Public water system record
City of Tempe
Serves Tempe and Guadalupe, Maricopa County, AZ · 165,000 people served
Federal records show 2 health-based violations and 11 monitoring/reporting issues for City of Tempe in the last ten years. The most serious issue in this window was a resolved Long Term 2 Enhanced Surface Water Treatment Rule violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 11
Key facts
- City of Tempe draws water from 13 wells and 2 surface water intakes (1 of them for emergency, seasonal or other part-time use).
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2017.
- Record on file since 1978, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 2,465 unknown out of 47,330 service lines.
Check whether City of Tempe serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Apr 1, 2017 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
Full record since 1978
EPA's records for City of Tempe go back to 1978. Before October 19, 2016 they list no health-based violations and 288 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 8 |
| 1980s | 0 | 24 |
| 1990s | 0 | 54 |
| 2000s | 0 | 197 |
| 2010 to October 18, 2016 | 0 | 5 |
| October 19, 2016 to 2019 | 2 | 11 |
What the violations mean
Long Term 2 Enhanced Surface Water Treatment Rule
1 incidentThe system failed required surface water treatment or filtration standards
Untreated or inadequately treated surface water can contain bacteria and viruses
Total Trihalomethanes (TTHMs)
1 incidentDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
City of Tempe draws water from 13 wells and 2 surface water intakes (1 of them for emergency, seasonal or other part-time use). It also has emergency connections to City of Chandler and City of Phoenix. 2 other public water systems have emergency connections to City of Tempe.
Emergency or part-time connections to
- City of Chandler Chandler, AZ
- City of Phoenix Phoenix, AZ
Annual water quality report
City of Tempe must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Arizona.
Certified drinking water labs by state EPA guidance for private wells