Flagstaff Water Quality
Arizona
According to EPA SDWIS, Flagstaff, Arizona is served by 15 community water systems covering about 96,657 people. The same extract lists 88 health-based violation records, most recently coded 8000 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Flagstaff, Arizona is delivered through 15 EPA-regulated community water systems serving an estimated 96,657 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 88 violation records across the 15 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 7 distinct EPA contaminant codes: Revised Total Coliform Rule, Groundwater Rule, Arsenic, LEAD AND COPPER RULE REVISIONS, TTHM and 2 others. 4 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 |
|---|---|---|---|
| FLAGSTAFF CITY OF | 79,796 | 1 | Health |
| DONEY PARK WATER | 8,996 | 2 | Health |
| KACHINA VILLAGE DWID | 3,500 | 2 | Health |
| FOREST HIGHLANDS WATER COMPANY | 1,668 | 0 | Clean |
| PONDEROSA UTILITY CORP | 1,585 | 6 | Health |
| MOUNTAIN DELL WATER INC | 250 | 2 | Health |
| PAINTED DESERT DEMO PROJECT STAR SCHOOL | 250 | 1 | Health |
| GREEN VALLEY MHP | 190 | 60 | Health |
| LAKE MARY COUNTRY STORE | 130 | 2 | Health |
| HECKETHORN WATER COMPANY | 90 | 2 | Health |
| USFS KNF TUSAYAN ADMIN | 80 | 7 | Health |
| HOLLY HOCK HILL MHP | 47 | 0 | Clean |
| A1 RANCH DWID | 45 | 0 | Clean |
| LOCKETT ESTATES | 30 | 3 | Health |
| HUC Regional Water System | 0 | 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 |
|---|---|---|
| GREEN VALLEY MHP | Revised Total Coliform Rule | 2025-11-19 |
| HECKETHORN WATER COMPANY | Groundwater Rule | 2025-10-05 |
| GREEN VALLEY MHP | Arsenic | 2025-10-01 |
| GREEN VALLEY MHP | Arsenic | 2025-07-01 |
| GREEN VALLEY MHP | Arsenic | 2025-07-01 |
| GREEN VALLEY MHP | Arsenic | 2025-04-01 |
| GREEN VALLEY MHP | Arsenic | 2025-04-01 |
| GREEN VALLEY MHP | Arsenic | 2025-01-01 |
| GREEN VALLEY MHP | Arsenic | 2025-01-01 |
| GREEN VALLEY MHP | Arsenic | 2025-01-01 |
| PAINTED DESERT DEMO PROJECT STAR SCHOOL | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| LOCKETT ESTATES | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| LOCKETT ESTATES | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| LAKE MARY COUNTRY STORE | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| LAKE MARY COUNTRY STORE | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| HECKETHORN WATER COMPANY | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| GREEN VALLEY MHP | Arsenic | 2024-10-01 |
| GREEN VALLEY MHP | Arsenic | 2024-10-01 |
| GREEN VALLEY MHP | Arsenic | 2024-10-01 |
| PONDEROSA UTILITY CORP | Groundwater Rule | 2024-07-31 |
| PONDEROSA UTILITY CORP | Groundwater Rule | 2024-07-31 |
| GREEN VALLEY MHP | Arsenic | 2024-07-01 |
| GREEN VALLEY MHP | Arsenic | 2024-07-01 |
| MOUNTAIN DELL WATER INC | Groundwater Rule | 2024-05-19 |
| MOUNTAIN DELL WATER INC | Groundwater Rule | 2024-05-19 |
| PONDEROSA UTILITY CORP | Groundwater Rule | 2024-05-17 |
| PONDEROSA UTILITY CORP | Groundwater Rule | 2024-05-17 |
| GREEN VALLEY MHP | Arsenic | 2024-04-01 |
| GREEN VALLEY MHP | Arsenic | 2024-04-01 |
| GREEN VALLEY MHP | Arsenic | 2024-04-01 |
| GREEN VALLEY MHP | Arsenic | 2024-04-01 |
| GREEN VALLEY MHP | Arsenic | 2024-01-01 |
| GREEN VALLEY MHP | Arsenic | 2024-01-01 |
| GREEN VALLEY MHP | Arsenic | 2024-01-01 |
| GREEN VALLEY MHP | Arsenic | 2024-01-01 |
| PONDEROSA UTILITY CORP | Revised Total Coliform Rule | 2023-10-09 |
| PONDEROSA UTILITY CORP | Revised Total Coliform Rule | 2023-10-09 |
| GREEN VALLEY MHP | Arsenic | 2023-10-01 |
| GREEN VALLEY MHP | Arsenic | 2023-10-01 |
| GREEN VALLEY MHP | Arsenic | 2023-10-01 |
| GREEN VALLEY MHP | Arsenic | 2023-10-01 |
| GREEN VALLEY MHP | Arsenic | 2023-10-01 |
| GREEN VALLEY MHP | Arsenic | 2023-07-01 |
| GREEN VALLEY MHP | Arsenic | 2023-07-01 |
| GREEN VALLEY MHP | Arsenic | 2023-07-01 |
| GREEN VALLEY MHP | Arsenic | 2023-07-01 |
| GREEN VALLEY MHP | Arsenic | 2023-07-01 |
| GREEN VALLEY MHP | Arsenic | 2023-04-01 |
| GREEN VALLEY MHP | Arsenic | 2023-04-01 |
| GREEN VALLEY MHP | Arsenic | 2023-04-01 |
What are Flagstaff's health-based records for?
Flagstaff's health-based violation records carry 7 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 |
|---|---|---|
| Arsenic | 59 | 1 |
| Groundwater Rule | 12 | 6 |
| Revised Total Coliform Rule | 7 | 4 |
| Lead and Copper Rule Revisions | 6 | 4 |
| Tthm | 2 | 1 |
| Surface Water Treatment Rule | 1 | 1 |
| Total Haloacetic Acids (HAA5) | 1 | 1 |
TRI Facilities in Flagstaff
| Facility | Total Releases |
|---|---|
| W. L. Gore & Associates Inc. | 20.9K lbs |
| Nestle Purina Petcare Co | 4.8K lbs |
| Flagstaff Plant #21 | 5 lbs |
| Cemex - Flagstaff #1971 | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Flagstaff, Arizona? ▼
How many water violations does Flagstaff have in this EPA extract? ▼
What contaminants were found in Flagstaff water? ▼
How many water systems serve Flagstaff? ▼
Where does Flagstaff get its drinking water? ▼
Are there pollution sources near Flagstaff? ▼
How does Flagstaff compare in Arizona?
Of the 191 Arizona places with at least one community water system on file, Flagstaff ranks #12 by number of systems (15).
Either side of it: Scottsdale (20), Yuma (20), Sedona (15), Camp Verde (12)
About This Data
Figures here are the current EPA SDWIS extract joined to the 15 community water systems whose service area lists Flagstaff, 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.