Water Quality in Williams, AZ: 27 Violations - Grade N/A
1 water system · 1 directly mapped ZIP records
Available EPA records report 27 violations across 1 directly mapped ZIP records with known counts for Williams. This is compliance evidence, not a property-level tap-water verdict.
Data: EPA Safe Drinking Water Information System (SDWIS)
Water Quality by ZIP Code in Williams
This table shows typed EPA water evidence only. Missing violation counts are displayed as N/A, not zero.
| ZIP Code | Violations | Health | |
|---|---|---|---|
| 86046 | 27 | 6 | View report → |
Violation Trend
EPA violations recorded for water systems serving Williams.
| Year | Total violations | Health-based |
|---|---|---|
| 2022 | 2 | 2 |
| 2023 | 2 | 2 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
Water Quality Overview
Williams, Arizona has directly mapped EPA water-system data for 1 ZIP codes. This page reports typed compliance facts and does not relabel the multi-source Home Safety Score as a drinking-water grade.
The available EPA records report 27 violations, including 6 health-based violations across 1 directly mapped ZIP record with reported counts.
Lead Levels
The average 90th percentile lead level across Williams water systems is 0.0000 mg/L - within EPA limits. No exceedances appear among the 1 ZIP records with known lead status.
Water Systems Serving Williams
Williams is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 6,669 people across 1 ZIP code.
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 Williams. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Williams
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels and violation history
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 Williams Water Systems
The following contaminants have been detected or caused violations across Williams's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| E. coli | Microbiological | N/A | 6 | 1 | No |
| Fecal Coliform | Microbiological | N/A | 6 | 1 | Yes |
| Chlorite | Disinfection Byproducts | 1 mg/L | 4 | 1 | Yes |
| Barium | Inorganic | 2 mg/L | 3 | 1 | Yes |
| Surface Water Treatment Rule | Treatment Technique | N/A | 3 | 1 | No |
| Revised Total Coliform Rule | Microbiological | N/A | 2 | 1 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 2 | 1 | No |
| Lead and Copper Rule | Treatment Technique | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Williams:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2022 | 2 | 2 |
| 2023 | 2 | 2 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
Violations have decreased from 2 in 2022 to 1 in 2026, indicating improving compliance.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Williams. Recent actions:
| Date | Action Type |
|---|---|
| 2026-03-23 | State Informal Action |
| 2026-02-26 | State Filed Suit |
| 2026-02-04 | State Informal Action |
| 2026-02-04 | State Order Extension |
| 2026-01-12 | State Informal Action |
| 2025-12-09 | State Informal Action |
| 2025-12-09 | State Informal Enforcement |
| 2025-10-16 | State Informal Action |
| 2025-08-08 | State Order Extension |
| 2025-08-07 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2026-03-23.
Williams vs. Nearby Arizona Cities
How Williams's water quality compares to similar cities in Arizona:
| City | Direct EPA ZIPs | Violations | Systems | Population |
|---|---|---|---|---|
| Williams | 1 | 27 | 1 | 6,669 |
| Thatcher | 1 | 9 | 1 | 6,619 |
| Bisbee | 1 | 10 | 4 | 6,798 |
| Mayer | 1 | 21 | 3 | 6,425 |
Common Questions About Williams Water
These are the most common questions residents search for about water quality in Williams, Arizona:
Is Williams water hard or soft? Water hardness varies by source. Williams's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Williams tap water? City-level EPA records cannot determine safety at a specific tap. The measured subset contains 6 health-based violations; check the affected utility record and consider certified testing.
What is the best water filter for Williams? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Williams vs. Arizona Average
Understanding how Williams 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 Williams.
ZIP Codes in Williams
Williams spans 1 ZIP code. EPA water-system coverage is available for 1 directly mapped ZIP code. 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
Source reporting periods vary. See each cited source for its publication schedule.