Water Quality in 06340 — Groton, CT
EPA data for GROTON UTILITIES
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 06340 in Groton, Connecticut is served by 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.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| August 10, 2025 | Surface Water Treatment Rule | Monitoring | Unresolved |
| July 1, 2025 | Surface Water Treatment Rule | Monitoring | Resolved |
| February 1, 2025 | Contaminant 1009 | Monitoring | Unresolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| March 31, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| March 31, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| September 29, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| September 29, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| September 29, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| September 29, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| August 10, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| August 10, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Surface Water Treatment Rule | Treatment Technique | 14 | No |
| Stage 1 DBP Rule | Treatment Technique | 13 | No |
| Lead and Copper Rule | Treatment Technique | 2 | No |
| Contaminant 1009 | Other | 1 | No |
Need help with your water quality?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| GROTON UTILITIES | CT0590011 | 30,200 | Surface water |
| GROTON LONG POINT ASSOCIATION | CT0590051 | 2,400 | Surface water |
| NOANK FIRE DISTRICT | CT0590031 | 1,947 | Surface water |
| MYSTIC VILLAGE APARTMENTS | CT0590071 | 66 | Groundwater |
| NEIGHBORS OF ROGERS, LLC | CT0597021 | 57 | Groundwater |
What You Can Do
- Review your annual Consumer Confidence Report (CCR) — Your utility publishes this each July
- Test your home’s water — Especially if you have older plumbing (pre-1986) that may contain lead
- Stay informed — Bookmark this page to check for updates on your water quality
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in Connecticut
- 06001 (Avon) — 6 violations
- 06002 (Bloomfield) — 45 violations
- 06010 (Bristol) — 10 violations
- 06030 (Farmington) — 3 violations
- 06040 (Manchester) — 41 violations
- 06050 (New Britain) — 2 violations
- 06078 (Suffield)
- 06082 (Enfield) — 54 violations
- 06101 (Hartford) — 2 violations
- 06108 (East Hartford) — 32 violations
- 06109 (Wethersfield) — 3 violations
- 06111 (Newington) — 27 violations
- 06232 (Andover) — 40 violations
- 06278 (Ashford) — 65 violations
- 06330 (Baltic) — 7 violations
- 06405 (Branford) — 2 violations
- 06408 (Cheshire) — 27 violations
- 06450 (Meriden) — 8 violations
- 06457 (Middletown) — 20 violations
- 06492 (Wallingford) — 252 violations
Nearby Water Quality Reports
- 02804 (Ashaway, RI) — 15 mi — 246 violations
- 02833 (Hopkinton, RI) — 17 mi — 465 violations
- 06330 (Baltic) — 19 mi — 7 violations
- 02832 (Hope Valley, RI) — 20 mi — 1 violation
- 02813 (Charlestown, RI) — 21 mi — 232 violations
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for GROTON UTILITIES (CT0590011) on EPA.gov.
Frequently Asked Questions
Is the tap water in 06340 safe to drink?
Based on EPA records, the water system serving ZIP code 06340 has only monitoring/reporting violations, which are procedural in nature. However, individual home conditions (old pipes, well water) can affect quality.
Where does 06340’s water come from?
The primary water source for this area is surface water. GROTON UTILITIES serves approximately 30,200 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 06340 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 06340. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 06340?
Radon zone data is not available for ZIP code 06340. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.