Aquarion Water/nh
EPA ID: NH1051010 · 34,000 people served · 9 ZIP codes
In the current EPA monitoring period, Aquarion Water/nh has 4 violations still listed as unresolved, with the utility supplying water to approximately 34,000 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 5 (2021) to 5 (2023). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Aquarion Water/nh Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Aquarion Water/nh serves a community with a median household income of $127,772 and an estimated 45,813 residents across its service area. Approximately 61% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Aquarion Water/nh's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 2% of homes in Grafton County, New Hampshire rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 74th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Detected Contaminants
How Aquarion Water/nh compares to EPA limits
What This Means For You
Total Trihalomethanes (TTHM) at 3 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Haloacetic Acids (HAA5) at 1 mg/L exceeds the EPA maximum of 0.06 mg/L. Cancer risk; reproductive & developmental effects. Consider granular activated carbon (GAC) filtration.
Barium at 8 mg/L exceeds the EPA maximum of 2 mg/L.
Stage 1 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 31 detections recorded. 12 exceed federal EPA limits (4 ppt for PFOA/PFOS).
Total Trihalomethanes (TTHM) was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Aquarion Water/nh (EPA ID: NH1051010) is a community water system in New Hampshire that serves approximately 34,000 people from groundwater sources.
This system provides water to 9 ZIP codes across 8 communities.
Average Home Safety Score: C (68/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2024 | Total Trihalomethanes (TTHM) | Monitoring | Resolved |
| October 1, 2023 | Consumer Confidence Report Rule | Health-based | Resolved |
| July 1, 2023 | Total Trihalomethanes (TTHM) | Monitoring | Resolved |
| April 1, 2023 | Barium | Health-based | Resolved |
| January 1, 2023 | Barium | Health-based | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Barium | Inorganic | 8 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 3 | No |
| Stage 1 DBP Rule | Treatment Failure | 2 | Yes |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 1 | No |
| Lead and Copper Rule | Treatment Failure | 1 | No |
| Consumer Confidence Report Rule | Reporting Failure | 1 | Yes |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 03771 | 0.001 mg/L | No | N/A |
| 03842 | 0.001 mg/L | No | N/A |
| 03843 | 0.001 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 7 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 2 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 03771 — Monroe
- 03842 — Hampton
- 03843 — Hampton
- 03844 — Hampton Falls
- 03862 — North Hampton
- 03870 — Rye
- 03871 — Rye Beach
- 03874 — Seabrook
- 03885 — Stratham
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Aquarion Water/nh (NH1051010) on EPA.gov.
Frequently Asked Questions
Is Aquarion Water/nh water safe to drink?
Aquarion Water/nh has recorded 8 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Aquarion Water/nh serve?
Aquarion Water/nh serves approximately 34,000 people across 9 ZIP codes in New Hampshire.
Where does Aquarion Water/nh get its water?
The primary water source is groundwater.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Aquarion Water/nh (EPA ID: NH1051010) — request the latest Consumer Confidence Report or ask about specific contaminants.