Is Hopi High School, AZ Tap Water Safe to Drink?
Graded D+, with 42 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
50/100
waterverge.com Hopi High School, AZ — Water Quality Report
Hopi High School's drinking water received a grade of D+ (50 out of 100), indicating poor water quality. The city's 1 water system serves approximately 1,150 residents using groundwater.
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 234 violations on record, including 46 health-based violations. 42 remain unresolved.
What to know about Hopi High School's water
Hopi High School ranks #194 out of 292 cities in Arizona for water quality, placing it below average in the state.
Hopi High School 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, Hopi High School may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 76 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Hopi High School, AZ water safe to drink?
Hopi High School's drinking water has significant quality concerns based on EPA testing data. With a grade of D+ (50/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,150 residents using groundwater (wells).
Recent water quality updates for Hopi High School
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Hopi High School's water quality assessment. Grade: D+ (50/100).
3 health-based. Contaminants: Stage 1 Disinfectants and Disinfection Byproducts Rule, Fluoride, Arsenic.
1 health-based. Contaminants: Fluoride, Arsenic, Public Notice.
Contaminants: Arsenic, Fluoride.
Federal disaster declaration (FEMA DR-4620). Flood event — may have impacted local water infrastructure.
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 Hopi High School's water supply.
Well within EPA limits.
Violation history
Hopi High School's water system has 234 total violations on record, including 46 health-based violations. 42 remain unresolved. 76 violations were issued in the last 5 years.
Flood & environmental risk
Navajo County has experienced 8 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 Hopi High School's water come from?
Hopi High School's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,150 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Hopi High School residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Hopi High School'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.
Hopi High School'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
Navajo County has experienced 8 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. | 1.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Hopi High School compares by contaminant
Explore where Hopi High School ranks among all Arizona cities for specific contaminants.
Water source & infrastructure
Where Hopi High School's water comes from
Hopi High School'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 federal ownership and serves approximately 1,150 people through 1 water system.
Water systems serving Hopi High School
| System Name | PWSID | Population | Source |
|---|---|---|---|
| Hopi High School - BIA | 090400395 | 1,150 | GW |
How Hopi High School compares
Full Arizona rankings →Hopi High School's score of 50/100 is above the average of 42/100 among major Arizona cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Arizona rankings →About Hopi High School, AZ
Wikipedia →Keams Canyon is a census-designated place (CDP) in Navajo County, Arizona, United States, on the Hopi Reservation. The population was 304 at the 2010 census.
Learn more about your water
Guides and resources related to Hopi High School's water quality findings.
Frequently asked questions
Is Hopi High School, AZ tap water safe to drink?
Hopi High School's water quality earned a grade of D+ (50/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #194 out of 292 cities tested in Arizona.
What contaminants are in Hopi High School's water?
Lead was measured at 1.0 ppb (90th percentile). 234 violations are on record.
How is Hopi High School'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 Hopi High School?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Hopi High School's water come from?
Hopi High School's water is sourced from Groundwater. The city has 1 water system serving approximately 1,150 residents.
What health violations has Hopi High School's water system had?
Hopi High School has 46 health-based violations on record. The most recent violation was recorded in October 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 42 violations remain unresolved.
Is Hopi High School's groundwater at risk of contamination?
Hopi High School 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 234 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 Hopi High School's water compare to other cities?
Hopi High School ranks #194 out of 292 cities in Arizona (better than 34% of state cities) and #13159 out of 15744 cities nationally (16th percentile). The grade of D+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Hopi High School's small water system affect quality?
Hopi High School's system serves approximately 1,150 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 234 violations on record.