Puddingstone Reservoir

Waterbody ID (WBID): CAL4055200019980918113803
County / counties: Los Angeles
Regional Water Board: Regional Board 4 - Los Angeles Region
Waterbody type: Lake & Reservoir
Condition category: Category 5 — 303(d) listed, TMDL required
Integrated Report cycle: 2026

303(d) listings (5)

Each row is one official listing decision from Appendix A of the Final 2026 California Integrated Report. Source terminology is preserved as published.

Pollutant / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
ChlordanePesticides	136227	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Echo Lake, PeckRd Lake DDT/PCBs/Chlordane (19)	—
DDT (Dichlorodiphenyltrichloroethane)Pesticides	150505	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Echo Lake, PeckRd Lake DDT/PCBs/Chlordane (19)	—
MercuryMetals	149778	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Echo Lake, PeckRd Lake DDT/PCBs/Chlordane (19)	—
Organic Enrichment/Low Dissolved OxygenNutrients	70238	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
PCBs (Polychlorinated biphenyls)Toxic Organics	136236	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Echo Lake, PeckRd Lake DDT/PCBs/Chlordane (19)	—

Source & provenance

Agency: California State Water Resources Control Board
Report: Final 2026 California Integrated Report
Dataset: Appendix A — 2026 303(d) List of Impaired Waters
Imported: Aug 21, 2026, 12:44 AM UTC
Waterbody ID: CAL4055200019980918113803
CALWNUM: 4405.52
WBD code: 180701060402
Geometry: Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

View official Water Board fact sheet ↗Download Appendix A source file ↗

Location

Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.

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Watershed: —
Assessed size: 243.94 Acres

Industrial permits with stated TMDL requirements (1)

Facilities whose SMARTS industrial permit carries a TMDL requirement that names this waterbody.

Official record — SMARTS TMDL dataset, State Water Board

Permits: 1
Stated requirements: 1
Regulated parameters: Nitrogen, Total (as N)

4 19I030500

4 19I030500 · Active

Los Angeles Area Lakes TMDL

Parameters Nitrogen, Total (as N)

Stated limits 1

TMDL names, parameters and permit identifiers are stated by the Water Board in SMARTS. The association of a stated receiving-water name to this 2026 303(d) waterbody is a derived exact-name match, and the list is limited to the first 100 permits. No exceedance, violation or compliance conclusion is drawn.

Derived facility associations

Industrial stormwater facilities geographically associated with this waterbody. These are derived spatial associations, not Water Board findings.

Derived

5 Boys Precision Machining

Covina · No Exposure Certification

derived_watershed_association