Public water system record
Granite Mountain Water Company
Serves Prescott and Williamson, Yavapai County, AZ · 381 people served
Federal records show no health-based violations and 8 monitoring/reporting issues for Granite Mountain Water Company 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
- 8
Key facts
- Granite Mountain Water Company draws water from 2 wells.
- Record on file since 1999, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 110 unknown out of 160 service lines.
Check whether Granite Mountain Water Company 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 13, 2025 | Active |
|
Consumer Confidence Rule
OTHER
|
Oct 2, 2025 | Active |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 | Active |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
Full record since 1999
EPA's records for Granite Mountain Water Company go back to 1999. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 116 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 2 | 65 |
| 2000s | 1 | 38 |
| 2010 to October 18, 2016 | 1 | 13 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 7 |
Most recent health-based violation before October 19, 2016: Total Coliform, began December 2014, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1999 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 1999 | Resolved |
Where the water comes from
Granite Mountain Water Company draws water from 2 wells.
Annual water quality report
Granite Mountain Water Company 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 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Granite Mountain Water Company for a copy.
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