Table 1.

PFAS concentrations in soil metadata collected from soil survey studies.

Date	First author	Total PFAS Conca	Number of PFAS	Max PFOA Conc	Max PFOS Conc	Location
		ug/kg		ug/kg	ug/kg
2010/2013	Naile	0.3 - 3.9	12	3.4	1.7	Korea
2010	Li	141 - 237	15	47.5	10.4	China
2010/2019	Wang/Gao	0.7 - 22	9	2	20	China
2011	Pan	<0.3 - 9.4	9	0.5	2.4	China
2011	Wang	0.1 - 8.5	12	2.8	0.9	China
2011	Wang	<0.1 - 1.7	12	0.5	0.7	China
2012	Wang	1.3 - 11	12	0.9	9.4	China
2012	Strynar	<0.5 - 150	13	32	10	Multiple
2012	Llorca	<0.1 - 5.8	18	1.5	5.4	Tierra Del Fuego & Antarctica
2013	Wang	<0.1 - 1.8	22	0.3	0.4	China
2013	Meng	<0.1 - 4.1	16	0.2	0.2	China
2014	Kim	<0.05 - 1.6	2	0.7	0.9	Korea
2014	Tan	<0.1 - 1.8	16	0.3	0.1	Nepal
2015	Xiao	6 - 135	2	28	126	United States
2014/2015	Shan/Jin	0.7 - 28.8	11	9	0.3	China
2015	Meng	0.04 - 3.6	13	2.3	1.9	China
2016	Chen	0.3 - 5	17	25	2	China
2016	Rankin	0.05 - 15	32	3.4	3.1	Multiple
2016	NH DES	<0.5 - 71	12	33	59	United States
2016	Zhang	0.1 - 4	21	4.2	2.7	China
2017	Choi	<0.05 - 3.6	2	1.8	2.7	Korea
2017	Liu	1.9 -126	12	123.6	2.7	China
2018	Meng	3 - 64	12	5	4.2	China
2018	Scher	1.3 - 30	7	3	12	United States
2018	Kikuchi	<0.02 - 20	28	0.6	1.7	Sweden
2018	HWG	<0.2 - 5.1	6	0.5	3.1	United States
2018	NEA	0.4 - 174	17	3.3	162	Norway
2018	Dalahmeh	1.7 - 7.9	26	0.9	3	Uganda
2018	Wang	<0.001 - 0.01	2	0.01	0.003	China
2019	Zhu	0.5 - 35	17	4.9	9.7	United States
2019	Cao	0.6 - 5.1	17	2.7	0.1	China
2019	Groffen	0.8 - 53	15	3.7	37	Belgium
2019	Kim	0.1 - 13.9	17	2.1	0.7	Korea
2019	Li	NR - 64.7	21	16.6	2.8	China
2019	Seo	2.5 - 8.8	19	0.3	1	Korea
2019	Skaar	<0.05 - 7.1	14	0.01	7.1	Norway
2019	Zhang	4.2 - 49	12	23	1.2	China
Overall		<0.001 - 237
maximum				123.6	162
minimum				0.01	0.003
median				2.7	2.7

Note: < means below quantitative detection limit

^aReported by the original study authors