Mormon Slough (San Joaquin County; outside Delta Boundary)

2026 303(d) list Waterbody ID CAR5313000020021209142456 River & Stream Region 5 · Central Valley

At a glance

2026 listing Evidence: State-published: On the 2026 303(d) list · 1 Appendix A decision; Category 5: a TMDL is required; What a listing means
Pollutants and stressors: 1 pollutant in 1 Appendix A category; Pathogens (1); Listing decisions
TMDL information Evidence: State-published: 1 decision with a TMDL requirement status; Status codes as published: 5A; TMDL details
Regional Water Board: Region 5 · Central Valley; River & Stream · Map
Industrial stormwater facilities: 0 report it as their receiving water Evidence: identification corroborated; 79 within 1 km Evidence: geographic proximity; Neither count establishes a discharge · Facilities

What a 303(d) listing means

The Clean Water Act section 303(d) list names waters that do not meet water quality standards for one or more pollutants or stressors. California publishes it in the Integrated Report; this page shows the 2026 decisions from Appendix A as published.

A listing describes the condition of the waterbody. It does not identify which sources cause the impairment, and it does not by itself place a requirement on any particular facility.
Listed waters do not all have the same status. The Integrated Report category says how an impairment is being addressed: 5, a TMDL is required; 4a, addressed by a USEPA-approved TMDL; 4b, addressed by other pollution control requirements; 4c, impairment not caused by a pollutant. This waterbody's decisions are in category 5.
TMDL requirement status values (such as 5A or 5B) are shown exactly as published in Appendix A.

2026 listing status Evidence: State-published

On the 2026 303(d) list: Yes
Appendix A decisions: 1
Integrated Report category: 5 (a TMDL is required)
Listing cycle: 2026
State Board adoption: 2026-02-03 (Resolution 2026-0005)
USEPA approval: not confirmed — submittal letter to USEPA published; no approval found on the report page (checked 2026-10-22)
Regional Water Board: 5 — Central Valley

Published by the State Water Resources Control Board (2026 California Integrated Report, Appendix A). Listing status is taken from Appendix A only. A listing describes the condition of this waterbody, not of any facility.

Location

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Open this area on the statewide map · Browse impaired waters

Listing decisions and pollutants Evidence: State-published

Grouped by the Pollutant Category published in Appendix A. Pollutant names, categories and decisions are exactly as published.

Pathogens (1 decision)

Pathogens: Appendix A decisions
Pollutant	Pollutant category	Category	Final listing decision	Decision status	Sources	Decision ID
Indicator Bacteria	Pathogens	5	Do Not Delist from 303(d) list (TMDL required list)	Revised	A Source Unknown	165312

TMDL information Evidence: State-published

TMDL information published for this waterbody
Pollutant	TMDL requirement status	TMDL project	Priority	USEPA approval of TMDL	Expected attainment
Indicator Bacteria	5A	—	Low	—	—

This is TMDL information for the waterbody. It does not establish that a TMDL applies to any particular facility. Facility-specific TMDL requirements recorded in SMARTS appear on facility pages and are not linked to this waterbody until reviewed.

HUC12 watersheds

Published with the listing Evidence: publisher-reported

McLeod Lake-Mormon Slough 180400030303

Overlapping the waterbody's shape Evidence: spatial

McLeod Lake-Mormon Slough 180400030303 also published

Industrial stormwater facilities

Evidence: identification corroborated

Shows: the facility named this waterbody as its receiving water in SMARTS, and the name and the facility's location are consistent with it. Does not establish: a discharge pathway, a discharge of any pollutant, or a cause of the listing.

Evidence: geographic proximity

Shows: the facility's reported location is within 1 km of the waterbody's mapped shape. Does not establish: that the facility discharges to this waterbody, or any other relationship.

Report this waterbody as their receiving water Evidence: identification corroborated

No facility's reported receiving water is identified as this waterbody.

Within 1 km of a facility's reported location Evidence: geographic proximity

Spatial proximity only; discharge pathway not established. Being near this waterbody does not mean a facility discharges to it.

Facilities whose reported location is within 1 km of this waterbody
Facility	WDID	Status	Distance	Map
Super Auto Parts	5S39I028274	Terminated	27 m	map
West Pallets	5S39IN607691	NOI Required	42 m	map
West Pallets	5S39NEC012721	Active	42 m	map
West Pallets	5S39NEC012724	Active	42 m	map
Delta Pump Inc	5S39NEC010045	Active	42 m	map
Foreign Auto Parts &Dismantler	5S39I010232	Terminated	46 m	map
Acme Lift Trucks	5S39I015664	Terminated	52 m	map
Acme Truck Parts & Equipment	5S39I017081	Terminated	52 m	map
LKQ Acme Truck Parts	5S39I023389	Terminated	53 m	map
LKQ Acme Trucks Parts	5S39I023655	Terminated	60 m	map
Finish Line Auto Parts	5S39I028854	Active	64 m	map
M&M Auto Dismantling	5S39I004179	Terminated	67 m	map
A & A Standard Transmission	5S39I003884	Terminated	76 m	map
Juarez Metals	5S39I015757	Terminated	77 m	map
JM Dismantler Inc	5S39I029188	Terminated	79 m	map
Federal Express	5S39I005985	Terminated	80 m	map
Acme Truck Parts & Equipment	5S39I001600	Terminated	90 m	map
Union Planing Mill	5S39I014554	Terminated	93 m	map
SMM Stockton	5S39I003996	Active	100 m	map
Concrete Inc Stockton Plant	5S39I006068	Terminated	102 m	map
All Good Pallets Inc	5S39NEC014231	Active	109 m	map
Quikrete Northern CA	5S39I011700	Terminated	110 m	map
Quikrete Northern CA	5S39I016658	Terminated	110 m	map
All Good Pallets Sto	5S39NEC012215	Terminated	112 m	map
Stockton Plating Inc	5S39I004380	Terminated	119 m	map
Keystone Automotive Ind Inc	5S39I013273	Terminated	119 m	map
United Rentals Branch No 524	5S39I019657	Terminated	123 m	map
Fairgrounds Industrial Park	5S39I014307	Terminated	139 m	map
Abel Bldg Materials	5S39I015218	Terminated	145 m	map
General Transp Inc	5S39I007235	Terminated	177 m	map
Valley Pattern & Mfg Inc	5S39I001112	Terminated	183 m	map
99 Recycling Center	5S39NEC002042	Terminated	230 m	map
URecycle Inc DBA 99 Recycling Center	5S39NNA000073	NONA Submitted	230 m	map
Diamond Foods Inc	5S39I000659	Active	241 m	map
Andersen Rack Systems Inc	5S39I009969	Terminated	241 m	map
Western Stone Prod Inc	5S39I003639	Terminated	242 m	map
Eldorado Chem Co Inc	5S39I014187	Terminated	254 m	map
San Joaquin Lumber	5S39I014972	Terminated	277 m	map
CA Welding Supply Co	5S39I004965	Terminated	280 m	map
Stockton Tri Industries Inc	5S39I013712	Terminated	293 m	map
Geiger Manufacturing Inc	5S39I011259	Terminated	300 m	map
Geiger Manufacturing Inc	5S39NEC002743	Active	300 m	map
California Pallets Inc	5S39I028279	Active	301 m	map
Morton Paint Co	5S39I009306	Terminated	308 m	map
Stockton Tri Industries LLC	5S39I028909	Active	322 m	map
N J McCutchen Inc	5S39I017472	Active	330 m	map
El Primo Dismantle	5S39I023762	Terminated	331 m	map
Mr Dons Auto and Trucks Wrecking Dismantler	5S39I028277	Active	342 m	map
I Tre Corp	5S39I009910	Terminated	371 m	map
New Stockton Poultry Inc	5S39I028891	Active	383 m	map

79 facilities, nearest first. Page 1 of 2: next

Sources and provenance

Sources behind this page
Information	Source	Retrieved
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 (facility_huc12/1, proximity/1, receiving_water/2, tmdl_reference/1, waterbody_huc12_ovl/1, waterbody_huc12_pub/1).

Integrated Report categories: 5, a TMDL is required; 4a, addressed by a USEPA-approved TMDL; 4b, addressed by other pollution control requirements; 4c, impairment not caused by a pollutant.