Aquarion-eastern Fairfield County
EPA ID: CT0150011 · 351,756 people served · 42 ZIP codes
Within the EPA compliance database, Aquarion-eastern Fairfield County shows 2 violations still pending resolution — a status that applies across the full service territory of approximately 351,756 people and reflects findings that have not yet cleared the federal enforcement process or received formal closure.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 3 (2021) to 6 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Aquarion-eastern Fairfield County Source: EPA SDWIS service area boundaries.
Service area boundary — Grade D
Service Area Demographics
The Aquarion-eastern Fairfield County serves a community with a median household income of $138,559 and an estimated 850,607 residents across its service area. Approximately 76% 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-eastern Fairfield County's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Detected Contaminants
How Aquarion-eastern Fairfield County compares to EPA limits
What This Means For You
Contaminant 1009 at 1 mg/L exceeds the EPA maximum of 0.004 mg/L. Intestinal damage, bone damage. Consider reverse osmosis filtration.
Haloacetic Acids (HAA5) at 2 mg/L exceeds the EPA maximum of 0.06 mg/L. Cancer risk; reproductive & developmental effects. Consider granular activated carbon (GAC) filtration.
Total Trihalomethanes (TTHM) at 1 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Stage 1 DBP Rule at 11 mg/L exceeds the EPA maximum of mg/L.
Consumer Confidence Report Rule at 11 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. 221 detections recorded. 69 exceed federal EPA limits (4 ppt for PFOA/PFOS). 2 exceed state limits.
Contaminant 1009 was detected in this water system. reverse osmosis 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-EASTERN FAIRFIELD COUNTY (EPA ID: CT0150011) is a community water system in Connecticut that serves approximately 351,756 people from surface water sources.
This system provides water to 42 ZIP codes across 25 communities.
Average Home Safety Score: D (48/100)
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, 2025 | Surface Water Treatment Rule | Monitoring | Resolved |
| April 10, 2025 | Lead and Copper Rule | Monitoring | Resolved |
| November 1, 2024 | Contaminant 0700 | Monitoring | Resolved |
| November 1, 2024 | Contaminant 0700 | Health-based | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Unresolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Unresolved |
| September 29, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| August 10, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| June 1, 2024 | Contaminant 1009 | Monitoring | Resolved |
| March 31, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| December 30, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| November 17, 2023 | Consumer Confidence Report Rule | Health-based | Resolved |
| October 1, 2023 | Contaminant 0700 | Monitoring | Resolved |
| August 10, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| August 1, 2023 | Total Coliform | Monitoring | Resolved |
| July 1, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| July 1, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| April 1, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| March 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Failure | 11 | No |
| Consumer Confidence Report Rule | Reporting Failure | 11 | Yes |
| Surface Water Treatment Rule | Treatment Failure | 6 | No |
| Lead and Copper Rule | Treatment Failure | 5 | No |
| Revised Total Coliform Rule | Microbiological | 5 | No |
| Contaminant 1017 | Other Violation | 4 | No |
| Nickel | Inorganic | 4 | No |
| Gross Alpha | Radionuclides | 3 | No |
| Contaminant 0700 | Other Violation | 3 | Yes |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 2 | No |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Contaminant 1009 | Other Violation | 1 | No |
| Contaminant 1045 | Other Violation | 1 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 1 | No |
| Total Coliform | Microbiological | 1 | No |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 06468 | 0.003 mg/L | No | N/A |
| 06853 | 0.003 mg/L | No | N/A |
| 06901 | 0.002 mg/L | No | N/A |
| 06902 | 0.002 mg/L | No | N/A |
| 06903 | 0.002 mg/L | No | N/A |
| 06905 | 0.002 mg/L | No | N/A |
| 06906 | 0.002 mg/L | No | N/A |
| 06907 | 0.002 mg/L | No | N/A |
| 06824 | 0.0018 mg/L | No | N/A |
| 06825 | 0.0018 mg/L | No | N/A |
| 06484 | 0.0017 mg/L | No | N/A |
| 06830 | 0.0012 mg/L | No | N/A |
| 06831 | 0.0012 mg/L | No | N/A |
| 06482 | 0.00091 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 1 (High 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: 41 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 1 additional ZIP inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
This system serves 42 ZIP codes:
06418 · 06468 · 06470 · 06482 · 06484 06604 · 06605 · 06606 · 06607 · 06608 06610 · 06611 · 06612 · 06614 · 06615 06801 · 06807 · 06820 · 06824 · 06825 06830 · 06831 · 06840 · 06850 · 06851 06853 · 06854 · 06855 · 06870 · 06877 06878 · 06880 · 06883 · 06890 · 06896 06897 · 06901 · 06902 · 06903 · 06905 06906 · 06907
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Aquarion-eastern Fairfield County (CT0150011) on EPA.gov.
Frequently Asked Questions
Is Aquarion-eastern Fairfield County water safe to drink?
Aquarion-eastern Fairfield County has recorded 2 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-eastern Fairfield County serve?
Aquarion-eastern Fairfield County serves approximately 351,756 people across 42 ZIP codes in Connecticut.
Where does Aquarion-eastern Fairfield County get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Above Current MCL
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). One or more PFAS compounds were measured above 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-eastern Fairfield County (EPA ID: CT0150011) — request the latest Consumer Confidence Report or ask about specific contaminants.