Lead In Drinking Water In Connecticut
What residents of Connecticut need to know about lead in drinking water — including how it enters water, which utilities have documented violations, and what steps to take.
Source: EPA SDWIS, Connecticut Department of Public Health (CT DPH), CDC · Last reviewed: 2025-01-01
Quick Answer
Is lead in drinking water a real concern in Connecticut?
Yes — Connecticut has one of the oldest housing stocks in the nation. Hartford, New Haven, Bridgeport, and Waterbury have dense concentrations of pre-1920 housing with lead service lines and lead solder throughout.
Is this mostly a public-water issue, a private-well issue, or both?
Both public water system service lines and household plumbing; Connecticut's urban centers have some of the oldest water infrastructure in New England.
What is the main reason residents should care?
Connecticut's aging industrial cities — Hartford, Bridgeport, New Haven, Waterbury, and New Britain — have very high concentrations of housing built before 1940, when lead plumbing materials were standard. Connecticut's naturally soft surface water and some groundwater sources are corrosive to lead-bearing materials.
Key Facts
| Federal Lead Action Level | 15 µg/L — no safe level per CDC |
| Housing stock age | Among the oldest in New England — Hartford, New Haven, Bridgeport have dense pre-1920 housing |
| Water chemistry | Reservoir-fed surface water is naturally soft — more corrosive toward lead |
| Urban risk | Highest concentration of risk in older multifamily rental housing in major cities |
| State oversight | Connecticut Department of Public Health (CT DPH) |
Why This Matters in Connecticut
Connecticut's major cities grew rapidly during the Industrial Revolution, creating dense urban housing built long before federal lead bans. Hartford's North End, Bridgeport's South End, New Haven's Newhallville neighborhood, and Waterbury's older core have some of the highest concentrations of pre-1940 housing in New England — meaning lead service lines and lead solder are common throughout the distribution and household plumbing systems. Connecticut's water, largely drawn from reservoirs fed by granite terrain, tends to be naturally soft and low-mineral, increasing its tendency to dissolve lead from older plumbing. CT DPH has been proactive in requiring utilities to identify and inventory lead service lines under the LCRR.
Connecticut Utilities With Lead Violation Records
The utilities listed below have at least one lead violation on record in EPA's SDWIS database. Violations may be open or resolved — see individual utility pages for current status and risk level.
Regional Water Authority
Connecticut · 418,900 served
Metropolitan District Commission
Berlin,Bloomfield,Cromwell,East Granby,East Hartford,Farmington,Glastonbury,Hartford,Manchester,Newington,Portland,Rocky Hill,South Windsor,West Hartford,Wethersfield,Windsor,Windsor Locks · 390,887 served
Aquarion-eastern Fairfield County
Beacon Falls,Bridgeport,Darien,Easton,Fairfield,Greenwich,Monroe,New Canaan,Newtown,Norwalk,Redding,Ridgefield,Seymour,Shelton,Stamford,Stratford,Trumbull,Weston,Westport,Wilton · 351,756 served
Aquarion-stamford
Connecticut · 119,214 served
Waterbury Water Department
Connecticut · 107,271 served
New Britain Water Department
Berlin,Farmington,New Britain,Newington,Plainville,West Hartford · 73,534 served
Danbury Water Department
Connecticut · 62,055 served
Meriden Water Division
Berlin,Cheshire,Meriden,Southington,Wallingford · 58,441 served
Aquarion-greenwich
Connecticut · 53,297 served
Southington Water Department
Connecticut · 43,069 served
How Lead Gets Into Drinking Water
Lead service lines
The pipe connecting a home to the water main may be made of lead, especially in pre-1986 construction. Water sitting in these lines can accumulate lead before it reaches the tap.
Lead solder
Lead solder at pipe joints was banned for potable water systems in 1986. Homes built before that date — including significant portions of older Connecticut cities — may still have lead solder throughout their plumbing.
Older brass fixtures
Faucets, valves, and fixtures with high lead content were common before the 2014 revision of 'lead-free' standards. Replacing older fixtures at kitchen and drinking taps can meaningfully reduce exposure.
Corrosive water chemistry
Soft, acidic, or low-alkalinity water dissolves lead from plumbing more readily. Utilities use orthophosphate and other corrosion control treatments, but household plumbing after the meter is not within their control.
Who Should Pay Closest Attention
Children in Hartford, Bridgeport, New Haven, and Waterbury — particularly in older rental housing — face the highest risk. Connecticut's rental market in older cities means tenants often have no visibility into the age or material of building plumbing. Families with children under six in any pre-1940 Connecticut home should consider certified filtration.
Families with children under six
Pregnant residents
Households in homes built before 1986
Renters who cannot inspect building plumbing
Residents on a confirmed lead service line
Households that had plumbing work done recently (disturbances dislodge protective scale)
How to Check Your Situation in Connecticut
- 1
Identify your water utility. Use the ZIP lookup below or browse the Connecticut utility directory on this site.
- 2
Read your utility's page on this site to see its current risk level and any open lead violations.
- 3
Contact your utility and ask for your address-level service line material status. Under the federal Lead and Copper Rule Revisions (LCRR), utilities must maintain and provide this information.
- 4
Review your utility's most recent Consumer Confidence Report (CCR) — mailed annually or available on the utility's website.
- 5
Consider testing your tap water at a Connecticut Department of Public Health (CT DPH)-certified lab. Your state health department or Connecticut Department of Public Health (CT DPH) maintains a list of certified labs.
- 6
If you have young children or are pregnant, install a certified NSF/ANSI 53 or 58 filter at the kitchen tap as a precautionary measure.
Treatment Options
Boiling does not remove lead. Use a certified filter for drinking and cooking water.
NSF/ANSI Standard 53 — Activated Carbon Block
Under-sink or pitcher filters certified to Standard 53 are independently verified to reduce lead. Replace filters on the manufacturer's schedule — an overdue filter may not perform as certified.
NSF/ANSI Standard 58 — Reverse Osmosis
RO systems certified to Standard 58 remove 95–99% of lead and a broad range of contaminants. Requires under-sink installation. More comprehensive than Standard 53 for households with multiple contaminant concerns.
Flushing — temporary mitigation only
EPA recommends flushing the cold tap for 30 seconds to 2 minutes if water has sat in pipes for 6+ hours. Not a substitute for certified filtration or service line replacement.
Frequently Asked Questions
Related Pages
Lead — National Overview
All U.S. utilities with lead records
Connecticut State Overview
All utilities and water quality data
Nitrate in Drinking Water
A separate but common concern
Reverse Osmosis Guide
Removes 95–99% of lead
Activated Carbon Filter Guide
NSF/ANSI 53 certified options
All Contaminants
Complete reference library
Data Sources & Provenance
All data on this page is sourced from official U.S. government or public datasets.
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Connecticut Department of Public Health (CT DPH) ↗