Radon in Snyder County, PA: Selinsgrove Results and Costs

Half of Snyder County's basement radon tests read high. In the 10 ZIP codes centered in the county with at least 30 basement tests, PA DEP data shows 2,636 of 5,187 basement tests (50.8%) at or above 4 pCi/L, by our count through July 2026.

Across all floors, DEP's set lists 5,853 Snyder County tests with 44.5% at or above the action level. EPA's 1993 map rates the county Zone 1, as it does all 12 Snyder County ZIP areas in the Census Bureau file.

Rural Snyder County homes use the same systems as anywhere else; HomeGuide's Feb 2026 survey puts a standard sub-slab system at $1,200 to $2,000, and a home on a private well should also ask about radon in water.

Licensing and permits

Pennsylvania DEP certification is required for paid radon testing and mitigation here, as statewide (25 Pa. Code Chapter 240). Check the certification number before you sign.

Permits: Snyder County townships administer construction code permits locally or through an agency; an electrical permit may apply to the fan circuit. HomeGuide puts radon permits at $25 to $150 where required.

Well water: radon in private well water is a separate test from air. Carbon filters cost $1,200 to $1,800 and aeration systems $4,000 to $5,000 in HomeGuide's guide.

Ask for the DEP-reported post-mitigation result.

Local conditions

Snyder County lies in the Ridge and Valley province. Long sandstone ridges such as Shade Mountain and Jacks Mountain run southwest to northeast, with shale and limestone valleys between them around Middleburg, Beavertown and Kreamer, and the Susquehanna River forms the eastern edge at Selinsgrove and Shamokin Dam.

DEP basement data by ZIP: Selinsgrove's 17870 was 47.5% at or above 4 pCi/L across 2,779 tests; Middleburg's 17842 55.4% across 722; Shamokin Dam's 17876 49.6% across 341; Beavertown's 17813 45.9% across 159 (PA DEP data, our count).

Smaller ZIPs run higher still: Mount Pleasant Mills' 17853 reached 72.0% across 161 tests and Port Trevorton's 17864 61.5% across 122 (PA DEP data). Small counts swing more, so treat them as a signal to test.

Plain-sect farms in the western valleys and newer homes along the US 11 and 15 corridor near Selinsgrove make for very different jobs. A bank barn conversion or a stone farmhouse with a dirt-floored root cellar needs a membrane and careful sealing, while a ranch on a poured basement is a one-day install.

What drives local prices

Travel: certified mitigators may come from Sunbury, Lewisburg or State College; ask whether the bid includes a trip charge (not a published figure).
Farmhouse foundations in the county's valleys mix stone basements and crawlspaces, which can push a job from the $1,200 to $2,000 sub-slab range toward block-wall pricing of $1,800 to $3,000, based on HomeGuide's published survey.
Private wells: water radon treatment is separate, $1,200 to $1,800 for carbon (HomeGuide).
Permit $25 to $150 and professional retest $125 to $400 (HomeGuide).
Extra suction points for tight or wet fill: est. $250 to $500 each in our calculator.

Common jobs

Sub-slab systems in Selinsgrove and Shamokin Dam homes along US 11 and US 15.
Farmhouse systems combining basement suction with crawlspace membranes.
Air and well-water radon testing together for rural sales.
Systems for homes near Susquehanna University rented to students.

From test to fixed, and where we cover

Step 1: test the air, and test the well if you have one. Step 2: at 4 pCi/L or more in air, get two DEP-certified bids.

Step 3: compare them with the calculator. Step 4: retest after the system runs at least 24 hours.

We cover Selinsgrove, Shamokin Dam, Middleburg, Beavertown, Kreamer, McClure, Port Trevorton and Mount Pleasant Mills, along US 11, US 15 and US 522.

Communities: Selinsgrove, Shamokin Dam, Middleburg, Beavertown, Kreamer, McClure, Port Trevorton, Mount Pleasant Mills

Before you sign

There is time to find a certified firm even if few are local; EPA treats radon as a long-term exposure (EPA Citizen's Guide). Get the bid in writing, with the fan warranty and the post-mitigation test included.

Questions about Snyder County

Is radon common in Snyder County?

Yes. 50.8% of basement tests in the county's ZIPs with at least 30 tests read 4 pCi/L or higher in PA DEP data.

Is Selinsgrove high in radon?

Selinsgrove's ZIP 17870 had 47.5% of 2,779 basement tests at or above 4 pCi/L in DEP data.

Should I test my well for radon too?

If you are on a private well, yes; water treatment ranges from $1,200 to $1,800 for carbon to $4,000 to $5,000 for aeration (HomeGuide).

Does a Snyder County mitigator need DEP certification?

Yes, under 25 Pa. Code Chapter 240.

Sources

Nearby counties

Rules and fees change; confirm with the state radon office. Price your own system with the radon mitigation cost calculator, read the radon mitigation cost guide, or check any ZIP with the radon levels by ZIP tool.