Table 4.

Concentrations and sum (ng L⁻¹) of 21 PFCs detected in river water samples in central Italy

	PFBA	PFPeA	PFBS	PFHxA	PFPeS	PFHpA	PFHxS	PFOA	PFHpS	PFNA	PFOS
CAI
March	2.2	2.5	0.5	2.2	0.1	0.8	0.4	2.0	0.04	0.4	0.8
April	4.7	1.9	0.7	2.1	0.1	1.0	0.3	4.0	0.02	0.4	0.6
May	5.5	3.4	0.9	2.7	< LOD	1.2	0.04	1.8	0.6	< LOD	0.3
June	11.6	12.3	3.9	10.2	0.2	3.5	1.7	7.9	0.1	1.3	2.0
GEN
March	3.0	4.4	0.7	3.9	0.1	1.4	0.8	2.7	0.04	0.4	1.0
April	6.1	7.5	1.5	6.5	0.2	3.1	0.7	7.1	0.1	0.9	1.8
May	11.0	6.5	1.5	5.6	0.02	2.1	0.8	4.0	0.6	0.1	1.1
June	14.5	12.3	2.6	12.4	nd	4.1	2.2	10	nd	nd	1.5
NES
March	2.0	1.7	0.4	1.7	0.1	0.6	0.3	1.6	0.03	0.3	0.6
April	4.5	1.2	0.7	1.7	0.03	1.0	0.2	3.8	0.02	0.4	0.7
May	14.7	7.9	1.4	5.2	< LOD	2.3	0.6	4.9	0.8	0.4	1.3
June	19.2	10.5	2.3	12.4	0.2	6.5	1.1	11	0.1	2.2	1.8
SAO
March	2.3	0.8	0.9	1.1	0.02	0.3	0.1	1.3	0.01	0.2	0.2
April	1.8	0.9	0.8	1.1	< LOD	0.4	0.1	3.5	0.01	0.2	0.2
May	3.6	1.7	1.7	1.1	< LOD	0.5	< LOD	0.4	0.6	< LOD	< LOD
June	9.7	4.6	4.5	4.8	0.1	1.4	0.3	5.0	0.05	0.7	0.8
TOP
March	1.3	0.4	0.2	0.6	nd	0.2	0.1	0.8	0.01	0.1	0.1
April	2.2	< LOD	0.3	1.1	< LOD	0.4	0.1	3.3	0.1	0.3	0.5
May	10.3	4.2	0.3	1.6	< LOD	0.5	< LOD	1.8	0.6	< LOD	0.1
June	8.6	2.3	0.8	2.1	nd	0.6	0.1	3.1	0.04	0.3	0.5
TVN
March	4.3	1.5	0.6	2.4	0.1	0.5	0.2	2.3	0.03	0.4	0.5
April	4.0	2.0	0.8	2.5	0.1	0.6	0.1	5.4	0.02	0.4	0.4
May	6.3	3.3	0.7	2.4	< LOD	0.8	< LOD	1.1	0.6	0.0	< LOD
June	6.9	5.1	1.3	3.6	0.05	0.8	0.2	3.1	0.03	0.4	0.7

	PFNS	PFDA	PFDS	PFUdA	PFDoA	PFDoS	PFTrDA	PFTeA	PFHxDA	PFODA	∑21PFCs
CAI
March	0.1	0.4	< LOD	0.2	0.1	< LOD	0.1	0.1	< LOD	< LOD	12.9
April	0.05	0.3	< LOD	0.2	0.1	< LOD	0.2	0.1	< LOD	< LOD	16.6
May	0.3	0.4	< LOD	< LOD	< LOD	< LOD	< LOD	0.2	< LOD	< LOD	17.2
June	nd	1.2	nd	0.1	0.1	nd	0.1	< LOD	< LOD	< LOD	56.2
GEN
March	< LOD	0.5	nd	0.1	0.1	< LOD	0.1	0.1	< LOD	< LOD	19.4
April	< LOD	0.7	< LOD	0.2	0.1	< LOD	0.1	0.1	< LOD	< LOD	36.6
May	0.3	0.6	< LOD	< LOD	< LOD	< LOD	< LOD	0.2	< LOD	< LOD	34.6
June	nd	nd	nd	nd	3.3	nd	nd	nd	nd	nd	63.0
NES
March	< LOD	0.3	0.3	0.1	0.1	0.05	0.1	< LOD	< LOD	< LOD	10.0
April	< LOD	0.4	< LOD	0.1	0.1	< LOD	0.1	0.1	< LOD	0.2	15.3
May	< LOD	0.9	< LOD	< LOD	< LOD	< LOD	< LOD	0.3	< LOD	< LOD	40.6
June	nd	1.1	nd	0.1	0.1	nd	0.1	< LOD	< LOD	nd	68.5
SAO
March	0.1	0.1	0.0	0.1	0.1	< LOD	0.1	0.1	< LOD	< LOD	7.8
April	< LOD	0.1	< LOD	0.1	< LOD	0.1	0.1	0.1	< LOD	0.2	9.7
May	0.3	0.0	< LOD	< LOD	< LOD	< LOD	< LOD	0.3	< LOD	< LOD	10.0
June	nd	0.7	nd	0.1	0.1	nd	0.1	0.1	< LOD	< LOD	33.0
TOP
March	0.04	0.1	0.1	0.1	0.1	< LOD	0.1	0.1	< LOD	< LOD	4.3
April	0.1	0.2	0.1	0.3	0.2	0.1	0.2	0.2	0.3	0.2	10.3
May	0.3	0.2	< LOD	0.1	< LOD	< LOD	0.1	0.3	< LOD	< LOD	20.4
June	nd	0.4	nd	0.1	0.1	nd	< LOD	0.1	< LOD	nd	19.0
TVN
March	0.1	0.3	0.1	0.2	0.1	0.05	0.1	0.1	< LOD	< LOD	13.7
April	0.1	0.2	< LOD	0.1	0.1	< LOD	0.1	0.1	0.2	< LOD	17.2
May	0.3	0.2	< LOD	< LOD	< LOD	< LOD	< LOD	0.3	< LOD	< LOD	15.9
June	nd	0.4	nd	< LOD	0.1	nd	0.1	< LOD	< LOD	nd	22.7