New Haven's drinking water – supplied by the Regional Water Authority – meets all current federal and Connecticut state standards, including the EPA's 2024 PFAS limits. Testing under the EPA's UCMR5 program detected PFAS compounds at levels below the new maximum contaminant levels. But 'below the limit' doesn't mean zero. Here's what the actual data shows, and what New Haven residents can do right now.
The Regional Water Authority (RWA) serves New Haven and more than 20 surrounding towns across South Central Connecticut. The system draws from a network of surface reservoirs, primarily Lake Saltonstall (on the Branford-East Haven border), Lake Gaillard in North Branford, and Lake Whitney in Hamden. These are surface water sources, which means they're filtered and treated before reaching your tap – but they're also more exposed to runoff from surrounding land than deep aquifer sources.
Connecticut has long treated water quality seriously. The state Department of Public Health enforces standards that match federal EPA rules, and RWA publishes an annual Consumer Confidence Report (CCR) that details what was found in the water that year.
PFAS – per- and polyfluoroalkyl substances, often called forever chemicals – are synthetic compounds used in nonstick cookware, firefighting foam, food packaging, and hundreds of industrial applications since the 1940s. They accumulate in the environment because they don't break down. The EPA's UCMR5 program (Unregulated Contaminant Monitoring Rule, 5th round) required utilities across the US to test for PFAS compounds between 2023 and 2025, providing the most comprehensive national picture of PFAS in tap water to date.
RWA participated in UCMR5 testing. The program measured 29 individual PFAS compounds. For context: the EPA's April 2024 rule set enforceable limits (Maximum Contaminant Levels, or MCLs) of 4 parts per trillion (ppt) for PFOA and PFOS individually, 10 ppt for PFNA, PFHxS, and HFPO-DA, and a hazard index calculation for mixtures of those last three compounds.
According to EPA data, RWA detected PFAS in the system at low levels. The concentrations are below the new MCLs – meaning the utility is currently in compliance. But the EPA acknowledges there is no known completely safe level of PFAS exposure; the 4 ppt limit reflects what current treatment technology can reasonably achieve, not a biological threshold.
To check the specific PFAS levels reported for your New Haven zip code, use the KnowYourExposure lookup tool – it pulls directly from EPA UCMR5 data and shows you exactly what was detected in your water system.
Lead contamination is a different animal from PFAS. The EPA's Lead and Copper Rule addresses lead in drinking water, but here's the thing: lead contamination usually doesn't come from the source water or the treatment plant. It comes from lead service lines and lead solder in older home plumbing.
New Haven is an older city – much of the housing stock predates 1986, when the Safe Drinking Water Act amendments banned lead solder in new plumbing. Homes built before 1986, and especially before 1978, may have lead service lines or lead solder at fixtures. The RWA's water tests negative for lead at the treatment plant. But by the time water travels through older municipal lines and your home's pipes, the result can be different.
If you're in an older building – especially a pre-1950s home or a multi-family rental – testing your own tap water for lead is the only way to know for certain. The state of Connecticut runs programs to help residents test for free in some cases.
This is worth sitting with for a moment. Meeting EPA standards is genuinely good news – it means RWA's treatment processes are working, and the utility is doing its job. But the 2024 PFAS MCLs didn't arise from research showing those levels are safe for everyone. They reflect feasibility: what water treatment can reliably achieve at scale.
A 2023 analysis in the journal Environmental Science & Technology found that PFOA and PFOS levels above 0.1 ppt – far below the EPA's 4 ppt limit – are associated with measurable changes in immune function in children. The National Academies of Sciences, Engineering, and Medicine reached similar conclusions in a 2022 report, recommending that any detectable PFAS exposure be treated as a concern for sensitive populations, including pregnant women, infants, and people with immune conditions.
That's not a reason to panic. It's a reason to understand what's actually in your water and make an informed decision about filtration.
If you want to reduce your PFAS exposure from tap water, the most effective options are:
Reverse osmosis filtration removes 90-99% of PFAS compounds. Under-sink RO systems like the iSpring RCC7 or the Waterdrop G3 are effective and don't require whole-house installation. They cost $150-350 upfront and roughly $50-100/year in filter replacements.
Activated carbon pitcher filters (Brita, ZeroWater, Clearly Filtered) reduce PFAS by 50-90% depending on the filter model and contaminant. Clearly Filtered claims NSF/ANSI 53 and 58 certification for PFAS removal – check the certification claims specifically for the filters you're considering.
Point-of-use carbon block filters (mounted under the sink or at the faucet) provide solid PFAS reduction at moderate cost, without the slower flow rate of RO systems.
For lead specifically: if you're in an older building, pitcher filters with NSF/ANSI 53 certification for lead are effective. RO systems also remove lead.
Before investing in filtration, check your specific address data. The tool shows what EPA testing actually found in your water system – so you can choose a filter based on what's actually in your water, not general anxiety about water quality.
New Haven's tap water is in compliance with all current federal and Connecticut standards. PFAS were detected at low levels under UCMR5 testing, but below the EPA's 2024 MCLs. Lead risk depends on your specific building's plumbing age more than on source water quality.
If you have young children, are pregnant, or have immune-system concerns, the research supports reducing PFAS exposure wherever you can. A certified pitcher filter is a reasonable first step. An under-sink RO system removes more contaminants and is a better long-term investment.
Check your zip code to see the exact PFAS levels reported for your water system – and to get a detailed report if you want to go deeper.
Is New Haven tap water safe to drink in 2026? New Haven's water, supplied by the Regional Water Authority, meets all current EPA and Connecticut state standards as of 2026. UCMR5 testing detected PFAS compounds at levels below the EPA's 2024 maximum contaminant levels. but researchers note there is no established safe level of PFAS exposure for sensitive populations including pregnant women and young children.
Does New Haven tap water have PFAS? Yes, low levels of PFAS were detected in the Regional Water Authority's system during EPA UCMR5 testing. The concentrations are below the EPA's 2024 maximum contaminant levels of 4 parts per trillion for PFOA and PFOS. To see the specific numbers for your zip code, check KnowYourExposure.com.
What water system serves New Haven, Connecticut? The Regional Water Authority (RWA), formerly known as the South Central Connecticut Regional Water Authority, provides drinking water to New Haven and more than 20 surrounding towns. The system draws from surface reservoirs including Lake Saltonstall, Lake Gaillard, and Lake Whitney.
What water filter removes PFAS from New Haven tap water? Reverse osmosis systems are the most effective, removing 90-99% of PFAS compounds. Under-sink RO units typically cost $150-350 plus annual filter replacement. Certified pitcher filters (look for NSF/ANSI 53 and 58 certification claims specific to PFAS) offer a lower-cost option that removes 50-90% of PFAS.
Does New Haven water have lead? The Regional Water Authority's source water and treatment plant test negative for lead. However, lead exposure in New Haven most often comes from lead service lines and lead solder in older home plumbing, not from the utility itself. Homes built before 1986 carry higher risk. Testing your own tap water is the only way to confirm lead levels in your specific home.