Water Quality in Mammoth Spring, AR: 130 Violations — Grade D
Grade D · Score 45/100 · 2 water systems · Updated 2026-05-03
Mammoth Spring's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Water systems in Mammoth Spring, AR have accumulated 130 EPA violations across the full compliance record — a dataset that captures reportable health-based exceedances, monitoring lapses, and enforcement actions filed with the federal Safe Drinking Water Information System.
Water Quality by ZIP Code in Mammoth Spring
Water quality varies across Mammoth Spring's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 72554 | D | 45 | 130 | 26 | View report → |
Violation Trend
EPA violations recorded for water systems serving Mammoth Spring.
Water Quality Overview
Mammoth Spring, Arkansas receives a water quality grade of D with an overall score of 45 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 2 water systems serving Mammoth Spring have accumulated 130 EPA violations, including 26 health-based violations. These violations are tracked across 1 ZIP codes serving approximately 1,829 people.
What Grade D Means
A grade of D indicates significant compliance issues. Mammoth Spring'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
Lead testing data for Mammoth Spring is currently being collected. The EPA requires all community water systems to test for lead under the Lead and Copper Rule.
With 53% of homes built before 1986, Mammoth Spring 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
Mammoth Spring is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving Mammoth Spring
Mammoth Spring is served by 2 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 1,829 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 Mammoth Spring. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Mammoth Spring
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 Mammoth Spring Water Systems
The following contaminants have been detected or caused violations across Mammoth Spring's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Chlorine residual | Disinfectant | 4 mg/L | 25 | 1 | Yes |
| Lead and Copper Rule | Treatment Technique | N/A | 17 | 1 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 1 | 1 | No |
| Revised Total Coliform Rule | Microbiological | 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 Mammoth Spring:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2024 | 8 | 8 |
| 2025 | 7 | 7 |
Violations have decreased from 8 in 2024 to 7 in 2025, indicating improving compliance.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Mammoth Spring. Recent actions:
| Date | Action Type |
|---|---|
| 2025-03-12 | State Order Extension |
| 2024-12-11 | State Informal Action |
| 2024-09-10 | State Informal Action |
| 2024-09-10 | State Order Extension |
| 2024-07-31 | State Formal Action |
| 2023-10-30 | State Filed Motion |
| 2023-09-15 | State Filed Suit |
| 2023-08-22 | State Informal Action |
| 2023-07-25 | State Filed Judgment |
| 2023-07-20 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-03-12.
Mammoth Spring vs. Nearby Arkansas Cities
How Mammoth Spring's water quality compares to similar cities in Arkansas:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Mammoth Spring | D | 130 | 2 | 1,829 |
| Alix | C | 0 | 1 | 1,820 |
| Altus | A | 1 | 1 | 1,820 |
| Garfield | B | 1 | 2 | 1,808 |
Common Questions About Mammoth Spring Water
These are the most common questions residents search for about water quality in Mammoth Spring, Arkansas:
Is Mammoth Spring water hard or soft? Water hardness varies by source. Mammoth Spring's 2 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Mammoth Spring tap water? Mammoth Spring's water receives a grade of D (45/100). There are 26 health-based violations — consider filtration.
What is the best water filter for Mammoth Spring? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Mammoth Spring vs. Arkansas Average
Understanding how Mammoth Spring compares to the broader Arkansas 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 Mammoth Spring.
ZIP Codes in Mammoth Spring
Mammoth Spring spans 1 ZIP code. The ZIP with the lowest water quality score is 72554. 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.