ZipCheckup grade for 06340: C.
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Groton, CT (06340): 1 Health-Based Violation Recorded for Mapped Water Systems - 55/100
EPA data combined for 5 water systems mapped to this ZIP (largest mapped system: Groton Utilities)
Health-based violation records by water system:
EPA records for the water systems mapped to 06340 in Groton, CT contain 26 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 1 are marked health-based.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water EPA records for water systems mapped to this ZIP show 1 health-based violation and 25 non-health-based (since 2021).
- Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; EPA's health goal for lead is zero.
- PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
- Radon EPA Zone 1 - highest county-level potential. This is not a home measurement; test before any threshold comparison.
- Flood 339 cumulative NFIP claim records. This historical count is not a current property-risk verdict.
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With 1 high-priority finding also on file, the single critical alert for Groton (06340) leads this record.
Score Breakdown
Overall Home Safety Score: 55/100
This is the published model score. Component and domain values are shown independently; they are not added together on this page.
Canonical components
Required domains
Coverage: 4 of 4 components and 3 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (8) CRITICAL
Your Water System
ZIP code 06340 in Groton, Connecticut is mapped to the water system Groton Utilities (EPA ID: CT0590011). This system provides water to approximately 30,200 people from surface water sources.
There are 5 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| Groton Utilities | CT0590011 | 30,200 | Surface water |
| Noank Fire District | CT0590031 | 1,947 | Surface water |
| Groton Long Point Association | CT0590051 | 2,400 | Surface water |
| Aquarion-mystic | CT1370011 | 10,788 | Surface water |
| Neighbors of Rogers, Llc | CT0597021 | 57 | Groundwater |
Other Water Quality Reports in Connecticut
- 06001 (Avon) - 2 violations recorded for mapped water systems
- 06002 (Bloomfield) - 44 violations recorded for mapped water systems
- 06006 (Windsor)
- 06010 (Bristol) - 7 violations recorded for mapped water systems
- 06011 (Bristol)
- 06013 (Burlington) - 2 violations recorded for mapped water systems
- 06016 (Broad Brook) - 2 violations recorded for mapped water systems
- 06018 (Canaan) - 3 violations recorded for mapped water systems
- 06019 (Canton)
- 06020 (Canton Center)
- 06021 (Colebrook)
- 06022 (Collinsville)
- 06023 (East Berlin) - 36 violations recorded for mapped water systems
- 06024 (East Canaan) - 3 violations recorded for mapped water systems
- 06025 (East Glastonbury)
- 06026 (East Granby) - 23 violations recorded for mapped water systems
- 06027 (East Hartland)
- 06028 (East Windsor Hill)
- 06029 (Ellington) - 1 violation recorded for mapped water systems
- 06030 (Farmington)
Nearby Water Quality Reports
- 06320 (New London) - 3 mi - 7 violations recorded for mapped water systems
- 06349 (Groton) - 3 mi
- 06355 (Mystic) - 4 mi - 7 violations recorded for mapped water systems
- 06388 (West Mystic) - 4 mi
- 06375 (Quaker Hill) - 4 mi - 4 violations recorded for mapped water systems
- 06385 (Waterford) - 5 mi - 9 violations recorded for mapped water systems
- 06335 (Gales Ferry) - 5 mi - 5 violations recorded for mapped water systems
- 06372 (Old Mystic) - 6 mi
- 06339 (Ledyard) - 7 mi - 9 violations recorded for mapped water systems
- 06390 (Fishers Island, NY) - 7 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Groton Utilities (CT0590011) on EPA.gov.
5 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 06340.
Detected compounds: PFBS.
Highest measured level: 0.004 µg/L
Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.
Environmental Hazards (10) HIGH
Home & Infrastructure (8) MODERATE
Possible home maintenance concerns - talk to a local expert.
Call (855) 384-4856Paid Partner This is a free service. You will be connected with an independent service provider. We may receive compensation.
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Groton
Based on local data for ZIP 06340, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Home & Flood Insurance
The ZIP code for this report in Groton has 339 FEMA flood claims on record. Standard homeowner policies don't cover flood damage - make sure you're protected.
Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote
Check Your Flood Zone (Free)FEMA flood map lookup - see if your property is in a flood zone
Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)
Gutter Installation & Repair
The median home in 06340 was built around 1975. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.
Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home
Estimate Your Home Maintenance CostsWindow Replacement
The median build year of homes in Groton is 1975; check the age and condition of your own windows. ENERGY STAR windows can save $101–$583/year on energy bills.
Typical cost: Window replacement: typically $300–$800 per window installed
Estimate Your Home Maintenance CostsRoofing Inspection & Repair
Homes built around 1975 may be on their second or third roof. A professional inspection can catch damage before leaks start.
Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500
Estimate Your Home Insurance NeedsService recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.
Frequently Asked Questions
Is the tap water in 06340 safe to drink?
EPA SDWIS records 26 violations since 2021 across the water systems mapped to ZIP 06340 (primary system: Groton Utilities), including 1 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 06340's water come from?
The recorded water source for Groton Utilities, a system mapped to ZIP code 06340, is Surface water. This system serves approximately 30,200 people.
How does Groton water compare to the national average?
Groton's Home Safety Score ranks lower than 87% of U.S. ZIP codes, and lower than 51% of ZIP codes within Connecticut.
How can I get my water tested in Groton?
If Groton Utilities supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
What is the radon risk for 06340?
06340 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in New London County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
Are there PFAS (forever chemicals) in 06340's water?
Yes, PFAS have been detected in samples from water systems mapped to 06340. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
What does the NFIP claim history show for ZIP 06340?
FEMA records contain 339 flood insurance claims filed in ZIP code 06340; the recorded rated-zone value (the most frequent one if there are several claims) is AE, which is claims evidence and may differ from the current FEMA map zone for a property. This is a substantial claim history, but claim count is not a count of distinct events or properties. Review FEMA's map for the specific property.
How to cite this page
ZipCheckup. (2026). Groton, CT (06340): 1 Health-Based Violation Recorded for Mapped Water Systems - 55/100. https://zipcheckup.com/report/06340/
@misc{zipcheckup-report-06340,
author = {{ZipCheckup}},
title = {{Groton, CT (06340): 1 Health-Based Violation Recorded for Mapped Water Systems - 55/100}},
year = {2026},
url = {https://zipcheckup.com/report/06340/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 06340
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 06320 | New London, CT | 2.5 mi | C | 7 |
| 06349 | Groton, CT | 3.4 mi | N/A | 0 |
| 06355 | Mystic, CT | 4.2 mi | C | 7 |
| 06388 | West Mystic, CT | 4.3 mi | N/A | 0 |
| 06375 | Quaker Hill, CT | 4.4 mi | N/A | 4 |
| 06385 | Waterford, CT | 4.6 mi | C | 9 |
| 06335 | Gales Ferry, CT | 5.0 mi | N/A | 5 |
| 06372 | Old Mystic, CT | 6.0 mi | N/A | 0 |
| 06339 | Ledyard, CT | 6.6 mi | N/A | 9 |
| 06390 | Fishers Island, NY | 6.8 mi | N/A | 0 |
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