Water Quality in Chino Valley, AZ: 27 Violations — Grade C
Grade C · Score 69/100 · 5 water systems · Updated 2026-05-03
Chino Valley's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Tracked under the EPA Safe Drinking Water program, Chino Valley, AZ shows 27 water violations on file — findings that span multiple violation categories and are detailed system by system in the data grid further down the page.
Water Quality by ZIP Code in Chino Valley
Water quality varies across Chino Valley's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 86323 | C | 69 | 27 | 0 | View report → |
Water Quality Overview
Chino Valley, Arizona receives a water quality grade of C with an overall score of 69 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 5 water systems serving Chino Valley have accumulated 27 EPA violations (all monitoring/reporting type). These violations are tracked across 1 ZIP codes serving approximately 7,658 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Chino Valley's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Chino Valley water systems is 0.0035 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
Radon Risk
Chino Valley is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving Chino Valley
Chino Valley is served by 5 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 7,658 people across 1 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving Chino Valley. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Chino Valley
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Chino Valley Water Systems
The following contaminants have been detected or caused violations across Chino Valley's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Revised Total Coliform Rule | Microbiological | N/A | 11 | 1 | No |
| Surface Water Treatment Rule | Treatment Technique | N/A | 4 | 1 | No |
| Barium | Inorganic | 2 mg/L | 3 | 1 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 2 | 1 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 2 | 1 | No |
| Total Organic Carbon | Disinfection Byproducts | N/A | 1 | 1 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 1 | 1 | No |
| Lead | Inorganic | 0.015 mg/L | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 9 enforcement actions against water systems serving Chino Valley. Recent actions:
| Date | Action Type |
|---|---|
| 2025-09-10 | State Order Extension |
| 2025-07-29 | State Informal Action |
| 2025-07-29 | State Informal Enforcement |
| 2025-02-14 | State Order Extension |
| 2025-02-09 | State Informal Action |
| 2025-02-09 | State Informal Enforcement |
| 2025-02-09 | State Order Extension |
| 2024-11-25 | State Informal Action |
| 2024-11-25 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-09-10.
Chino Valley vs. Nearby Arizona Cities
How Chino Valley's water quality compares to similar cities in Arizona:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Chino Valley | C | 27 | 5 | 7,658 |
| Claypool | C | 0 | 1 | 7,536 |
| Peridot | D | 0 | 1 | 7,536 |
| San Carlos | D | 0 | 1 | 7,536 |
Common Questions About Chino Valley Water
These are the most common questions residents search for about water quality in Chino Valley, Arizona:
Is Chino Valley water hard or soft? Water hardness varies by source. Chino Valley's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Chino Valley tap water? Chino Valley's water receives a grade of C (69/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Chino Valley? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Chino Valley vs. Arizona Average
Understanding how Chino Valley compares to the broader Arizona average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Chino Valley.
ZIP Codes in Chino Valley
Chino Valley spans 1 ZIP code. The ZIP with the lowest water quality score is 86323. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.