Prescott Water Quality
Arizona
According to EPA SDWIS, Prescott, Arizona is served by 20 community water systems covering about 48,217 people. The same extract lists 60 health-based violation records, most recently coded 0700 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Prescott, Arizona is delivered through 20 EPA-regulated community water systems serving an estimated 48,217 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 60 violation records across the 20 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 6 distinct EPA contaminant codes: Groundwater Rule, Nitrate, LEAD AND COPPER RULE REVISIONS, Aluminum, Revised Total Coliform Rule and 1 others. 3 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Arizona drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| PRESCOTT CITY OF | 42,217 | 1 | Health |
| GRANITE OAKS WATER USERS ASSOCIATION | 1,200 | 0 | Clean |
| PONDEROSA PARK DWID | 602 | 0 | Clean |
| INSCRIPTION CANYON WATER COMPANY | 566 | 0 | Clean |
| YARNELL WATER IMPROVEMENT ASSOCIATION | 515 | 0 | Clean |
| BRADSHAW WATER COMPANY INC | 510 | 0 | Clean |
| INSCRIPTION CANYON WATER COMPANY | 507 | 0 | Clean |
| GROOM CREEK WATER USERS | 458 | 0 | Clean |
| HIGHLAND PINE DWID | 450 | 0 | Clean |
| WHITE HORSE RANCH OWNERS ASSOCIATION | 292 | 53 | Health |
| COPCO LAKE MWC | 181 | 1 | Health |
| QUAIL RIDGE DWID | 179 | 0 | Clean |
| AMERICAN RANCH DWID | 140 | 1 | Health |
| BEVERLY GARDENS TRAILER PARK | 120 | 0 | Clean |
| RANCHO VIDA RV PARK | 57 | 1 | Health |
| LAKESIDE WATER COMPANY | 55 | 1 | Health |
| PINEHURST WATER COMPANY | 54 | 1 | Health |
| GRANITE DELLS WATER COMPANY | 50 | 0 | Clean |
| MANNEKEN APARTMENTS | 34 | 1 | Health |
| JACKSON ACRES DWID | 30 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| WHITE HORSE RANCH OWNERS ASSOCIATION | Groundwater Rule | 2025-11-06 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Groundwater Rule | 2025-11-06 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2025-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2025-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2025-04-01 |
| PRESCOTT CITY OF | Groundwater Rule | 2025-01-03 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2025-01-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2025-01-01 |
| PINEHURST WATER COMPANY | Groundwater Rule | 2024-10-31 |
| RANCHO VIDA RV PARK | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| AMERICAN RANCH DWID | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2024-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2024-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2024-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2024-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2024-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2024-04-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2024-04-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2024-01-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2024-01-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2024-01-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-04-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-04-01 |
| COPCO LAKE MWC | Aluminum | 2023-01-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-01-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2023-01-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2022-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2022-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2022-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2022-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2022-04-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2022-04-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2022-01-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2021-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2021-04-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2021-04-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2020-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2020-07-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2020-04-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2020-01-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2019-10-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2019-04-01 |
| WHITE HORSE RANCH OWNERS ASSOCIATION | Nitrate | 2018-07-01 |
What are Prescott's health-based records for?
Prescott's health-based violation records carry 6 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Nitrate | 51 | 1 |
| Groundwater Rule | 4 | 3 |
| Lead and Copper Rule Revisions | 2 | 2 |
| Aluminum | 1 | 1 |
| Combined Uranium | 1 | 1 |
| Revised Total Coliform Rule | 1 | 1 |
TRI Facilities in Prescott
| Facility | Total Releases |
|---|---|
| Nestle Health Science US | 3.9K lbs |
| Sturm Ruger & Co Inc | 720 lbs |
| Martin Marietta Arizona LLC - Yavapai Plant | 420 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Prescott, Arizona? ▼
How many water violations does Prescott have in this EPA extract? ▼
What contaminants were found in Prescott water? ▼
How many water systems serve Prescott? ▼
Where does Prescott get its drinking water? ▼
Are there pollution sources near Prescott? ▼
How does Prescott compare in Arizona?
Of the 191 Arizona places with at least one community water system on file, Prescott ranks #9 by number of systems (20).
Either side of it: Glendale (22), El Mirage (20), Scottsdale (20), Yuma (20)
About This Data
Figures here are the current EPA SDWIS extract joined to the 20 community water systems whose service area lists Prescott, ranked against the 191 Arizona places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.