Is Joseph City, AZ Tap Water Safe to Drink?
Graded C+, with 41 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
69.7/100
waterverge.com Joseph City, AZ — Water Quality Report
Joseph City's drinking water received a grade of C+ (69.7 out of 100), indicating fair water quality. The city's 1 water system serves approximately 1,811 residents using groundwater.
Lead levels were measured at 0.0 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 195 violations on record, including 0 health-based violations. 41 remain unresolved.
What to know about Joseph City's water
Joseph City ranks #150 out of 292 cities in Arizona for water quality, placing it below average in the state.
Joseph City 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, Joseph City may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 11 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Joseph City, AZ water safe to drink?
Joseph City's drinking water has significant quality concerns based on EPA testing data. With a grade of C+ (69.7/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,811 residents using groundwater (wells).
Recent water quality updates for Joseph City
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Joseph City's water quality assessment. Grade: C+ (69.7/100).
Contaminants: Chlorine.
Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: Chlorine.
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 Joseph City's water supply.
Well within EPA limits.
Violation history
Joseph City's water system has 195 total violations on record, including 0 health-based violations. 41 remain unresolved. 11 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. Local water sources include Little Colorado River.
Where does Joseph City's water come from?
Joseph City's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,811 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Little Colorado River (river).
What Joseph City residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Joseph City'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.
Joseph City'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
Top industrial polluters within 10 miles of Joseph City
Industrial polluters nearby
Reported releases to surface water by facilities near Joseph City, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
RHINEHART OIL CO. HOLBROOK BULK PLANT HOLBROOK, AZ86025 | — | — | 9.8 mi |
CHOLLA POWER PLANT JOSEPH CITY, AZ86032 | — | — | 0.8 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D2 — severe droughtNavajo County is currently in D2 (severe drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
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. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Joseph City compares by contaminant
Explore where Joseph City ranks among all Arizona cities for specific contaminants.
Water source & infrastructure
Where Joseph City's water comes from
Joseph City'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 private ownership and serves approximately 1,811 people through 1 water system.
Water bodies near Joseph City
Joseph City is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Joseph City
| System Name | PWSID | Population | Source |
|---|---|---|---|
| JOSEPH CITY DWID | AZ0409016 | 1,811 | GW |
How Joseph City compares
Full Arizona rankings →Joseph City's score of 69.7/100 is above the average of 42/100 among major Arizona cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Arizona rankings →About Joseph City, AZ
Wikipedia →Joseph City is a census-designated place located in Navajo County, Arizona, United States. It is located on Interstate 40, approximately eighty miles east of Flagstaff and about thirty-five miles west of Petrified Forest National Park. In 2010, there were 1,386 inhabitants.
Learn more about your water
Guides and resources related to Joseph City's water quality findings.
Explore water quality across Navajo
Frequently asked questions
Is Joseph City, AZ tap water safe to drink?
Joseph City's water quality earned a grade of C+ (69.7/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #150 out of 292 cities tested in Arizona.
What contaminants are in Joseph City's water?
Lead was measured at 0.0 ppb (90th percentile). 195 violations are on record.
How is Joseph City'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 Joseph City?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Joseph City's water come from?
Joseph City's water is sourced from Groundwater. The city has 1 water system serving approximately 1,811 residents.
Is Joseph City's groundwater at risk of contamination?
Joseph City 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 195 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 Joseph City's water compare to other cities?
Joseph City ranks #150 out of 292 cities in Arizona (better than 49% of state cities) and #10876 out of 15744 cities nationally (31th percentile). The grade of C+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Joseph City's small water system affect quality?
Joseph City's system serves approximately 1,811 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 195 violations on record.