C53/100
Madison Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,200 residents · New Hampshire
What's In Madison's Tap Water?
31
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.51 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
8
Violations (last 5yr)
3
Unresolved
5
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: May 12, 2025 – May 23, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: January 6, 2025 – January 14, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2025 – March 31, 2025Enforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2024 – December 31, 2024Enforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – February 8, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2023 – June 30, 2023Enforcement: Resolving — corrective action underway
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2023 – March 31, 2023Enforcement: 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
VILLAGE DISTRICT OF EIDELWEISS
Population Served
1,200
Water Source
Groundwater
System ID
NH1461010
Frequently Asked Questions About Madison Water
Is Madison tap water safe to drink?
Madison, New Hampshire tap water receives a grade of C (53/100), which is considered fair. 1 contaminant(s) exceed EPA maximum contaminant levels and 15 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Madison's water?
Of the 31 contaminants tested in Madison's water supply, the most notable include Copper (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Madison have any water quality violations?
Yes, Madison has 15 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MCL, MR. 6 of these are health-based violations, which are the most serious category.
Do I need a water filter in Madison?
Based on EPA data, using a water filter in Madison is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Madison's tap water come from?
Madison's drinking water is sourced from groundwater and supplied by VILLAGE DISTRICT OF EIDELWEISS. The system serves approximately 1,200 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Madison'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. Madison'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 Madison's water compare to other cities in New Hampshire?
Madison's water quality score of 53/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our New Hampshire state page to see how all cities in the state compare.
What should I do if I'm concerned about Madison's water quality?
If you have concerns about Madison'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 (VILLAGE DISTRICT OF EIDELWEISS) 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.