Fluoride in San Fernando Valley Tap Water: What the 2024 LADWP CCR Shows About Levels, Standards, and Filter Selection

LADWP has added fluoride to its San Fernando Valley water supply since 2007. The utility targets 0.7 mg/L, the level the U.S. Department of Health and Human Services recommends for community water. The 2024 LADWP Consumer Confidence Report shows detected fluoride well below the EPA primary limit of 4.0 mg/L. Most SFV homeowners have two practical questions: how current levels compare to the various standards, and whether a home filter removes fluoride. This article answers both. It puts EPA, California, and HHS standards side by side in one table. It also identifies which filter types actually reduce fluoride.

How fluoride gets into SFV tap water

Fluoride gets into SFV tap water two ways. First, the source water already contains some. Second, LADWP adds more. The Colorado River Aqueduct water usually has natural fluoride below 0.5 mg/L. State Water Project water and local wells carry small amounts too.

California passed AB 733 in 1995. That law required large water systems to add fluoride when funding was available. LADWP started in 2007. The target is 0.7 mg/L. In 2015, the U.S. Public Health Service set that as the optimal level for preventing tooth decay. It also helps limit the risk of dental fluorosis (HHS, 2015).

Fluoride standards reference table

Five standards apply to fluoride in SFV tap water. Each comes from a different authority and serves a different purpose. The table below shows them all.

How to read the LADWP 2024 Consumer Confidence Report for fluoride

The LADWP 2024 CCR covers 2023 monitoring data. It is available at ladwp.com/water-quality. Find fluoride in the regulated contaminant table. It shows the detected level, the MCL, and the MCLG. For fluoride, both are 4.0 mg/L. If the detected level is below the MCL, LADWP is in compliance.

LADWP doses the water to hit its 0.7 mg/L target per HHS guidance. The level in the CCR is the added dose plus the natural fluoride in the source water. Both the Colorado River Aqueduct and State Water Project carry some natural fluoride. That is usually below 0.5 mg/L. The CCR shows the yearly average and range at system sampling points. LADWP also reports fluoride data to the EPA's SDWIS database. Search it at sdwis.epa.gov using LADWP's system ID CA1910067.

Which home filtration systems reduce fluoride

Not all water filters remove fluoride. Many homeowners assume they do. The NSF certification on the product box is the clearest way to check. Different certification numbers cover different contaminants.

Who should consider reducing fluoride at the tap

For most SFV households, LADWP levels are within the HHS range and below all regulatory limits. Most people do not need to act. A few situations lead some homeowners to add fluoride reduction:

• Infant formula preparation. Using fluoridated tap water to mix formula is generally acceptable. Some caregivers choose to use low-fluoride water for babies under 12 months to keep total fluoride intake down. The CDC treats this as a personal choice, not a safety requirement at LADWP's delivered levels (CDC FAQ on fluoride).
• Dental fluorosis concern. Dental fluorosis is cosmetic spotting of tooth enamel that can occur when children under 8 take in too much fluoride during tooth development. At LADWP's 0.7 mg/L target, HHS and CDC guidance puts the risk of moderate or severe fluorosis as low. Families with concerns may choose a point-of-use RO system for drinking and cooking water.
• Natural well water in the SFV. Homes in Chatsworth, West Hills, and Agoura Hills may use private wells rather than the LADWP system. Natural fluoride in SFV groundwater varies by location. If you are on a private well, have your water tested by a certified lab. The State Water Board keeps a list of approved labs at waterboards.ca.gov/drinking_water/certlic/labs.

Where to find the primary fluoride data for LADWP

Every figure in this article comes from public government sources. Here they are:

• LADWP 2024 Consumer Confidence Report: ladwp.com/water-quality. Annual report on all regulated contaminants. Shows detected levels, MCLs, and MCLGs. Published each year by July 1 for the prior calendar year.
• EPA National Primary Drinking Water Regulations: epa.gov/dwstandardsregulations. The federal MCL of 4.0 mg/L for fluoride and related health data.
• EPA Secondary Drinking Water Standards: epa.gov/sdwa/secondary-drinking-water-standards-guidance-nuisance-chemicals. The SMCL of 2.0 mg/L and cosmetic/aesthetic guidance for fluoride.
• HHS 2015 Fluoride Recommendation: hhs.gov. The 0.7 mg/L target for community water. Updated from the prior 0.7-1.2 mg/L range.
• California OEHHA Public Health Goal for Fluoride: oehha.ca.gov/water/public-health-goal/fluoride. California's non-enforceable health-protective target of 1.0 mg/L.
• NSF Certified Drinking Water Treatment Products: nsf.org. Use this to check if a specific filter is certified to reduce fluoride.

Sources cited: LADWP 2024 Consumer Confidence Report; EPA National Primary Drinking Water Regulations (fluoride MCL 4.0 mg/L); EPA Secondary Drinking Water Standards (fluoride SMCL 2.0 mg/L); HHS 2015 Recommendation for Fluoride in Drinking Water (0.7 mg/L); California OEHHA Public Health Goal for Fluoride (1.0 mg/L); CDC Frequently Asked Questions About Fluoride; NSF International: Drinking Water Treatment Systems. Last updated: September 14, 2026.