F0/100
Hillsboro Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,300 residents · New Hampshire
What's In Hillsboro's Tap Water?
0
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
No contaminant data available for this system.
No contaminant testing data available for this utility.
EPA Violation History
4
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2024 – October 1, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2024 – October 1, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: November 10, 2021 – December 7, 2021Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2021 – November 1, 2021Rule: 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
EMERALD LAKE
Population Served
1,300
Water Source
Groundwater
System ID
NH1141020
Frequently Asked Questions About Hillsboro Water
Is Hillsboro tap water safe to drink?
Hillsboro, New Hampshire tap water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA maximum contaminant levels and 50 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Hillsboro's water?
0 contaminants were tested in Hillsboro's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Hillsboro have any water quality violations?
Yes, Hillsboro has 50 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, RPT, MON. 31 of these are health-based violations, which are the most serious category.
Do I need a water filter in Hillsboro?
Hillsboro 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. All contaminants are within health goals.
Where does Hillsboro's tap water come from?
Hillsboro's drinking water is sourced from groundwater and supplied by EMERALD LAKE. The system serves approximately 1,300 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Hillsboro'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. Hillsboro'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 Hillsboro's water compare to other cities in New Hampshire?
Hillsboro's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our New Hampshire state page to see how all cities in the state compare.
What should I do if I'm concerned about Hillsboro's water quality?
If you have concerns about Hillsboro'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 (EMERALD LAKE) 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.