Newport County, Rhode Island: drinking water report. Newport County on Rhode Island's southern coast has about 83,000 residents in communities including…
Newport County on Rhode Island's southern coast has about 83,000 residents in communities including Newport, Middletown, and Portsmouth. Aquidneck Island, which comprises most of the county's population, draws water from surface reservoirs and groundwater. Naval Station Newport – the Navy's primary officer training facility – occupies a significant portion of the island's northern end.
Naval Station Newport has confirmed PFAS contamination from AFFF use during fire training exercises. According to the Navy's 2024 environmental investigation, monitoring wells near the base show PFOS at 38 ppt. The contamination has migrated off-base, and Rhode Island DEM's 2024 investigation found PFAS in private wells in adjacent Middletown at concentrations up to 25 ppt.
Rhode Island has adopted a PFAS standard of 20 ppt for combined PFOS and PFOA. The Newport Water Division's reservoir supply has shown PFAS below this threshold in routine monitoring, but the proximity of the naval station to residential areas means groundwater users face more direct exposure. Saltwater intrusion also threatens island wells – chloride concentrations have been rising in production wells near the coast.
Newport County residents on private wells, particularly on Aquidneck Island near the naval station, should prioritize PFAS testing. The island's limited groundwater resources make every well's quality consequential.
Check your water for data at your address. For PFAS and coastal minerals, reverse osmosis handles both. Our water filter guide covers systems designed for coastal and military-adjacent scenarios. Pull your detailed report for local data, and visit our Rhode Island page for statewide patterns.
Drinking water is one exposure route. These federal datasets also cover Newport County, RI.
The EPA places Newport County, RI in Zone 2 - a moderate-risk category, with a predicted average indoor radon level between 2 and 4 pCi/L. Zone maps predict an area's radon potential from geology and existing indoor readings; they say nothing about a specific house. Testing is the only way to know your own level.
69% of homes in Newport County, RI were built before 1980, and 37% before 1950. Residential lead paint was banned in 1978, so housing age is the strongest available proxy for lead-paint exposure. This describes the county's housing stock, not any one home.
Modelled annual fine-particle pollution (PM2.5) in Newport County, RI averages 5 µg/m³, within the EPA's annual standard of 9 µg/m³. These are CDC modelled county estimates rather than readings from a specific monitor.
How radon zones work · Air quality by county · Lead exposure guide
10 public water systems serving Newport County, RI have EPA lead testing on record. The reported lead sample skews toward systems that already flagged a problem, so its exceedance rate is not directly comparable with other areas. 4 water systems serving Newport County, RI carry a health-based EPA Safe Drinking Water Act violation.
| Most-cited violation type | Systems affected |
|---|---|
| Total Trihalomethanes (TTHM) | 1 |
| Revised Total Coliform Rule | 1 |
| Lead and Copper Rule | 1 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 1 |
| Chlorine Dioxide | 1 |
Source: EPA Lead and Copper Rule 90th-percentile tap sampling and EPA SDWIS Safe Drinking Water Act enforcement records, aggregated from the public water systems serving this county. Figures are counts of water systems, not a test of any individual home or tap.