Population allocation at the housing unit level: estimates around underground natural gas storage wells in PA, OH, NY, WV, MI, and CA

Table 1 Visual verification of well locations

State	Active UGS facilities // wells	Wells visually verified^a	Visually unidentified wells^a	Median (SD) visual offset distance (ft.)
CA	12 // 346	17	5	10.9 (7.4)
MI	39 // 2394	119	4	10.9 (8.2)
NY	26 // 972	48	4	52.3 (174.8)
OH	21 // 3318	166	26	55.5 (117.3)
PA	46 // 1332	67	11	62.7 (126.5)
WV	25 // 1472	73	30	82.8 (131.3)

^aVerified and unidentified wells combined equal 5% random sample of active UGS wells per state

ISSN: 1476-069X