Is Los Angeles Tap Water Safe to Drink? (2026 Water Quality Review)
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Yes. Los Angeles tap water met every health-based standard in 2025, according to LADWP's own 2025 Drinking Water Quality Report, which covers January through December 2025. Its highest arsenic reading was 7.0 ppb against a limit of 10. Two things about LA water are not safety problems but can still bother you: hard water that changes with your neighborhood, and the chlorine taste of chloramine. Below are the 2025 numbers, which part of the city gets which water, what the city cannot test for you, and what I would put in, if anything.
Quick Answer
Yes, Los Angeles tap water is safe to drink by both federal and California standards. LADWP's 2025 Drinking Water Quality Report shows the system tested for 240 substances, ran more than 100,500 tests, and complied with every primary (health-based) drinking water standard. No lead service lines exist anywhere in the LADWP system.
- Where it comes from. In 2025, 52% was bought from the Metropolitan Water District (State Water Project and Colorado River water), 44% came down the Los Angeles Aqueduct from the Eastern Sierra, 1% was local groundwater and 3% was recycled water. See what the 2025 report found.
- Why people still filter. LA water is moderately hard to very hard (about 6 to 14 grains per gallon depending on your neighborhood's source), it is disinfected with chloramine, which some people taste, and a few parameters like arsenic and disinfection byproducts sit below legal limits but above stricter public health guidelines. See hardness by neighborhood and the chlorine taste.
- Local notices. The Pacific Palisades Do Not Drink notice after the January 2025 fire was lifted on March 7, 2025, and two storage tanks with high chlorate in January 2026 were drained and cleaned. See recent LA water notices.
- Your own building. The city's pipes carry no lead, but older plumbing inside a home can add it, and only a test at your own tap shows that. See lead in LA tap water.
What's in This Guide
What the 2025 LADWP report found
Every regulated substance LADWP found in 2025 met its legal limit, and no PFAS was detected in the water entering the city's pipes. The table is the city-wide or highest result for each one, from the report's own tables, next to the limit and what it means for you.
| Substance | LA result, 2025 | Legal limit | Percent of limit | What it means |
|---|---|---|---|---|
| Arsenic | 7.0 ppb highest; 3.3 ppb average at the Aqueduct plant | 10 ppb | 70% at the highest reading | Natural, from the Eastern Sierra; legal |
| Chloramine (total chlorine) | 1.7 mg/L | 4 mg/L | 43% | The disinfectant you taste |
| Trihalomethanes (TTHM) | 33.8 ppb | 80 ppb | 42% | Byproduct of disinfection |
| Copper at the tap (2023) | 529 ppb in the top 10% of homes tested | 1,300 ppb action level | 41% | Comes from household copper pipe |
| Fluoride | 0.7 mg/L average | 2 mg/L | 35% | Added on purpose for teeth |
| Bromate | 3.0 ppb average at the Weymouth plant; highest single result 12 ppb | 10 ppb | 30% of the average | Byproduct of ozone treatment at the MWD plants; the report lists it as meeting the standard |
| Lead at the tap (2023) | 3.9 ppb in the top 10% of homes tested | 15 ppb action level | 26% | Comes from a home's own plumbing; see lead |
| Haloacetic acids (HAA5) | 13.4 ppb | 60 ppb | 22% | Byproduct of disinfection |
| Nitrate | 1.4 mg/L highest | 10 mg/L | 14% | Under the detection limit at most sources |
| Chromium-6 | 0.6 ppb highest | 10 ppb (California) | 6% | Under 0.1 ppb at most sources |
| PFAS | None detected | 4 ppt each for PFOA and PFOS (federal) | 0% | Found in a few individual wells, never in the water entering the city's pipes |
| Total dissolved solids | 234 to 545 mg/L by source | 1,000 mg/L (taste standard) | 23% to 55% | Highest at the Weymouth and Diemer plants |
Arsenic is the one to understand. It comes from geothermal activity in the Owens Valley and Mono Basin, which releases natural arsenic into the creeks that feed the Los Angeles Aqueduct. Because the highest reading was over half the limit, LADWP has to print a notice about it, and it does. Water from the Metropolitan Water District plants tested under 2 ppb.
The Environmental Working Group's Tap Water Database counts 24 contaminants in LADWP test results through 2024, 9 of them above EWG's own health guidelines. Those guidelines are not legal limits. For arsenic, EWG uses California's public health goal of 0.004 ppb, a level set for essentially no lifetime risk, which no large surface water system in the state comes near. It is a fair reason to filter the water you drink. It is not a sign the water is unsafe.
How hard is the water in your neighborhood?
LA water runs from about 6 grains per gallon on the west side to nearly 14 in Eastern LA and the Harbor, because each part of the city gets a different blend. Aqueduct water from the Sierra is the softest (103 mg/L on average); water from the Metropolitan Water District's Weymouth and Diemer plants is the hardest (234 and 236 mg/L). Find your area, then read across.
| Where you live | Your water comes from | Hardness, 2025 average | How hard | Need a softener? |
|---|---|---|---|---|
| Santa Monica, Burbank, Glendale, Pasadena, Long Beach, Beverly Hills, Calabasas | Your own city's utility (Las Virgenes in Calabasas), not LADWP | Not in this report | Read your utility's report | Check your utility's hardness |
| Western LA: Westwood, Brentwood, Venice, Mar Vista, Palms, Westchester, Pacific Palisades | LA Aqueduct and State Water Project water | 103 mg/L (6.0 gpg) | Moderately hard | Optional, your call |
| Central LA: Hollywood, Koreatown, Mid City, Los Feliz, Silver Lake, Hancock Park, Watts | LA Aqueduct, State Water Project water and local wells | 103 to 116 mg/L (6.0 to 6.8 gpg) | Moderately hard | Optional, your call |
| San Fernando Valley: Van Nuys, Sherman Oaks, North Hollywood, Encino, Reseda, Northridge, Woodland Hills | LA Aqueduct plant, the Northern wells and the Jensen plant | 103 to 140 mg/L (6.0 to 8.2 gpg) | Moderately hard to hard | Yes in the harder areas |
| Eastern LA and the Harbor: Eagle Rock, Highland Park, Echo Park, Boyle Heights, El Sereno, San Pedro, Wilmington | Weymouth, Diemer and Jensen plants | 140 to 236 mg/L (8.2 to 13.8 gpg) | Hard to very hard | Yes |
To turn the report's mg/L into grains per gallon, divide by 17.1. A little over 7 grains per gallon is where a softener is recommended to protect your plumbing and water-using appliances; under that, it is your call. The bands are the U.S. Geological Survey's: 61 to 120 mg/L is moderately hard, 121 to 180 hard, over 180 very hard. Hard water is not a health issue; it is the scale in your water heater and the spots on your shower glass.
These are averages. LADWP says the sources for any area can change with operations, and it flags Culver City, West Hollywood, the L.A. City Strip and Harbor Gateway as places where they fluctuate. The Weymouth and Diemer plants ran as high as 280 mg/L (16.4 gpg) during 2025. For the number at your own tap, a lab test reports hardness along with lead. To check which utility serves your ZIP, the whole-house water filtration systems page looks up your utility's federal record by ZIP code, using data from ZipCheckup.
Why does LA water taste like chlorine?
LADWP disinfects with chloramine, which is chlorine with ammonia added so it lasts all the way through the city's pipes, and that is the pool taste and smell at your tap. In 2025 it averaged 1.7 mg/L, under the 4 mg/L maximum. The EPA says water with chloramine that meets its standards is safe for drinking, cooking and bathing; utilities have used it since the 1930s, and more than one in five Americans drink it.
Two groups do have to take it out: anyone on home dialysis, and anyone with a fish tank or pond, because chloramine harms fish. LADWP prints both warnings in its report.
For everyone else it is a taste question, and carbon answers it. People ask me whether carbon takes out chloramine as well as chlorine, and yes, it does. The carbon we use for most jobs is Centaur, a catalytic carbon from Calgon Carbon, which says it breaks down chloramine faster than standard activated carbon. A pitcher only fixes the glass you pour; when the taste is in the shower too, you want to filter every faucet, every fixture in the house. The filter choice is in which filter fits your LA water.
Is there lead in LA tap water?
LADWP's own pipes carry no lead, but when it tested 105 older homes in 2023, 3 of them were over the 15 ppb lead action level, because of the plumbing inside the house. LADWP finished checking every service line in October 2024 and found no lead service lines, and the State Water Board gave it a non-lead designation. More than 607,000 of its roughly 700,000 water meters have been replaced with lead-free meters.
The 2023 homes were picked on purpose: single-family houses built from 1982 to 1987 with their original copper pipe, the plumbing most likely to have lead solder joints. Across all 105, the top 10% came in at 3.9 ppb, well under the limit. Three homes were not. The next round was scheduled for the summer of 2026.
LADWP says it cannot control the plumbing and fixtures inside your building, and its advice is plain: drink and cook with cold water, run the tap for 1 to 2 minutes when water has been sitting, and use a filter certified to NSF/ANSI 53 for lead at the tap you drink from if you are concerned. If your home or building is old, test before you buy anything.
One tap test shows what your pipes add
Our city water test, $179, reports 47 results from your kitchen tap, including lead in parts per billion, copper, arsenic and hardness, from an accredited lab, and Aidan goes over the results with you. It does not test chloramine or disinfection byproducts; LADWP reports those. The advanced city water test, $279, adds trihalomethanes and 44 volatile organic compounds.
The lab finishes about 5 business days after it gets your sample, usually 2 to 4 weeks from the day you order.Recent LA water notices
The Pacific Palisades do-not-drink notice from the January 2025 fire was lifted on March 7, 2025. LADWP issued a boil water notice on January 8 and changed it to Do Not Drink on January 10, because fire-related contaminants could have entered the pipes. It flushed about 100 miles of main, tested 469 samples, and cleared the area in two stages, the last on March 7. LADWP's restoration page still asks Palisades owners to flush their plumbing before first use, with any softener or filter set to bypass first, and recommends replacing all the plumbing on the owner's side of the meter in a home damaged 50% or more.
The 2025 report discloses one more: in January 2026, LADWP found chlorate above California's notification level of 800 ppb in two storage tanks, one serving the Lookout Mountain area and one serving Tujunga, with a highest reading of 3,390 ppb. A notification level is a health advisory, not an enforceable limit. Both tanks were drained and cleaned, and LADWP says short, low-level exposure like this is generally not considered a significant health risk. Chlorate forms when the bleach-type disinfectant is stored warm or too long.
The federal record for LADWP, compiled by ZipCheckup from EPA data, lists 2 violations, 1 of them health-based, under the rule for disinfection byproducts. Separately, the report explains a single September 2023 sample in Griffith Park that read 136 ppb for trihalomethanes; that part of the system serves park visitors and staff, and no residents.
Which filter fits your LA water?
For safety on LADWP water you do not need a filter; for taste, scale or lead from your own plumbing, match the filter to the one you have.
| What bothers you | What I would put in | Price |
|---|---|---|
| Nothing | Nothing. The water met every health-based standard in 2025 | $0 |
| Chlorine taste or smell, at the tap and in the shower | A whole-house carbon tank: the Clack 2.5 non-backwashing carbon filter with Centaur carbon | $1,995 |
| Chlorine taste plus hard water (the harder Valley areas, Eastern LA, the Harbor) | Carbon tank first, then a softener: the 1.5 carbon and 48,000 grain package for 1 to 4 people, or the 2.5 carbon and 64,000 grain package for 5 or 6 | $3,195 or $3,795 |
| Only the water you drink and cook with | An under-sink Pure-75 reverse osmosis system at the kitchen faucet | $595 |
| You rent and cannot install anything | A shower head filter, a pitcher, or a faucet filter | Any hardware store |
On city water I use a carbon tank that does not backwash. A caller in Calabasas asked me why, because it did not make sense to him. There is no reason for a carbon tank to backwash on city water: it is just absorbing the chlorine and the chlorine byproducts, there is no iron or sediment to wash out, and backwashing is just a waste of water and energy. I live on city water here in Maryland, and I have the same system: a carbon tank first to take out the chlorine and chloramines, then a softener with 10% crosslink resin. You can safely take a drink from any faucet, and it is chlorine-free.
Reverse osmosis makes good water at one faucet, but it wastes about 2 gallons to make a gallon and it does not make it fast. That is why I steer most homeowners to the carbon tank and keep reverse osmosis for drinking water only.
Size the carbon tank by the people in the house: a 1.5 cubic foot tank for 2 to 4 people, a 2.5 for 4 or more. In the carbon and softener packages the softener sets the size, which is why the 1.5 package covers 1 to 4 people on water up to about 15 grains. For a family of 4 or 5, the carbon lasts about 4 to 5 years and costs about $800 to replace. To check it, test for chlorine after the tank; when chlorine comes through, the carbon is spent.
What ships with the Clack 2.5: the tank, the Clack head and bypass valve, a fill funnel, and 2.5 cubic feet of Centaur carbon in two 1 cubic foot bags and one 1/2 cubic foot bag. The tank ships empty, and the carbon is loaded into it at install. Plumbing fittings are not included. In the packages, the softener also ships empty with its resin in separate bags, and drain tubing and salt are not included. Shipping is free to the lower 48 states; to California it is about 4 days on the truck from Ohio.
I recommend having a plumber put it in, and I am a phone call away for your plumber. The carbon tank alone has no drain line and no electricity, just an inlet and an outlet on the cold main, so it is about an hour or two of a plumber's time. A package is two tanks in a set order, carbon first, and the softener needs a 1/2 inch drain line with an air gap, an outlet and its settings, so plan on 3 to 4 hours for both. If you have done some plumbing and would rather do it yourself, text me with any questions. For the whole city water picture beyond LA, see the City Water Treatment Guide.
Text Aidan your ZIP code
Send your ZIP code, how many people live in the house, and what bothers you. Aidan will tell you which tank fits, or that you do not need one.
8 AM to 5 PM Eastern, seven days a week. A real person, not a call center.Frequently asked questions
Can you drink tap water in an LA hotel?
Yes. A hotel inside the LADWP service area gets the same water as the homes around it; the only difference is the building's own pipes. For any tap that has sat overnight, LADWP's advice is to run the cold water for 1 to 2 minutes first and to drink cold water only.
Is it safe to drink tap water in California?
It depends on the utility, not the state. Every utility publishes its own annual water quality report, and even around Los Angeles, Santa Monica, Burbank, Glendale, Pasadena, Long Beach and Beverly Hills each run their own water. Read the report for the utility on your bill.
How hard is the water in Long Beach?
Long Beach is not on LADWP; Long Beach Utilities runs its own water, so the LA table on this page does not apply. Its annual water quality report gives the hardness; if it is in mg/L, divide by 17.1 for grains per gallon.
Do water filters actually remove lead?
The right one does. LADWP's own advice is a filter certified to NSF/ANSI 53 for lead at the tap you drink from, so check that certification on whatever you buy. Test first: if your tap shows no lead, you do not need a lead filter.
How do I find out my water hardness level?
Your utility's annual report gives the hardness; if it is in mg/L, divide by 17.1 for grains per gallon. For the number at your own tap, a lab test reports it, and a hardware-store hardness strip gives a rough check.
Is it okay to drink tap water without a filter?
On LADWP water, yes. It met every health-based standard in 2025. A filter is for taste, hard water, or lead from your own plumbing, which is why a test of your own tap should come before you buy one.
Aidan Walsh
Co-owner & Residential Water Treatment Specialist, Mid Atlantic WaterAidan Walsh has spent 32 years in residential water treatment, the first stretch of it installing and servicing well systems before Mid Atlantic Water became an online supplier. Mid Atlantic Water is a family company; every recommendation on this site is based on what actually failed in the field and what fixed it. If you have a question this page did not answer, call 800-460-5810 or text him at 443-277-2204.
Aidan answers calls and texts 8 AM to 5 PM Eastern, every day.Number copied. Text it from your phone: 443-277-2204.