A83/100
Mammoth Spring Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,777 residents · Arkansas
What's In Mammoth Spring's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: May 1, 2022 – August 15, 2022Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
MAMMOTH SPRING WATERWORKS
Population Served
1,777
Water Source
Groundwater
System ID
AR0000206
Frequently Asked Questions About Mammoth Spring Water
Is Mammoth Spring tap water safe to drink?
Mammoth Spring, Arkansas tap water receives a grade of A (83/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Mammoth Spring's water?
Of the 1 contaminants tested in Mammoth Spring's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Mammoth Spring have any water quality violations?
Yes, Mammoth Spring has 14 EPA violation(s) on record, with the most recent in 2022. Violation types include RPT, MR, Other. None of these are classified as health-based violations.
Do I need a water filter in Mammoth Spring?
Mammoth Spring water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Mammoth Spring's tap water come from?
Mammoth Spring's drinking water is sourced from groundwater and supplied by MAMMOTH SPRING WATERWORKS. The system serves approximately 1,777 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Mammoth Spring's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Mammoth Spring's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Mammoth Spring's water compare to other cities in Arkansas?
Mammoth Spring's water quality score of 83/100 earns a grade of A, which is considered excellent. This places Mammoth Spring among the better-performing water systems in Arkansas. Visit our Arkansas state page to see how all cities in the state compare.
What should I do if I'm concerned about Mammoth Spring's water quality?
If you have concerns about Mammoth Spring's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (MAMMOTH SPRING WATERWORKS) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.