Township, York County

Radon Mitigation in Fawn Township, PA

Updated September 30, 2026

Fawn Township is a township in York County with about 3,020 residents and 1,219 homes, median year built 1988. Fawn Grove borough sits inside the township. Payne's Folly and part of the Muddy Creek Forks Historic District are in the township. 65.2% of PA DEP radon tests in its ZIP codes came back at or above the action level, above the county's 52.5%.

What the PA DEP test records show for Fawn Township

ZIP codes don't follow township lines, so the 2 ZIP codes below also take in some homes just outside Fawn Township.

• ZIP 17321 (about 55% of Fawn Township's land): median 6.8 pCi/L across 460 tests, 20.4% at 20 or higher, top reading 196. Basement median 7.1, first floor 5.1.
• ZIP 17352 (about 35% of Fawn Township's land): median 7 pCi/L across 161 tests, 23.6% at 20 or higher, top reading 237. Basement median 6.9.

The spread inside Fawn Township runs from 64.8% of tests high in 17321 to 66.5% in 17352.

Half of the story is the median. The other half is the tail: 39.3% of tests here were 10 pCi/L or higher and 21.2% were 20 or higher. The top reading on record in these ZIP codes is 237 pCi/L. Neighboring houses can differ by a factor of ten, so none of this tells you what your house is. It tells you the odds are high enough that a $15 to $30 test kit is worth buying.

Tests people chose to run, not a random survey. Details on the York County radon levels page.

Basement readings versus first-floor readings

In ZIP 17321, basement tests have a median of 7.1 pCi/L, while tests taken on the first floor have a median of 5.1 pCi/L (39 first-floor tests). The gap is smaller than in most of the county, which means readings upstairs here are not much of a relief from the basement number.

This matters for what you test. The PA DEP and EPA guidance is to test the lowest level you use or could use as living space. If the basement is finished, or might be someday, test it there. A finished rec room at 7.1 pCi/L is a different decision from an unfinished storage basement you rarely stand in.

Housing in Fawn Township and what it means for a system

Census Bureau, American Community Survey 2020 to 2024:

93.5% of homes in Fawn Township are single-family detached. A detached house with a basement is the easiest layout to mitigate: one suction point through the slab, a fan outside or in the garage, and a vent above the roof line. It is the standard sub-slab depressurization job covered step by step on our mitigation process page, and it usually lands in the middle of the cost range.

Cost-wise, most houses in Fawn Township are the standard $800 to $1,500 sub-slab job, with block walls or a second suction point pushing toward $2,500. Full ranges on the cost page.

Where we work in Fawn Township

Payne's Folly and part of the Muddy Creek Forks Historic District are in the township.

Installers must hold a PA DEP radon mitigation certification (how to check), and permit questions go to the township office at fawntwp.org.

Common questions

Is radon a problem in Fawn Township?

Yes. PA DEP has 621 tests on record from the ZIP codes covering Fawn Township, and 65.2% of them came back at or above the EPA's 4.0 pCi/L action level. 21.2% were at 20 pCi/L or more. The county-wide rate is 52.5%.

What is the average radon level in ZIP 17321?

The median of 460 PA DEP tests in ZIP 17321 is 6.8 pCi/L and the mean is 14.4 pCi/L. A mean that far above the median means a long tail of very high readings, topping out at 196 pCi/L.

Nearby

Fawn Grove 64.8%, Lower Chanceford Township 60.5%, East Hopewell Township 64.6%, Peach Bottom Township 57.4%, Chanceford Township 62%. Share of PA DEP tests at or above 4.0 pCi/L, against 65.2% here.