Water Quality Report · Updated October 07, 2026
ARIZONA WATER CO - PINAL VALLEY
ARIZONA WATER CO - PINAL VALLEY delivers tap water graded C (66/100) by TapWaterSafety.org. The utility serves approximately 134,432 residents in CASA GRANDE, Arizona using groundwater. The most significant water quality concerns are: Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Arsenic significantly above health guideline; Chromium (hexavalent) significantly above health guideline. For questions, the utility can be reached at 602-294-2151.
Is CASA GRANDE tap water safe to drink?
ARIZONA WATER CO - PINAL VALLEY delivers tap water that earns a grade of C (66/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 134,432 residents in CASA GRANDE, drawing from groundwater.
Public testing data identifies 8 contaminants in this water above EWG's health-based guidelines, including: Perfluorohexane sulfonate (PFHXS), Arsenic, Chromium (hexavalent), Total trihalomethanes (TTHMs), Haloacetic acids (HAA9), Nitrate, Nitrate and nitrite, Haloacetic acids (HAA5). For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for ARIZONA WATER CO - PINAL VALLEY (system ID AZ0411009) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Arsenic Rule | Missed testing or reporting | 04/01/2025 | Open |
| Ground Water Rule | Missed testing or reporting | 08/20/2025 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for CASA GRANDE residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for ARIZONA WATER CO - PINAL VALLEY.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 1.15 ppt, 1150x above the EWG health guideline of 0.001 ppt.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 4.58 ppb, 1146x above the EWG health guideline of 0.004 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 6.82 ppb, 341x above the EWG health guideline of 0.02 ppb.
Contact ARIZONA WATER CO - PINAL VALLEY
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for CASA GRANDE
Filters matched to the specific contaminants in this water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 66/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
1.15 ppt | 0.001 | 10.0 | — | — | — | — | 1150× over |
| Arsenic Heavy metal |
4.58 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 1146× over |
| Chromium (hexavalent) Heavy metal |
6.82 ppb | 0.02 | — | — | — | — | — | 341× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
17.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 114× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
4.52 ppb | 0.06 | — | — | — | — | — | 75× over |
| Nitrate Inorganic |
5.65 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 40× over |
| Nitrate and nitrite Inorganic |
5.55 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 40× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
2.01 ppb | 0.1 | 60.0 | 60 | — | — | — | 20× over |
| Radium, combined (-226 and -228) Radiological |
0.05 pCi/L | 0.05 | 5.0 | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
167.0 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
7.69 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
2.91 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
47.3 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Selenium Heavy metal |
1.51 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
18.6 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
3.91 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
3.87 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
3.33 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.254 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
1.6 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
1.41 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
8.71 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
1.28 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.798 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
217.8 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
ARIZONA WATER CO - PINAL VALLEY service area
This water system serves 1 community in Pinal County, Arizona. Click any city for its dedicated tap water quality page.
Find the right filter for CASA GRANDE water
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