Los Angeles, CA tap water: what's in it in 2025
Serving 4M residents via Los Angeles Department of Water and Power · Los Angeles, CA drinking water is supplied by Los Angeles Department of Water and Power. EPA and utility monitoring commonly focus on issues such as Chromium-6 (hexavalent chromium), PFAS in some districts, Drought-driven water blending. Capital programs rotate through main replacements, corrosion-control adjustments, and treatment pilots (carbon, UV, membranes) while suburbs keep adding demand at the edges of the system. Pair this context with your address-specific EPA panel to see which upgrades line up with what was sampled most recently.
Los Angeles has significant water quality concerns including chromium-6 (hexavalent chromium). EPA legal limits are set based on treatment feasibility — not always on what independent health scientists consider safe. Certified filtration is strongly recommended for this water supply.
LA's water has one of the highest chromium-6 levels of any major US city -- a known carcinogen.
Multiple LADWP water districts have detected PFAS above EPA health advisory levels.
Water is blended from the Colorado River and local groundwater -- quality varies by district.
Only RO systems remove chromium-6 -- activated carbon does not.
Source: EPA UCMR5 national monitoring dataset · Testing period 2023–2025 · MCL = Maximum Contaminant Level (legally enforceable limit) · Health limit = EPA health advisory threshold
Based on Los Angeles's water profile above, here's the exact system we recommend — and why it's right for this water supply specifically.
COMMON QUESTIONS
Is Los Angeles tap water safe to drink in 2025?
Los Angeles water meets EPA legal standards, but meeting legal standards is not the same as being free of health concerns. EPA limits are set based on treatment feasibility, not always on what independent scientists consider safe. Los Angeles has chromium-6 (hexavalent chromium) which is a significant concern — certified filtration is strongly recommended.
Does Los Angeles water have PFAS?
EPA UCMR5 monitoring data for Los Angeles (water system CA1910067) is shown above. PFAS — sometimes called "forever chemicals" — are synthetic compounds that don't break down in the body. Only reverse osmosis systems or NSF 58-certified carbon block filters reliably remove PFAS from tap water. Standard pitcher filters do not remove PFAS.
Does Los Angeles water have lead?
Lead in tap water almost always comes from the pipes inside your home or building, not the treatment plant. Homes built before 1986 in Los Angeles are most at risk because they may have lead solder, brass fittings, or lead service lines. The EPA has no safe level for lead in children. An NSF/ANSI 53-certified filter or reverse osmosis system removes lead at the tap.
What water filter is best for Los Angeles?
For Los Angeles's water profile — chromium-6 (hexavalent chromium), pfas in some districts — a reverse osmosis system addresses the widest range of contaminants. Under-sink RO (Waterdrop G3P800, Aquasana SmartFlow) is the gold standard for homeowners. Renters can use a countertop RO like the Waterdrop D4 — zero installation required. Clearly Filtered pitchers are the best non-RO option for PFAS and lead.
How do I get my Los Angeles water tested?
For the most accurate results for your specific tap, use a certified mail-in lab test rather than relying on city-wide data. SimpleLab Tap Score tests for 100+ contaminants including PFAS, lead, arsenic, and nitrates. Results come with a detailed health assessment and filter recommendations. City-wide EPA data like what you see above is a strong baseline, but your home's plumbing can add contaminants after the water leaves the treatment plant.
As of October 2024, all US water utilities must publish a public inventory of their lead service lines — the pipes connecting the water main to your home. Even if your utility water tests clean at the treatment plant, lead can leach from these pipes into your tap. Homes built before 1986 are most at risk.
We'll notify you when new PFAS data, EPA violations, or contamination alerts drop for Los Angeles. One email, no spam, unsubscribe any time.
City-wide data is just the start. Enter your ZIP to see your exact water system's EPA report, PFAS levels, and violation history — then get the right filter for your home.
Fix My Water — Free →