Is Tohatchi, Mexican Springs, AZ Tap Water Safe to Drink?
Graded A, with 3 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
91.6/100
waterverge.com Tohatchi, Mexican Springs, AZ — Water Quality Report
Tohatchi, Mexican Springs's drinking water received a grade of A (91.6 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 1,669 residents using groundwater.
Lead levels were measured at 2.5 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 42 violations on record, including 1 health-based violation. 3 remain unresolved.
What to know about Tohatchi, Mexican Springs's water
Tohatchi, Mexican Springs ranks #44 out of 292 cities in Arizona for water quality, placing it above average in the state.
Tohatchi, Mexican Springs relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Tohatchi, Mexican Springs may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Tohatchi, Mexican Springs, AZ water safe to drink?
Tohatchi, Mexican Springs's drinking water has significant quality concerns based on EPA testing data. With a grade of A (91.6/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,669 residents using groundwater (wells).
Recent water quality updates for Tohatchi, Mexican Springs
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Tohatchi, Mexican Springs's water quality assessment. Grade: A (91.6/100).
Federal disaster declaration (FEMA DR-4620). Flood event — may have impacted local water infrastructure.
Contaminants: Total Haloacetic Acids (HAA5), TTHM.
Contaminants: Revised Total Coliform Rule.
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Federal disaster declaration (FEMA DR-3241). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Tohatchi, Mexican Springs's water supply.
Well within EPA limits.
Violation history
Tohatchi, Mexican Springs's water system has 42 total violations on record, including 1 health-based violation. 3 remain unresolved.
Flood & environmental risk
Apache County has experienced 6 federally declared disasters since 1970. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Tohatchi, Mexican Springs's water come from?
Tohatchi, Mexican Springs's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,669 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Tohatchi, Mexican Springs residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Tohatchi, Mexican Springs's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Tohatchi, Mexican Springs's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Flood & disaster history
Apache County has experienced 6 federally declared disasters since 1970. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
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. | 2.5 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Tohatchi, Mexican Springs compares by contaminant
Explore where Tohatchi, Mexican Springs ranks among all Arizona cities for specific contaminants.
Water source & infrastructure
Where Tohatchi, Mexican Springs's water comes from
Tohatchi, Mexican Springs's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by native american ownership and serves approximately 1,669 people through 1 water system.
Water systems serving Tohatchi, Mexican Springs
| System Name | PWSID | Population | Source |
|---|---|---|---|
| Tohatchi-Mexican Springs-Twin Lakes NTUA | NN3500237 | 1,669 | GW |
How Tohatchi, Mexican Springs compares
Full Arizona rankings →Tohatchi, Mexican Springs's score of 91.6/100 is above the average of 42/100 among major Arizona cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Arizona rankings →Learn more about your water
Guides and resources related to Tohatchi, Mexican Springs's water quality findings.
Frequently asked questions
Is Tohatchi, Mexican Springs, AZ tap water safe to drink?
Tohatchi, Mexican Springs's water quality earned a grade of A (91.6/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #44 out of 292 cities tested in Arizona.
What contaminants are in Tohatchi, Mexican Springs's water?
Lead was measured at 2.5 ppb (90th percentile). 42 violations are on record.
How is Tohatchi, Mexican Springs'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 Tohatchi, Mexican Springs?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Tohatchi, Mexican Springs's water come from?
Tohatchi, Mexican Springs's water is sourced from Groundwater. The city has 1 water system serving approximately 1,669 residents.
What health violations has Tohatchi, Mexican Springs's water system had?
Tohatchi, Mexican Springs has 1 health-based violation on record. The most recent violation was recorded in January 2020. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 3 violations remain unresolved.
Is Tohatchi, Mexican Springs's groundwater at risk of contamination?
Tohatchi, Mexican Springs uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 42 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Tohatchi, Mexican Springs's water compare to other cities?
Tohatchi, Mexican Springs ranks #44 out of 292 cities in Arizona (better than 85% of state cities) and #1595 out of 15744 cities nationally (90th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Tohatchi, Mexican Springs's small water system affect quality?
Tohatchi, Mexican Springs's system serves approximately 1,669 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 42 violations on record.