Water Quality in Riverton, WY: 26 Violations — Grade D
Grade D · Score 54/100 · 5 water systems · Updated 2026-05-03
Riverton's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
On record with EPA: Riverton, WY has 26 water violations.
Water Quality by ZIP Code in Riverton
Water quality varies across Riverton's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 82501 | D | 54 | 26 | 7 | View report → |
Violation Trend
EPA violations recorded for water systems serving Riverton.
Water Quality Overview
Riverton, Wyoming receives a water quality grade of D with an overall score of 54 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 5 water systems serving Riverton have accumulated 26 EPA violations, including 7 health-based violations. These violations are tracked across 1 ZIP codes serving approximately 11,250 people.
What Grade D Means
A grade of D indicates significant compliance issues. Riverton's water systems have accumulated violations that suggest ongoing water quality challenges. Residents should check their specific ZIP code report and consider water testing or filtration.
Lead Levels
The average 90th percentile lead level across Riverton water systems is 0.0040 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 65% of homes built before 1986, Riverton has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Radon Risk
Riverton is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Riverton
Riverton is served by 5 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 11,250 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 Riverton. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Riverton
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 Riverton Water Systems
The following contaminants have been detected or caused violations across Riverton's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Surface Water Treatment Rule | Treatment Technique | N/A | 7 | 1 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 4 | 1 | No |
| Revised Total Coliform Rule | Microbiological | N/A | 3 | 1 | No |
| Total Coliform | Microbiological | N/A | 1 | 1 | No |
| Barium | Inorganic | 2 mg/L | 1 | 1 | No |
| Total Organic Carbon | Disinfection Byproducts | N/A | 1 | 1 | No |
| Radium-228 | Radionuclides | 5 pCi/L | 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 Riverton:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2021 | 1 | 1 |
| 2023 | 2 | 2 |
| 2024 | 2 | 2 |
| 2025 | 1 | 1 |
Violation counts have remained stable over the observed period.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Riverton. Recent actions:
| Date | Action Type |
|---|---|
| 2025-09-18 | EPA Formal Action |
| 2025-06-18 | EPA Formal Action |
| 2025-06-13 | State Order Extension |
| 2025-04-14 | State Order Extension |
| 2024-11-22 | State Informal Action |
| 2024-07-22 | State Order Extension |
| 2024-03-11 | State Order Extension |
| 2024-02-22 | State Order Extension |
| 2024-02-20 | State Order Extension |
| 2023-11-08 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-09-18.
Riverton vs. Nearby Wyoming Cities
How Riverton's water quality compares to similar cities in Wyoming:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Riverton | D | 26 | 5 | 11,250 |
| Green River | C | 3 | 5 | 12,234 |
| Wapiti | D | 0 | 1 | 10,224 |
| Mills | C | 6 | 5 | 9,986 |
Common Questions About Riverton Water
These are the most common questions residents search for about water quality in Riverton, Wyoming:
Is Riverton water hard or soft? Water hardness varies by source. Riverton's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Riverton tap water? Riverton's water receives a grade of D (54/100). There are 7 health-based violations — consider filtration.
What is the best water filter for Riverton? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Riverton vs. Wyoming Average
Understanding how Riverton compares to the broader Wyoming 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 Riverton.
ZIP Codes in Riverton
Riverton spans 1 ZIP code. The ZIP with the lowest water quality score is 82501. 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.