Belknap County, NH

The federal environmental record for Belknap County (population 65,027): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.

Superfund NPL sites

federal cleanup sites

PFAS-detecting water systems

TRI facilities

open tank releases

Drinking water: PFAS testing

No public water system serving Belknap reported a PFAS detection in the UCMR5 national testing round. Systems serving under 3,300 people were only sampled in part, so absence from this table is not proof of absence in the water.

Facilities reporting toxic releases (2024)

3 facilities in Belknap filed TRI reports for 2024, totalling 1k lb released.

Facility	City	Top chemicals	Total released
SPX AIDS TO NAVIGATION	TILTON	Diisocyanates	1k lb
NEW HAMPSHIRE BALL BEARINGS INC	LACONIA	Chromium compounds (except for chromite ore mined in the Transvaal Region), Copper And Copper Compounds	26 lb
BOYD LACONIA LLC	LACONIA	Copper	14 lb

Underground fuel tanks

EPA's UST Finder records 300 tank facilities in Belknap: 136 tanks in service and 783 closed. 157 fuel releases are on record, of which 46 remain open. Open releases are cleanups that have not reached "no further action".

Radon

EPA maps Belknap as Zone 2, moderate predicted indoor radon (2 to 4 pCi/L average). Radon and air quality are covered in depth on lung.com.

The record for one specific address

County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.

Get the report - $39

All federal cleanup sites on file

The wider Superfund enterprise inventory (SEMS) for Belknap, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.

FRANK BEAN ROADLACONIA
GILFORD FIRE TRAININGGILFORD
OLD PILLSBURY MILLTILTON
ORE HILL MINE SITEWARREN
PLYMOUTH STREET AREA SITECENTER HARBOR