Public water system record
Town of Mammoth
Serves Mammoth, Pinal County, AZ · 1,181 people served
Federal records show no health-based violations and 14 monitoring/reporting issues for Town of Mammoth in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 14
Key facts
- Town of Mammoth draws water from 2 wells.
- Record on file since 1980, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 491 unknown out of 562 service lines.
Check whether Town of Mammoth 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Nov 20, 2025 | Resolved |
|
Public Notice
OTHER
|
Nov 16, 2025 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 2, 2025 | Resolved |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Active |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jun 1, 2024 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 2, 2023 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 2, 2021 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Apr 1, 2017 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2016 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2016 | Resolved |
Full record since 1980
EPA's records for Town of Mammoth go back to 1980. Before October 19, 2016 they list 2 health-based violations (2 archived by EPA without a recorded fix) and 87 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 2 | 9 |
| 1990s | 0 | 11 |
| 2000s | 0 | 40 |
| 2010 to October 18, 2016 | 0 | 27 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 11 |
Most recent health-based violation before October 19, 2016: Fluoride, began January 1980, Archived.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Fluoride
Contaminant limit exceeded
|
Jan 22, 1980 | Archived |
|
Fluoride
Contaminant limit exceeded
|
Jan 21, 1980 | Archived |
Where the water comes from
Town of Mammoth draws water from 2 wells. 1 smaller public system such as schools, businesses or campgrounds buys water from Town of Mammoth.
Annual water quality report
Town of Mammoth 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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