 2025 | Chemical Oxygen Demand (COD) | 25 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1364621 | |
| Dec 23, 2025 | Chemical Oxygen Demand (COD) | 17 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1364621 | |
| Dec 23, 2025 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500F | 1364621 | |
| Dec 23, 2025 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500F | 1364621 | |
| Dec 23, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1364621 | |
| Dec 23, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1364621 | |
| Dec 23, 2025 | Total Suspended Solids (TSS) | 4.5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1364621 | |
| Dec 23, 2025 | Total Suspended Solids (TSS) | 20 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1364621 | |
| Feb 11, 2025 | Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | 9.9 | mg/L | Effluent | Qualifying Storm Event | A5210B | 1327377 | |
| Feb 11, 2025 | Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | 2.5 | mg/L | Effluent | Qualifying Storm Event | A5210B | 1327377 | |
| Feb 11, 2025 | Chemical Oxygen Demand (COD) | 24 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1327377 | |
| Feb 11, 2025 | Chemical Oxygen Demand (COD) | 16 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1327377 | |
| Feb 11, 2025 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500F | 1327377 | |
| Feb 11, 2025 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500F | 1327377 | |
| Feb 11, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327377 | |
| Feb 11, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327377 | |
| Feb 11, 2025 | pH | 6.24 | SU | Effluent | Qualifying Storm Event | pH_Field | 1327377 | |
| Feb 11, 2025 | pH | 6.06 | SU | Effluent | Qualifying Storm Event | pH_Field | 1327377 | |
| Feb 11, 2025 | Total Suspended Solids (TSS) | 7.5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327377 | |
| Feb 11, 2025 | Total Suspended Solids (TSS) | 2.1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327377 | |
| Dec 18, 2024 | Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | 2.1 | mg/L | Effluent | Qualifying Storm Event | A5210B | 1317450 | |
| Dec 18, 2024 | Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) | 2.6 | mg/L | Effluent | Qualifying Storm Event | A5210B | 1317450 | |
| Dec 18, 2024 | Chemical Oxygen Demand (COD) | 22 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1317450 | |
| Dec 18, 2024 | Chemical Oxygen Demand (COD) | 30 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1317450 |
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 | 3 | 2 Violation · 0 Potential (preliminary) · 1 Dismissed | Jul 02, 1999 – Jul 02, 2007 | Oct 21, 2026 | All violations |
| Enforcement actions | 2 | 1 issued · 1 draft · 0 withdrawn, rescinded or superseded | Sep 01, 2005 – Aug 06, 2007 | Oct 21, 2026 | All actions |
| Inspections | 3 | inspections, not findings | Sep 23, 2005 – Mar 12, 2024 | 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 (19 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 13, 2026 | Annual reports | 1334211 | Annual report 2025 | — | |
| Jul 10, 2025 | Annual reports | 1292982 | Annual report 2024 | — | |
| Jul 10, 2024 | Annual reports | 1241988 | Annual report 2023 | — | |
| Mar 12, 2024 | Inspections | 2064305 | B Type compliance | Performed | Additional Info Required |
| Jul 06, 2023 | Annual reports | 1187919 | Annual report 2022 | — | |
| Apr 13, 2023 | Inspections | 2059902 | B Type compliance | Finalized | Additional Info Required |
| Jul 15, 2022 | Annual reports | 1111189 | Annual report 2021 | — | |
| Jul 13, 2021 | Annual reports | 1067127 | Annual report 2020 | — | |
| Jul 14, 2020 | Annual reports | 984284 | Annual report 2019 | — | |
| Jul 09, 2019 | Annual reports | 951787 | Annual report 2018 | — | |
| Jul 03, 2018 | Annual reports | 937198 | Annual report 2017 | — | |
| Jul 11, 2017 | Annual reports | 876347 | Annual report 2016 | — | |
| Jul 15, 2016 | Annual reports | 840562 | Annual report 2015 | — | |
| Aug 06, 2007 | Enforcement actions | 357288 | NNC (Notice of Non-Compliance) | Historical | |
| Jul 02, 2007 | Violations | 798534 | Late Report | Violation | Report |
| Sep 23, 2005 | Inspections | 431373 | Complaint | — | No Further Action |
| Sep 01, 2005 | Enforcement actions | 312115 | NNC (Notice of Non-Compliance) | Draft | |
| Jul 04, 2005 | Violations | 436177 | Late Report | Dismissed | Report |
| Jul 02, 1999 | Violations | 137286 | Deficient Report | Violation | 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.