Water Quality in Las Vegas, NV: 308 Violations — Grade A
Grade A · Score 91/100 · 5 water systems · Updated 2026-05-03
Las Vegas's water meets all EPA standards with no health-based violations.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
EPA files for Las Vegas, NV document 308 water violations — a record that encompasses health-based exceedances, monitoring and reporting failures, and any other compliance events registered for local public water systems across all available federal compliance records for this area.
Water Quality Map: Las Vegas, NV
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Water Quality by ZIP Code in Las Vegas
Water quality varies across Las Vegas's 77 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 89101 | A | 86 | 4 | 1 | View report → |
| 89102 | A | 86 | 4 | 1 | View report → |
| 89103 | A | 86 | 4 | 1 | View report → |
| 89104 | A | 86 | 4 | 1 | View report → |
| 89106 | A | 86 | 4 | 1 | View report → |
| 89108 | A | 86 | 4 | 1 | View report → |
| 89109 | A | 86 | 4 | 1 | View report → |
| 89110 | A | 86 | 4 | 1 | View report → |
| 89113 | A | 86 | 4 | 1 | View report → |
| 89117 | A | 86 | 4 | 1 | View report → |
| 89118 | A | 86 | 4 | 1 | View report → |
| 89120 | A | 86 | 4 | 1 | View report → |
| 89122 | A | 86 | 4 | 1 | View report → |
| 89123 | A | 86 | 4 | 1 | View report → |
| 89124 | A | 86 | 4 | 1 | View report → |
Water Quality Overview
Las Vegas, Nevada receives a water quality grade of A with an overall score of 91 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 5 water systems serving Las Vegas have accumulated 308 EPA violations, including 77 health-based violations. These violations are tracked across 77 ZIP codes serving approximately 1,563,833 people.
What Grade A Means
A grade of A indicates excellent compliance with EPA drinking water standards. Las Vegas's water systems have maintained strong performance in both contaminant monitoring and regulatory compliance.
Lead Levels
The average 90th percentile lead level across Las Vegas water systems is 0.0021 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
Water Systems Serving Las Vegas
Las Vegas is served by 5 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 1,563,833 people across 77 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 770 enforcement actions against water systems serving Las Vegas. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Las Vegas
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 Las Vegas Water Systems
The following contaminants have been detected or caused violations across Las Vegas's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 77 | 77 | No |
| Surface Water Treatment Rule | Treatment Technique | N/A | 77 | 77 | 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 8 enforcement actions against water systems serving Las Vegas. Recent actions:
| Date | Action Type |
|---|---|
| 2025-11-04 | State Informal Action |
| 2025-11-04 | State Informal Enforcement |
| 2025-10-15 | State Informal Action |
| 2025-10-15 | State Informal Enforcement |
| 2025-04-26 | State Order Extension |
| 2025-01-05 | State Informal Action |
| 2025-01-05 | State Informal Enforcement |
| 2023-09-07 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-11-04.
Las Vegas vs. Nearby Nevada Cities
How Las Vegas's water quality compares to similar cities in Nevada:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Las Vegas | A | 308 | 5 | 1,563,833 |
| The Lakes | C | 0 | 3 | 1,573,358 |
| Reno | B | 48 | 5 | 454,618 |
| Nixon | D | 0 | 1 | 442,000 |
Recommended Water Filters for Las Vegas
Based on contaminants detected in Las Vegas's water supply, these filter types are recommended:
Reverse Osmosis (under-sink)
- Removes: Copper, Lead
- Effectiveness: 95-99%
- Cost range: $150–$500
- Certification: NSF/ANSI 58
- Recommended products:
- Waterdrop G3P800
- Aquasana AQ-5200
- Clearly Filtered Pitcher
Granular Activated Carbon (GAC, whole-house or under-sink)
- Removes: Free Chlorine Residual
- Effectiveness: 95-99%
- Cost range: $100–$600
- Certification: NSF/ANSI 42
- Recommended products:
- Aquasana AQ-5200
- Waterdrop Chubby Pitcher
- Berkey Travel
Granular Activated Carbon (GAC, under-sink or whole-house)
- Removes: Haloacetic Acids
- Effectiveness: 60-80%
- Cost range: $100–$600
- Certification: NSF/ANSI 53
- Recommended products:
Water Quality by ZIP Code in Las Vegas
Water quality varies across Las Vegas's ZIP codes. The table below shows the worst-scoring and best-scoring areas:
| ZIP Code | Score | Grade | Violations | Health-Based |
|---|---|---|---|---|
| 89101 | 86 | A | 4 | 1 |
| 89102 | 86 | A | 4 | 1 |
| 89103 | 86 | A | 4 | 1 |
| 89104 | 86 | A | 4 | 1 |
| 89106 | 86 | A | 4 | 1 |
| 89108 | 86 | A | 4 | 1 |
| 89109 | 86 | A | 4 | 1 |
| 89110 | 86 | A | 4 | 1 |
| 89113 | 86 | A | 4 | 1 |
| 89117 | 86 | A | 4 | 1 |
| 89199 | 94 | A | 4 | 1 |
| 89195 | 94 | A | 4 | 1 |
| 89193 | 94 | A | 4 | 1 |
| 89185 | 94 | A | 4 | 1 |
| 89180 | 94 | A | 4 | 1 |
Common Questions About Las Vegas Water
These are the most common questions residents search for about water quality in Las Vegas, Nevada:
Is Las Vegas water hard or soft? Water hardness varies by source. Las Vegas's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Las Vegas tap water? Las Vegas's water receives a grade of A (91/100). There are 77 health-based violations — consider filtration.
What is the best water filter for Las Vegas? Based on detected contaminants, a reverse osmosis (under-sink) filter is most recommended. See our Water Filter Matcher for personalized recommendations.
Las Vegas vs. Nevada Average
Understanding how Las Vegas compares to the broader Nevada 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 Las Vegas.
ZIP Codes in Las Vegas
Las Vegas spans 77 ZIP codes. The ZIP with the lowest water quality score is 89101. 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.
Frequently Asked Questions
Your Water is Safe — Here's How to Keep It That Way
Grade A is excellent news. Here's what proactive homeowners do to maintain water quality:
Annual Water Testing
EPA recommends annual testing even with clean water. Home test kits: $20-$50. Catches changes before they become problems.
Maintenance Filtration
A basic carbon filter removes chlorine taste and catches emerging contaminants like PFAS that aren't yet fully regulated.
Plumbing Check
Even safe city water picks up lead from home pipes. If your home was built before 1986, a one-time pipe inspection is recommended.