Western Mun. Water District (CA) Water Quality

Western Mun. Water District is a large public water system in EPA region 9 that provides tap water for the 91436, 91761, 92501, 92504 - 92509, 92517, 92518, 92551, 92557, 92660, 92879, 92883 zip codes. It has 5 facilities where the water supply was tested for 68 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 27.97 µg/L. The maximum reported level of Manganese was 6.6 µg/L. There were 2 contamintants found in the Western Mun. Water District water supply at levels that were above the minimum reporting level.

Contaminants

1,1-dichloroethane (8)

1,2,3-trichloropropane (8)

1,3-butadiene (8)

1,4-dioxane (8)

1-butanol (8)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (12)

1H,1H,2H,2H-perfluorodecane sulfonic acid (12)

1H,1H,2H,2H-perfluorohexane sulfonic acid (12)

1H,1H,2H,2H-perfluorooctane sulfonic acid (12)

2-methoxyethanol (8)

2-propen-1-ol (Allyl Alcohol) (8)

4,8-dioxa-3H-perfluorononanoic acid (12)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (12)

alpha-hexachlorocyclohexane (8)

anatoxin-a (16)

bromochloromethane (Halon 1011) (8)

bromomethane (8)

Butylated Hydroxyanisole (8)

chlorate (12)

chlorodifluoromethane (HCFC-22) (8)

chloromethane (8)

chlorpyrifos (8)

chromium (12)

chromium-6 (12)

cobalt (12)

cylindrospermopsin (16)

dimethipin (8)

ethoprop (8)

Germanium (8)

HAA5 (five regulated haloacetic acids) (32)

HAA6Br (six brominated haloacetic acids) (32)

HAA9 (nine haloacetic acids) (32)

hexafluoropropylene oxide dimer acid (GenX) (12)

lithium (12)

Manganese (8)

molybdenum (12)

N-ethyl perfluorooctanesulfonamidoacetic acid (12)

N-methyl perfluorooctanesulfonamidoacetic acid (12)

nonafluoro-3,6-dioxaheptanoic acid (12)

o-toluidine (8)

oxyfluorfen (8)

perfluoro(2-ethoxyethane)sulfonic acid (12)

perfluoro-3-methoxypropanoic acid (12)

perfluoro-4-methoxybutanoic acid (12)

perfluorobutanesulfonic acid (20)

perfluorobutanoic acid (12)

perfluorodecanoic acid (12)

perfluorododecanoic acid (12)

perfluoroheptanesulfonic acid (12)

perfluoroheptanoic acid (20)

perfluorohexanesulfonic acid (20)

perfluorohexanoic acid (12)

perfluorononanoic acid (20)

perfluorooctanesulfonic acid (20)

perfluorooctanoic acid (20)

perfluoropentanesulfonic acid (12)

perfluoropentanoic acid (12)

perfluorotetradecanoic acid (12)

perfluorotridecanoic acid (12)

perfluoroundecanoic acid (12)

profenofos (8)

quinoline (8)

strontium (12)

tebuconazole (8)

total microcystins (16)

Total Permethrin (8)

tribufos (8)

vanadium (12)

Sampling Facilities

MWD Intertie
Surface Water (SW)

Entry Point to Dist. SystemEntry Point to the Distribution System (EP)

La Sierra Reservoir
Multiple Sources (MX)

EPTDS from Sterling Pump Station (ADS/CDA II)Entry Point to the Distribution System (EP)

Mockingbird Chloramination Station
Multiple Sources (MX)

EPTDS from Riverside mixed w/ MWDEntry Point to the Distribution System (EP)

Distribution System
Multiple Sources (MX)

Site G - Gold Valley&IdaleonaDistribution System (DS)
Site D - Village Meadow & RidgefieldDistribution System (DS)
Site 6 - M-2 Box SpringsDistribution System (DS)
Site 9 - M-6 Lee LakeDistribution System (DS)
Site 3 - C-3 Santa RosaDistribution System (DS)
Site M - Spaulding & ColeDistribution System (DS)
Site 7 - M-3 Van BurenDistribution System (DS)
Site N - New Bridge & KrameriaDistribution System (DS)

Distribution System
Surface Water (SW)

DSMRT for MWDMaximum Residence Time (MR)

FAQ

Is Western Mun. Water District tap water safe to drink?

When was Western Mun. Water District last tested for water contamination?

The latest water samples were taken on January 10th, 2024.