Lower Connecticut River Valley Planning Region, CT: EPA's radon zone, explained

Lower Connecticut River Valley Planning Region falls outside what EPA's 1993 radon zone map can rate directly, because its boundaries were redrawn after the map was made — the coverage gaps guide explains exactly which counties this affects and why.

Where Lower Connecticut River Valley Planning Region sits nationally

Lower Connecticut River Valley Planning Region, Connecticut is home to about 177,540 people across 424.121 square miles. Population density there runs about 419 people per square mile.

What this actually means for a house in Lower Connecticut River Valley Planning Region

EPA's 4 pCi/L action level and the roughly 1.3 pCi/L national indoor average apply to Lower Connecticut River Valley Planning Region the same as anywhere, even without a zone rating to place it against. EPA's guidance is unchanged by the absence of a zone rating here: test every home, since a zone (where one exists) only describes a county-wide average, never an individual house.

Next steps for a home in Lower Connecticut River Valley Planning Region

For a Lower Connecticut River Valley Planning Region homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Connecticut's state radon program

For Lower Connecticut River Valley Planning Region, an ongoing number beats a one-time test - a Airthings radon monitor tracks Lower Connecticut River Valley Planning Region's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Lower Connecticut River Valley Planning Region's figures come from

Lower Connecticut River Valley Planning Region's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Lower Connecticut River Valley Planning Region is one of a specific, documented set of counties EPA's map predates — the coverage gaps guide names every one.