Is Coolidge, AZ Tap Water Safe to Drink?
Graded D+, with 99 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
50/100
waterverge.com Coolidge, AZ — Water Quality Report
Coolidge's drinking water received a grade of D+ (50 out of 100), indicating poor water quality. The city's 3 water systems serve approximately 769 residents using groundwater.
Lead levels were measured at 1.5 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 724 violations on record, including 18 health-based violations. 99 remain unresolved.
What to know about Coolidge's water
Coolidge ranks #197 out of 292 cities in Arizona for water quality, placing it below average in the state.
Coolidge 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, Coolidge may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 50 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Coolidge, AZ water safe to drink?
Coolidge'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 769 residents using groundwater (wells).
Recent water quality updates for Coolidge
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Coolidge's water quality assessment. Grade: D+ (50/100).
Contaminants: Public Notice, Consumer Confidence Rule.
Contaminants: Public Notice.
Contaminants: Revised Total Coliform Rule, Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-4203). 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 Coolidge's water supply.
Well within EPA limits.
Violation history
Coolidge's water system has 724 total violations on record, including 18 health-based violations. 99 remain unresolved. 50 violations were issued in the last 5 years.
Flood & environmental risk
Maricopa County has experienced 10 federally declared disasters since 1966. 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 Salt River.
Where does Coolidge's water come from?
Coolidge's drinking water comes from groundwater (wells), supplied by 3 water systems serving approximately 769 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Salt River (river).
What Coolidge residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Coolidge'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.
Coolidge'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 Coolidge
Industrial polluters nearby
Reported releases to surface water by facilities near Coolidge, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
WESTERN EMULSIONS COOLIDGE COOLIDGE, AZ85128 | — | — | 1.2 mi |
BEST BLOCK - COOLIDGE AZ PLANT COOLIDGE, AZ85128 | — | — | 6.1 mi |
CALPORTLAND CO COOLIDGE- DIABLO COOLIDGE, AZ85128 | — | — | 6.1 mi |
MARTIN MARIETTA ARIZONA LLC - COOLIDGE PLANT FLORENCE, AZ85132 | — | — | 6.4 mi |
MESA FULLY FORMED LLC-COOLIDGE COOLIDGE, AZ85228 | — | — | 2.7 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D2 — severe droughtPinal 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
Maricopa County has experienced 10 federally declared disasters since 1966. 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. | 1.5 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Coolidge compares by contaminant
Explore where Coolidge ranks among all Arizona cities for specific contaminants.
Water source & infrastructure
Where Coolidge's water comes from
Coolidge'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 state ownership and serves approximately 769 people through 3 water systems.
Water bodies near Coolidge
Coolidge is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Coolidge
| System Name | PWSID | Population | Source |
|---|---|---|---|
| ARIZONA TRAINING PROGRAM | AZ0411037 | 470 | GW |
| WHISPERING WIND MOBILE HOME PARK | AZ0411365 | 200 | GW |
| SIGNAL PEAK WATER COMPANY | AZ0411079 | 99 | GWP |
How Coolidge compares
Full Arizona rankings →Coolidge'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 Coolidge, AZ
Wikipedia →Phoenix is the capital and most populous city of the U.S. state of Arizona. With over 1.6 million residents at the 2020 census, Phoenix is the fifth-most populous city in the United States and the most populous state capital. The Phoenix metropolitan area, with an estimated 5.19 million residents, is the tenth-most populous metropolitan area in the U.S. and the most populous in the Mountain states and Southwest. Phoenix is the county seat of Maricopa County in the Salt River Valley and Arizona Sun Corridor and, with an area of 517.9 square miles, is the largest city by area in Arizona and 11th-largest city by area in the United States.
Learn more about your water
Guides and resources related to Coolidge's water quality findings.
Explore water quality across Pinal
Frequently asked questions
Is Coolidge, AZ tap water safe to drink?
Coolidge's water quality earned a grade of D+ (50/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #197 out of 292 cities tested in Arizona.
What contaminants are in Coolidge's water?
Lead was measured at 1.5 ppb (90th percentile). 724 violations are on record.
How is Coolidge'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 Coolidge?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Coolidge's water come from?
Coolidge's water is sourced from Groundwater. The city has 3 water systems serving approximately 769 residents.
What health violations has Coolidge's water system had?
Coolidge has 18 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. 99 violations remain unresolved.
Is Coolidge's groundwater at risk of contamination?
Coolidge 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 724 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 Coolidge's water compare to other cities?
Coolidge ranks #197 out of 292 cities in Arizona (better than 33% of state cities) and #13175 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.