Water Quality in Charlestown, NH: 1 Violation — Grade C
Grade C · Score 58/100 · 4 water systems · Updated 2026-05-03
Charlestown's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Charlestown, NH — 1 compliance event documented in the federal drinking water record.
Water Quality by ZIP Code in Charlestown
Water quality varies across Charlestown's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 03603 | C | 58 | 1 | 0 | View report → |
Water Quality Overview
Charlestown, New Hampshire receives a water quality grade of C with an overall score of 58 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 4 water systems serving Charlestown have accumulated 1 EPA violations (all monitoring/reporting type). These violations are tracked across 1 ZIP codes serving approximately 3,138 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Charlestown's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Charlestown water systems is 0.0190 mg/L — this exceeds the EPA action level of 0.015 mg/L. 1 ZIP code exceed the EPA lead action level.
With 70% of homes built before 1986, Charlestown 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
Charlestown is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving Charlestown
Charlestown is served by 4 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 3,138 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 2 enforcement actions against water systems serving Charlestown. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Charlestown
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 Charlestown Water Systems
The following contaminants have been detected or caused violations across Charlestown's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Surface Water Treatment Rule | Treatment Technique | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 2 enforcement actions against water systems serving Charlestown. Recent actions:
| Date | Action Type |
|---|---|
| 2021-08-02 | State Order Extension |
| 2021-07-21 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2021-08-02.
Charlestown vs. Nearby New Hampshire Cities
How Charlestown's water quality compares to similar cities in New Hampshire:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Charlestown | C | 1 | 4 | 3,138 |
| Henniker | D | 1 | 3 | 3,149 |
| Waterville Valley | B | 1 | 1 | 3,150 |
| New London | B | 0 | 3 | 3,083 |
Common Questions About Charlestown Water
These are the most common questions residents search for about water quality in Charlestown, New Hampshire:
Is Charlestown water hard or soft? Water hardness varies by source. Charlestown's 4 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Charlestown tap water? Charlestown's water receives a grade of C (58/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Charlestown? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Charlestown vs. New Hampshire Average
Understanding how Charlestown compares to the broader New Hampshire 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 Charlestown.
ZIP Codes in Charlestown
Charlestown spans 1 ZIP code. The ZIP with the lowest water quality score is 03603. 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.