UpTown Cares

Los Angeles County, CA

Water Filtration in Northridge, CA

Northridge, Granada Hills, Porter Ranch, and Chatsworth sit at the northwest corner of the LADWP service area, near the Chatsworth and Porter Ranch groundwater fields. The local blend can lean harder on basin groundwater than the southern Valley, which shifts the mineral load by ZIP and by season. That variability is exactly why every install starts with a free in-home test rather than a city-average assumption.

Call (213) 838-9330Schedule a free water test

The water supply in Northridge

Northridge is served by Los Angeles Department of Water and Power. Northridge, Granada Hills, Porter Ranch, and Chatsworth are on the LADWP distribution system, the same blended supply of State Water Project water, Los Angeles Aqueduct deliveries, Colorado River water through Metropolitan Water District, and San Fernando Basin groundwater that serves the rest of the Valley. Disinfection uses chloramine. This part of the Valley sits closer to the Porter Ranch and Chatsworth well fields, which contribute more groundwater to the local blend during high-demand periods.

Common local concerns

  • Chloramine disinfection residual from LADWP treatment
  • Hardness varies with the local groundwater contribution from the Chatsworth and Porter Ranch well fields
  • TTHM 34.4 ppb HLRAA and HAA5 14.9 ppb per the LADWP 2024 CCR
  • Arsenic 3.5 ppb average across LADWP distribution (MCL 10)

Read the Los Angeles Department of Water and Power water-quality page

Services available in Northridge

Cities covered under Northridge

Northridge, Granada Hills, Porter Ranch, Chatsworth.

Nearby SFV areas we cover

UpTown Cares is a for-profit clean-water initiative. The Peggy Beatrice Foundation is a separate 501(c)(3) nonprofit; UpTown Cares is its proud partner, not part of the 501(c)(3).

Author: UpTown Cares Team. Service area: Los Angeles County, California.