Is St David, AZ Tap Water Safe to Drink?
Graded D+, with 50 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
50/100
waterverge.com St David, AZ — Water Quality Report
St David's drinking water received a grade of D+ (50 out of 100), indicating poor water quality. The city's 3 water systems serve approximately 1,445 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 313 violations on record, including 22 health-based violations. 50 remain unresolved.
What to know about St David's water
St David ranks #193 out of 292 cities in Arizona for water quality, placing it below average in the state.
St David 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, St David may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 15 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is St David, AZ water safe to drink?
St David'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 3 water systems serve approximately 1,445 residents using groundwater (wells).
Recent water quality updates for St David
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into St David's water quality assessment. Grade: D+ (50/100).
Contaminants: Public Notice.
2 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-3241). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-977). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for St David's water supply.
Well within EPA limits.
Violation history
St David's water system has 313 total violations on record, including 22 health-based violations. 50 remain unresolved. 15 violations were issued in the last 5 years.
Flood & environmental risk
Cochise County has experienced 4 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 St David's water come from?
St David's drinking water comes from groundwater (wells), supplied by 3 water systems serving approximately 1,445 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What St David residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in St David'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.
St David'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
Drought conditions
D1 — moderate droughtCochise County is currently in D1 (moderate 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
Cochise County has experienced 4 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 St David compares by contaminant
Explore where St David ranks among all Arizona cities for specific contaminants.
Water source & infrastructure
Where St David's water comes from
St David'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 1,445 people through 3 water systems.
Water systems serving St David
| System Name | PWSID | Population | Source |
|---|---|---|---|
| ST DAVID DWID | AZ0402039 | 1,255 | GW |
| STRATMAN WATER COMPANY | AZ0402075 | 105 | GW |
| SWEET SPRINGS MOBILE HOME PARK | AZ0402327 | 85 | GW |
How St David compares
Full Arizona rankings →St David'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 St David, AZ
Wikipedia →Colorado City is a town in Mohave County, Arizona, United States, and is located in a region known as the Arizona Strip. The population was 2,478 at the 2020 census. The Town of Colorado City, Arizona, incorporated in September 1985, was established by residents seeking local self-government and essential services. It is notable as a colony of Mormon polygamists, together with neighboring Hildale, Utah.
Learn more about your water
Guides and resources related to St David's water quality findings.
Explore water quality across Cochise
Frequently asked questions
Is St David, AZ tap water safe to drink?
St David's water quality earned a grade of D+ (50/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #193 out of 292 cities tested in Arizona.
What contaminants are in St David's water?
Lead was measured at 0.0 ppb (90th percentile). 313 violations are on record.
How is St David'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 St David?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does St David's water come from?
St David's water is sourced from Groundwater. The city has 3 water systems serving approximately 1,445 residents.
What health violations has St David's water system had?
St David has 22 health-based violations on record. The most recent violation was recorded in December 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 50 violations remain unresolved.
Is St David's groundwater at risk of contamination?
St David 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 313 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 St David's water compare to other cities?
St David ranks #193 out of 292 cities in Arizona (better than 34% of state cities) and #13142 out of 15744 cities nationally (17th percentile). The grade of D+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.