Specific Location	Map locations	Country	MP size range	MP concentration (particles kg⁻¹ d.w.b and w.wc)	References
(7 WWTPs,)	35	Ireland	250 µm - 4 mm	4196 - 15,385^a	Mahon et al., 2017 [113]
(7 WWTPs,)	35	Ireland	250 µm - 4 mm	4196 - 15,385^a	Mahon et al., 2017 [113]
(7 WWTPs,)	11	Netherlands	0.7 µm - 5 mm	370 - 950^b	Leslie et al., [33]
Lysekil	2	Sweden	300 µm - 5 mm	16.7^a × 10⁴	Magnusson and Norén, 2014 [112]
Ithaca, New York	36	USA	No Data	About 1000 - 4000^a	Zubris and Ricahrd, 2017 [19]
Los Angeles County	14	USA	<5 mm	5000	Carr et al., 2016 [111]
(28 WWTPs,)	37	China	37 µm - 5 mm	1565 - 56,386^b	Li et al., 2018 [176]
Oldenburg	9	Germany	<5 mm	1000 to 24,000^b	Mintening et al., 2014, 2017 [116] [117]
Seelze	38	Germany	20 to 100 µm	495,000^b	Sujathan et al., 2017 [170]
Glasgow	5	UK	1.34 - 1.62 mm	About 2000^c	Murphy et al., 2016 [117]
Mikkeli	1	Finland	<1 mm	8.2-301.4^c	Lares et al., 2018 [143]
Vancouver	24	Canada	64 µm	4400^c	Gies et al., 2018 [149]
(10 WWTPs)	39	Norway	54 µm to 5 mm	6 077^b	Lusher et al., 2018 [169]
Jiangsu	40	China	25 to >500 μm	1.6 and 0.7^c	Lv et al., 2019 [156]
Wuhan	41	China	100 to 800 μm	24,030^b	Liu et al., 2019 [157]
Beijing	26	China	681.46 μm	95.16^a	Yang et al., 2019 [151]
Italy	42	Italy	0.5 - 0.1 mm	113,000^b	Magni et al., 2019 [160]