Is Mesa, AZ Tap Water Safe to Drink?
Mesa tap water meets federal Safe Drinking Water Act standards but 16 of 17 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.
Where Does Mesa Get Its Water?
Water in Mesa, AZ is provided by 8 public water systems: MESA CITY OF, GILBERT, TOWN OF, PHOENIX CITY OF, Salt River Public Works, SCOTTSDALE CITY OF, Casino Arizona, Casino Arizona Talking Stick (CATS) and Talking Stick Resort.
How Is Mesa Tap Water Treated?
Treated water is disinfected using chloramines and free chlorine and ozone. Treatment includes air stripping, conventional treatment (coagulation, flocculation, and filtration), granular activated carbon filtration, groundwater disinfection, membrane filtration and post-ozone biofiltration.
What's in Mesa Tap Water?
The following contaminants were detected most frequently in Mesa public water systems. 16 of 17 ZIP codes showed detections above EPA health guidelines.
| Contaminant | Peak detected | EPA guideline | ZIPs detected | Status |
|---|---|---|---|---|
| lithium | 514 µg/L | 10 µg/L | 16 ZIPs | Above guideline |
| PFTrDA | 0.007 µg/L | — | 0 ZIPs | Within guideline |
| 11Cl-PF3OUdS | 0.005 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 |
Health Risk Profile for Mesa
Based on EPA monitoring data, 16 of 17 ZIP codes in Mesa 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.
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 Mesa Tap Water
Is Mesa tap water safe to drink?
Mesa tap water meets Safe Drinking Water Act requirements but 16 of 17 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 Mesa tap water?
The most commonly detected contaminants in Mesa water systems include: lithium, PFTrDA, 11Cl-PF3OUdS. See the ZIP-level reports for exact measurements and EPA guideline comparisons.
Where does Mesa get its drinking water?
Mesa receives water from 8 public water systems, including MESA CITY OF.
Do I need a water filter in Mesa?
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 Mesa tap water tested?
Public water systems in Mesa 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 2025-12-01.
Tap water reports by ZIP in Mesa
- 85201 - Phoenix CCD, Mesa tap water report Higher concern
- 85202 - Phoenix CCD, Mesa tap water report Higher concern
- 85203 - Salt River CCD, Mesa tap water report Higher concern
- 85204 - Phoenix CCD, Mesa tap water report Higher concern
- 85205 - Phoenix CCD, Mesa tap water report Higher concern
- 85206 - Phoenix CCD, Mesa tap water report Higher concern
- 85207 - Phoenix CCD, Mesa tap water report Higher concern
- 85208 - Phoenix CCD, Mesa tap water report Higher concern
- 85209 - Phoenix CCD, Mesa tap water report Higher concern
- 85210 - Phoenix CCD, Mesa tap water report Higher concern
- 85211 - Mesa tap water report Higher concern
- 85212 - Chandler CCD, Mesa tap water report Higher concern
- 85213 - Phoenix CCD, Mesa tap water report Higher concern
- 85214 - Mesa tap water report Higher concern
- 85215 - Tonto National Forest CCD, Mesa tap water report Higher concern
- 85256 - Scottsdale, Mesa tap water report Higher concern
- 85277 - Mesa tap water report No recent data
Water utilities serving Mesa, AZ
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- MESA CITY OFAction advised
- SALT RIVER PUBLIC WORKSAction advised
- Tri-Cities Monitoring Well-5 (WQP)No recent federal sampling
Also covers / overlaps with
- Phoenix CCD, AZ · Township
- Salt River CCD, AZ · Township
- Chandler CCD, AZ · Township
- North Pinal CCD, AZ · Township
- Scottsdale, AZ · Community
- Tonto National Forest CCD, AZ · Township