Water system

City of Mesa Water Resources

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Arizona EPA ID AZ0407095 466,000 people Surface water
EPA name: Mesa City of

What this means for you

Is it safe to drink right now?
Based on the latest EPA data, City of Mesa Water Resources has no unresolved health-based violations from the past year. Water that meets federal standards is generally considered safe to drink for most healthy people.
Should I use a filter?
Optional. Nothing in this data strongly calls for one. Many people still filter for chlorine taste and odor.
What kind of filter?
For taste and odor (chlorine/chloramine), an NSF/ANSI 42 pitcher or faucet filter is enough. See matched standards and product picks.

This is general information from public EPA data, not medical advice. Lead often comes from a home’s own pipes, so only a test of your tap can tell your exposure. If you are pregnant, caring for an infant, or have a weakened immune system, ask your doctor or health department.

Summary: No health-based violations in the last 5 years; 25 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
EPA data snapshot 2026Q3. Grade is TapWaterZip's own score — see methods.

PFAS (“forever chemicals”), EPA UCMR 5

ChemicalHighest location averageHighest single sampleFederal limitDetections/samples
PFBS11.5 ppt15.2 pptnone10/70
PFHxS9 ppt9.3 ppt10 ppt (proposed repeal)4/70
PFHxA1.6 ppt3.2 pptnone1/70
4 PFAS tested and not detected

PFNA, HFPO-DA, PFOS, PFOA (70 samples each, below EPA minimum reporting levels).

Hazard Index (PFHxS, PFNA, GenX, PFBS): 0.9 (limit 1.0, proposed for repeal).

Averages are per sampling location across UCMR 5 samples (non-detects counted as 0), approximating the rule’s running annual average. Not an official compliance determination; PFOA/PFOS MCL compliance begins April 26, 2029.

Lithium (also tested in UCMR 5, not a PFAS; no federal limit): highest location average 519.5 ppb.

Lead and copper

Lead 90th percentile5 ppb2024-12-31
Current action level15 ppbLCRI lowers to 10 ppb on Nov 1, 2027

Violations (last 5 years)

BeganTypeContaminant / ruleStatus
2025-08-01Missed or late testingRevised Total Coliform RuleResolved
2025-03-01Missed or late testing/reportingBromateResolved
2025-02-01Missed or late testing/reportingBromateResolved
2023-01-01Missed or late testing/reportingCarbon tetrachlorideResolved
2023-01-01Missed or late testing/reportingo-DichlorobenzeneResolved
2023-01-01Missed or late testing/reportingEthylbenzeneResolved
2023-01-01Missed or late testing/reportingTetrachloroethyleneResolved
2023-01-01Missed or late testing/reportingTolueneResolved
2023-01-01Missed or late testing/reportingVinyl chlorideResolved
2023-01-01Missed or late testing/reportingp-DichlorobenzeneResolved
2023-01-01Missed or late testing/reportingDi(2-ethylhexyl) phthalateResolved
2023-01-01Missed or late testing/reportingCHLOROBENZENEResolved
2023-01-01Missed or late testing/reporting1,2,4-TrichlorobenzeneResolved
2023-01-01Missed or late testing/reporting1,1-DichloroethyleneResolved
2023-01-01Missed or late testing/reporting1,1,1-TrichloroethaneResolved
2023-01-01Missed or late testing/reportingXylenes, TotalResolved
2023-01-01Missed or late testing/reportingcis-1,2-DichloroethyleneResolved
2023-01-01Missed or late testing/reportingBenzeneResolved
2023-01-01Missed or late testing/reportingTrichloroethyleneResolved
2023-01-01Missed or late testing/reportingStyreneResolved
2023-01-01Missed or late testing/reporting1,2-DichloropropaneResolved
2023-01-01Missed or late testing/reporting1,2-DichloroethaneResolved
2023-01-01Missed or late testing/reportingtrans-1,2-DichloroethyleneResolved
2023-01-01Missed or late testing/reportingDICHLOROMETHANEResolved
2023-01-01Missed or late testing/reporting1,1,2-TrichloroethaneResolved

Filters matched to this water

FILTER PICKS

Look for filters certified (NSF, IAPMO or WQA) to these standards for the specific contaminant. Buttons open the maker’s page or an Amazon search; use “Check NSF listing” to verify a model’s claims. No affiliate links yet — grades are never sold.

PFAS (other)

NSF/ANSI 58 (RO, total PFAS claim)NSF/ANSI 53 (check claim)
RO system with total-PFAS claim ~$300–600
Prefer units whose NSF/ANSI 58 listing covers total PFAS or named PFAS.
Search on Amazon →
Check NSF listing · Not an affiliate link · disclosure
Certified filter (check contaminant list) varies
Open the NSF listing and confirm the exact chemical before you buy.
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Lead

NSF/ANSI 53NSF/ANSI 58 (RO)
Aquasana Claryum 3-Stage Under Sink ~$280–350
Under-sink carbon filter; check its listing for lead and PFOA/PFOS claims.
View on Aquasana →
Check NSF listing · Not an affiliate link · disclosure
Waterdrop Undersink WD-UA ~$80–120
Undersink carbon block; verify the specific contaminant claims.
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Waterdrop G3 / G3P600 RO ~$300–500
Tankless RO; RO broadly reduces nitrate, fluoride, arsenic and many PFAS — confirm the certificate lists yours.
Search on Amazon →
Check NSF listing · Not an affiliate link · disclosure

Chlorine/chloramine taste

NSF/ANSI 42
Aquasana Clean Water Pitcher ~$35
Pitcher for chlorine taste/odor; check the NSF/ANSI 42 listing for the exact model.
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Check NSF listing · Not an affiliate link · disclosure
Brita Elite Filter ~$20–40
Common faucet/pitcher option; confirm the 42 claim on the box.
View on Brita →
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Annual water quality report

Read City of Mesa Water Resources’s Consumer Confidence Report (CCR) — the utility’s own annual water quality report.

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