Water Quality: Tempe, AZ
4 water systems • 166,887 people served
Some ConcernsWater Quality Summary
Tempe is served by 4 public water systems with a combined service population of 166,887 people, and has 157 EPA Safe Drinking Water Act violations on record. Critically, 3 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Tempe's violation count is 59% below the national average for Arizona. Contaminants associated with violations include Bromate, Stage 2 DBP, TTHM.
Contaminants Found
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)
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 Tempe
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| TEMPE CITY OF | AZ0407100 | Surface Water | 165,000 | 17 |
| BERNEIL WATER COMPANY | AZ0407008 | Groundwater | 1,388 | 53 |
| PICACHO PEAK RV RESORT | AZ0411547 | Groundwater | 400 | 34 |
| SIGNAL PEAK WATER COMPANY | AZ0411079 | Groundwater | 99 | 53 |
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.