Maricopa Water Quality
Arizona
According to EPA SDWIS, Maricopa, Arizona is served by 40 community water systems covering about 128,679 people. The same extract lists 514 health-based violation records, most recently coded 1040 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Maricopa, Arizona is delivered through 40 EPA-regulated community water systems serving an estimated 128,679 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 514 violation records across the 40 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 10 distinct EPA contaminant codes: Nitrate, Revised Total Coliform Rule, Groundwater Rule, LEAD AND COPPER RULE REVISIONS, Arsenic and 5 others. 2 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 |
|---|---|---|---|
| GW SANTA CRUZ WATER CO | 84,000 | 2 | Health |
| Ak-Chin Village | 11,646 | 3 | Health |
| GW FARMERS WATER CO - CONTINENTAL | 5,592 | 0 | Clean |
| GW FARMERS WATER CO - SANTA RITA SPRINGS | 3,990 | 0 | Clean |
| GW SANTA CRUZ WATER CO - RED ROCK | 3,813 | 0 | Clean |
| GW SAGUARO DIST WATER CO - LAS QUINTAS | 3,720 | 0 | Clean |
| GW OCOTILLO WATER - RANCHO DEL SOL LINDO | 3,128 | 0 | Clean |
| THUNDERBIRD FARMS DWID | 2,231 | 58 | Health |
| GW SANTA CRUZ WATER - MARICOPA SW | 1,170 | 0 | Clean |
| GW OCOTILLO WATER - CATALINA | 1,168 | 0 | Clean |
| MARICOPA CONSOLIDATED DWID | 928 | 11 | Health |
| GW OCOTILLO WATER - DIAMOND BELL | 706 | 0 | Clean |
| GW -BWC, INC- SUNSHINE | 604 | 8 | Health |
| PAPAGO BUTTE DWID | 530 | 145 | Health |
| GW OCOTILLO WATER - VALLEY VIEW ACRES | 496 | 0 | Clean |
| GW FARMERS WATER CO - SAHUARITA | 492 | 0 | Clean |
| GW FARMERS WATER CO - SAHUARITA HIGHLAND | 492 | 3 | Health |
| MARICOPA MOUNTAIN DWID 1 | 450 | 54 | Health |
| GW -BWC, INC- BUCKEYE RANCH | 422 | 0 | Clean |
| VALLE ESCONDIDO | 405 | 16 | Health |
| GW -BWC, INC.- NSWC | 319 | 0 | Clean |
| GW -BWC, INC- EAGLETAIL | 288 | 0 | Clean |
| GW OCOTILLO WATER - SILVERBELL WEST | 263 | 0 | Clean |
| GW SAGUARO DIST WATER CO - TALA WAY | 255 | 0 | Clean |
| GW SAGUARO DIST WATER CO - MIRABELL | 180 | 0 | Clean |
| GW OCOTILLO WATER - THUNDERHEAD | 174 | 0 | Clean |
| ANTELOPE PEAK DWID | 150 | 130 | Health |
| GW- BWC, INC- DIXIE | 132 | 0 | Clean |
| MARICOPA MOUNTAIN DWID 2 | 120 | 0 | Clean |
| GW SAGUARO DIST WATER CO - LYN LEE | 114 | 0 | Clean |
| GW SAGUARO DIST WATER CO - AMBER ANN | 108 | 0 | Clean |
| NEW SADDLEBACK VISTA | 100 | 77 | Health |
| GW OCOTILLO WATER - SIERRITA FOOTHILLS | 84 | 0 | Clean |
| GW -BWC, INC.- WPE #6 | 69 | 0 | Clean |
| GW SAGUARO DIST WATER CO - TORTOLITA | 69 | 0 | Clean |
| GW- BWC, INC- ROSEVIEW | 66 | 0 | Clean |
| AMERICAN REALTY MORTGAGE COMPANY | 60 | 7 | Health |
| GW SANTA CRUZ WATER -TWIN HAWKS WATER | 57 | 0 | Clean |
| GW- BWC, INC- GARDEN CITY | 51 | 0 | Clean |
| GW SANTA CRUZ WATER - CP WATER CO | 37 | 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 |
|---|---|---|
| PAPAGO BUTTE DWID | Nitrate | 2025-10-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2025-10-01 |
| GW SANTA CRUZ WATER CO | Revised Total Coliform Rule | 2025-08-01 |
| GW SANTA CRUZ WATER CO | Revised Total Coliform Rule | 2025-08-01 |
| PAPAGO BUTTE DWID | Nitrate | 2025-07-01 |
| PAPAGO BUTTE DWID | Nitrate | 2025-07-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2025-07-01 |
| NEW SADDLEBACK VISTA | Nitrate | 2025-04-01 |
| NEW SADDLEBACK VISTA | Nitrate | 2025-04-01 |
| PAPAGO BUTTE DWID | Nitrate | 2025-04-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2025-04-01 |
| NEW SADDLEBACK VISTA | Nitrate | 2025-01-01 |
| NEW SADDLEBACK VISTA | Nitrate | 2025-01-01 |
| NEW SADDLEBACK VISTA | Nitrate | 2025-01-01 |
| PAPAGO BUTTE DWID | Nitrate | 2025-01-01 |
| PAPAGO BUTTE DWID | Nitrate | 2025-01-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2025-01-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2025-01-01 |
| VALLE ESCONDIDO | Groundwater Rule | 2024-11-02 |
| VALLE ESCONDIDO | Groundwater Rule | 2024-11-02 |
| ANTELOPE PEAK DWID | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| NEW SADDLEBACK VISTA | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| NEW SADDLEBACK VISTA | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| VALLE ESCONDIDO | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| VALLE ESCONDIDO | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| PAPAGO BUTTE DWID | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| PAPAGO BUTTE DWID | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| MARICOPA CONSOLIDATED DWID | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| MARICOPA CONSOLIDATED DWID | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| PAPAGO BUTTE DWID | Nitrate | 2024-10-01 |
| PAPAGO BUTTE DWID | Nitrate | 2024-10-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2024-10-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2024-10-01 |
| PAPAGO BUTTE DWID | Nitrate | 2024-07-01 |
| PAPAGO BUTTE DWID | Nitrate | 2024-07-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2024-07-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2024-07-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2024-07-01 |
| NEW SADDLEBACK VISTA | Nitrate | 2024-04-01 |
| NEW SADDLEBACK VISTA | Nitrate | 2024-04-01 |
| NEW SADDLEBACK VISTA | Nitrate | 2024-04-01 |
| NEW SADDLEBACK VISTA | Nitrate | 2024-04-01 |
| PAPAGO BUTTE DWID | Nitrate | 2024-04-01 |
| PAPAGO BUTTE DWID | Nitrate | 2024-04-01 |
| PAPAGO BUTTE DWID | Nitrate | 2024-04-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2024-04-01 |
| MARICOPA MOUNTAIN DWID 1 | Nitrate | 2024-04-01 |
| ANTELOPE PEAK DWID | Nitrate | 2024-01-01 |
| ANTELOPE PEAK DWID | Nitrate | 2024-01-01 |
| ANTELOPE PEAK DWID | Nitrate | 2024-01-01 |
What are Maricopa's health-based records for?
Maricopa's health-based violation records carry 8 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 | 280 | 7 |
| Arsenic | 135 | 8 |
| Fluoride | 39 | 2 |
| Combined Uranium | 39 | 1 |
| Lead and Copper Rule Revisions | 9 | 5 |
| Revised Total Coliform Rule | 3 | 2 |
| Interim Enhanced Surface Water Treatment Rule | 3 | 1 |
| Lead and Copper Rule | 3 | 1 |
TRI Facilities in Maricopa
| Facility | Total Releases |
|---|---|
| Pinal Energy LLC | 1 lbs |
| Calportland Maricopa Plant | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Maricopa, Arizona? ▼
How many water violations does Maricopa have in this EPA extract? ▼
What contaminants were found in Maricopa water? ▼
How many water systems serve Maricopa? ▼
Where does Maricopa get its drinking water? ▼
Are there pollution sources near Maricopa? ▼
How does Maricopa compare in Arizona?
Of the 191 Arizona places with at least one community water system on file, Maricopa ranks #4 by number of systems (40).
Either side of it: Ft Defiance (83), Phoenix (49), Sells (27), Payson (25)
About This Data
Figures here are the current EPA SDWIS extract joined to the 40 community water systems whose service area lists Maricopa, 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.