Water Quality: Gilbert, AZ
5 water systems • 248,247 people served
Multiple Health ViolationsWater Quality Summary
Gilbert is served by 5 public water systems with a combined service population of 248,247 people, and has 692 EPA Safe Drinking Water Act violations on record. Critically, 18 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Gilbert's violation count is 82% above the national average for Arizona. Contaminants associated with violations include Barium, Bromate, Chlorine Dioxide, Stage 2 DBP, TTHM.
Contaminants Found
Increases blood pressure and causes cardiovascular effects with long-term exposure.
Common source: Natural rock deposits, oil drilling operations, coal power plant waste
EPA limit: 2 mg/L
Probable human carcinogen that increases the risk of kidney and thyroid cancers.
Common source: Ozonation of bromide-containing water; used as flour improver
EPA limit: 0.010 mg/L (10 ppb)
Can cause anemia in infants and young children; may cause nervous system effects at high levels.
Common source: Water treatment disinfectant used to control taste, odor, and microorganisms
EPA limit: 0.8 mg/L
Trihalomethanes and haloacetic acids that increase cancer risk and may cause adverse reproductive outcomes.
Common source: Chlorine disinfection reacting with natural organic matter in source water
EPA limit: TTHM: 0.080 mg/L; HAA5: 0.060 mg/L
Total trihalomethanes are linked to increased risk of bladder cancer and adverse reproductive outcomes.
Common source: Reaction of chlorine disinfectants with naturally occurring organic matter in water
EPA limit: 0.080 mg/L (80 ppb)
Water Systems Serving Gilbert
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| GILBERT, TOWN OF | AZ0407092 | Surface Water | 247,600 | 526 |
| ROOSEVELT RANCH RV & MHP | AZ0404342 | Groundwater | 430 | 19 |
| APACHE LAKE MARINA RESORT | AZ0407630 | Surface Water | 123 | 45 |
| GREENFIELD RANCHETTES | AZ0407492 | Groundwater | 53 | 69 |
| AUGUST HILLS MHP | AZ0404332 | Groundwater | 41 | 33 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Arizona
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.