01The verdict: is Red Mesa water safe?
Red Mesa's drinking water has significant quality concerns based on EPA testing data. With a grade of B- (72/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,023 residents using surface water (rivers, lakes, or reservoirs).
12 unresolved violations on record
EPA records show open compliance items for this system. Most are administrative, but unresolved items are worth watching.
See what was cited ↓Lead is well under the limit
90th-percentile lead is 1.0 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓9 violations in the last five years
Recent compliance history is the best predictor of future problems — the year-by-year record is below.
See the record ↓Red Mesa's drinking water received a grade of B- (72 out of 100), indicating fair water quality. The city's 1 water system serves approximately 1,023 residents using purchased surface water.
Lead levels were measured at 1.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 56 violations on record, including 13 health-based violations. 12 remain unresolved.
Red Mesa ranks #141 out of 271 cities in Arizona for water quality, placing it below average in the state. The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection. As a small community water system, Red Mesa may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities. The system has seen 9 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
02What's in Red Mesa's water
Every contaminant flagged in Red Mesa, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 1.0 | 15 | ppb | Inorganic | Safe |
Cities ranked by 90th-percentile lead PF PFAS in Arizona
Cities ranked by compounds detected Cu Copper in Arizona
Cities ranked by 90th-percentile copper
03Red Mesa's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 56 violations on record, including 13 health-based violations. 12 remain unresolved.
5 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▼ Down 0 ppb since 1993. Latest reading: 1 ppb (2025) — 7% of the action level. Sampled at higher-risk homes (90th percentile).
04Where Red Mesa's water comes from
Red Mesa's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Purchased Surface Water
Rivers, lakes, or reservoirs — more exposed to runoff, agriculture, and seasonal swings than groundwater.
Wholesale supplier
Multi-barrier treatment: coagulation, sedimentation, filtration, and disinfection to meet EPA standards.
1 system
1 water system (1 wholesaler), operated under native american ownership.
1,023 people
Residents served across Red Mesa's service area.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards. These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge. The system is operated by native american ownership and serves approximately 1,023 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| Red Mesa NTUA | NN4903017 | 1,023 | Purchased Surface Water |
05How Red Mesa compares
Scores for nearby Arizona cities on one line, with the average marked.
dashed line = Arizona average (41/100)
Red Mesa scores 72/100 — above the Arizona average of 41/100. It outscores 10 of 10 nearby cities. Full Arizona rankings →
37.5 / 100FTucson, AZ
38.1 / 100FMesa, AZ
40.6 / 100FChandler, AZ
40.5 / 100FGilbert, AZ
34.8 / 100FScottsdale, AZ
43 / 100
06What to do at home
Steps matched to what testing actually found in Red Mesa's water — not generic advice.
A basic carbon filter still helps
Red Mesa's water meets federal standards, but a simple carbon filter improves taste and adds a margin of safety against short-term issues.
Compare tested filters →Read your utility's annual report
Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.
How to read a CCR →Watch for Red Mesa alerts
We refresh EPA data monthly and surface new violations, advisories, and boil-water notices for your county on this page.
All water alerts →Frequently asked questions
Is Red Mesa, AZ tap water safe to drink?
Red Mesa's water quality earned a grade of B- (72/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #141 out of 271 cities tested in Arizona.
What contaminants are in Red Mesa's water?
Lead was measured at 1.0 ppb (90th percentile). 56 violations are on record.
How is Red Mesa's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Red Mesa?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Red Mesa's water come from?
Red Mesa's water is sourced from Purchased surface water. The city has 1 water system serving approximately 1,023 residents.
What health violations has Red Mesa's water system had?
Red Mesa has 13 health-based violations on record. The most recent violation was recorded in July 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 12 violations remain unresolved.
How does Red Mesa's water compare to other cities?
Red Mesa ranks #141 out of 271 cities in Arizona (better than 48% of state cities) and #10333 out of 15382 cities nationally (33th percentile). The grade of B- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Red Mesa's small water system affect quality?
Red Mesa's system serves approximately 1,023 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 56 violations on record.