Chula Vista
CA

Is Chula Vista, CA Tap Water Safe to Drink?

Chula Vista tap water meets federal Safe Drinking Water Act standards but 5 of 5 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.

4Water systems
5ZIP codes
100%ZIPs above EPA guideline
Metro areaSan Diego-Chula Vista-Carlsbad, CA
Latest data2025-07-17

Where Does Chula Vista Get Its Water?

Water in Chula Vista, CA is provided by 4 public water systems: CAL-AM WATER CORONADO, OTAY WATER DISTRICT, SAN DIEGO, CITY OF and SWEETWATER AUTHORITY.

How Is Chula Vista Tap Water Treated?

Treated water is disinfected using free chlorine and calcium hypochlorite and chloramines and ozone. Treatment includes air stripping, conventional treatment (coagulation, flocculation, and filtration), direct filtration, groundwater disinfection and membrane filtration.

What's in Chula Vista Tap Water?

The following contaminants were detected most frequently in Chula Vista public water systems. 5 of 5 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 42.6 µg/L 10 µg/L 5 ZIPs Above guideline
PFBA 0.0089 µg/L — 2 ZIPs Within guideline
PFOA 0.0079 µg/L — 2 ZIPs Within guideline
PFBS 0.0075 µg/L — 2 ZIPs Within guideline
PFHxS 0.0071 µg/L — 2 ZIPs Within guideline

Health Risk Profile for Chula Vista

Based on EPA monitoring data, 5 of 5 ZIP codes in Chula Vista 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 Chula Vista Tap Water

Is Chula Vista tap water safe to drink?

Chula Vista tap water meets Safe Drinking Water Act requirements but 5 of 5 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 Chula Vista tap water?

The most commonly detected contaminants in Chula Vista water systems include: lithium, PFBA, PFOA. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does Chula Vista get its drinking water?

Chula Vista receives water from 4 public water systems, including CAL-AM WATER CORONADO.

Do I need a water filter in Chula Vista?

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 Chula Vista tap water tested?

Public water systems in Chula Vista 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 2025-07-17.

Tap water reports by ZIP in Chula Vista

Water utilities serving Chula Vista, 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