Livermore
CA

Is Livermore, CA Tap Water Safe to Drink?

Livermore tap water meets federal Safe Drinking Water Act standards but 2 of 2 ZIP codes show detections above EPA health guidelines, primarily for lithium. A certified filter is recommended for households that want an additional layer of protection.

3Water systems
2ZIP codes
100%ZIPs above EPA guideline
Metro areaSan Francisco-Oakland-Fremont, CA
Latest data2025-11-18

Where Does Livermore Get Its Water?

Water in Livermore, CA is provided by 3 public water systems: CALIFORNIA WATER SERVICE - LIVERMORE, CITY OF LIVERMORE and LAWRENCE LIVERMORE NATIONAL LAB SITE 200.

How Is Livermore Tap Water Treated?

Treated water is disinfected using calcium hypochlorite and free chlorine and ozone. Treatment includes conventional treatment (coagulation, flocculation, and filtration), granular activated carbon filtration, groundwater disinfection, ion exchange, membrane filtration and post-ozone biofiltration.

What's in Livermore Tap Water?

The following contaminants were detected most frequently in Livermore public water systems. 2 of 2 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 25.1 µg/L 10 µg/L 2 ZIPs Above guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
HFPO-DA 0.005 µg/L — 0 ZIPs Within guideline
8:2 FTS 0.005 µg/L — 0 ZIPs Within guideline
11Cl-PF3OUdS 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for Livermore

Based on EPA monitoring data, 2 of 2 ZIP codes in Livermore have recorded detections above EPA health guidelines. Sensitive populations such as infants, pregnant individuals, and those with weakened immune systems may benefit from an additional layer of protection such as a certified point-of-use filter.

Best Broad-Spectrum Filters for This Water Profile

This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.

Waterdrop G3P600 Reverse Osmosis System
Under-sink RO system

8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.

See recommendations matched to your exact address: choose your ZIP code below.

Frequently Asked Questions about Livermore Tap Water

Is Livermore tap water safe to drink?

Livermore tap water meets Safe Drinking Water Act requirements but 2 of 2 ZIP codes show contaminant levels above EPA health-based guidelines. A certified point-of-use filter adds an extra layer of protection.

What contaminants are in Livermore tap water?

The most commonly detected contaminants in Livermore water systems include: lithium, PFTrDA, HFPO-DA. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does Livermore get its drinking water?

Livermore receives water from 3 public water systems, including CALIFORNIA WATER SERVICE - LIVERMORE.

Do I need a water filter in Livermore?

If your ZIP code is among those with detections above EPA health guidelines, choose a filter certified for the specific contaminants shown in your ZIP report. Reverse osmosis is generally the broadest option for PFAS, lithium, and many other dissolved contaminants.

How often is Livermore tap water tested?

Public water systems in Livermore are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2025-11-18.

Tap water reports by ZIP in Livermore

Water utilities serving Livermore, CA

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline.

Also covers / overlaps with