Well Water in Suffolk County: What to Test and Why

Suffolk County's groundwater contains arsenic, chloride, fluoride, lead, manganese, nitrate, nitrite, sulfate, iron, and PFAS chemicals. Multiple contaminants exceed EPA health standards, making testing and treatment important for well owners.

These contaminants come from mixed sources. Iron and manganese dissolve naturally from the sand and rock layers that hold the water. Nitrate and nitrite enter from septic systems and fertilizer use across the county's developed areas. Chloride comes from road salt and coastal saltwater intrusion near the shoreline. Arsenic and lead are present in the underlying rock. PFAS chemicals came from industrial sites, airports, and firefighting training areas.

Groundwater in Suffolk County is soft, with elevated iron as the main aesthetic characteristic. Iron concentrates here because the sand and gravel that store the water naturally release it as water moves through. Most wells across the county show detectable iron levels, though amounts vary from well to well.

Suffolk County wells show arsenic, lead, nitrate, nitrite, and PFAS chemicals like PFOA and PFOS at levels above EPA health standards. Arsenic and lead are poisons that build up in your body over time and harm your brain, kidneys, and bones. Nitrate and nitrite turn into harmful chemicals in your stomach and can be especially dangerous for babies. PFAS chemicals do not break down in nature or your body and have been linked to liver damage, thyroid problems, and immune system issues.

Iron at moderate levels in county wells can leave orange or brown stains on sinks, toilets, and laundry. You may notice a metallic taste in your water or see rust-colored buildup inside pipes and appliances. The water in this county is soft, so you should not have heavy scale buildup, but iron staining is a real nuisance that affects your home's appearance and cleanliness.

Testing your well is the only way to know what contaminants are actually in your water at your location. Your well may have higher or lower levels than what is common across the county. We recommend a comprehensive panel that tests for metals, minerals, bacteria, and PFAS chemicals since multiple contaminants exceed health standards here--this typically costs two hundred to four hundred dollars. Treatment options like reverse osmosis systems or activated carbon filters can remove many of these contaminants once you know what you are dealing with.