Type of WWTP’s

Country

MP size range

MP concentration (particles kg−1 d.w.a and w.wb)

Analytical Method

References

(7WWTPs,)

Ireland

(7WWTPs)

250 µm - 4 mm

4196 - 15,385

Optical and FT-IR

Mahon et al., 2017 [161]

(7WWTPs,)

Netherlands

(Amsterdam)

0.7 µm - 5 mm

370 - 950

FT-IR

Leslie et al., [104]

n.a

Sweden

(Lysekil)

300 µm - 5 mm

16.7a × 104

FT-IR

Magnusson & Norén, 2014 [96]

n.a

(USA)

Ithaca, New York

No Data

About 1000 - 4000

Filtration techniques

Zubris and Richards, 2017 [165]

Primary, Secondary and Tertiary

USA

(Los Angeles County)

<5 mm

5000

Visual sorting,

Microscope FT-IR

Carr et al., 2016 [99]

China

(28WWTPs,)

37 µm - 5 mm

1565 - 56,386a

Li et al., 2018 [166]

12 WWTPs: mostly secondary and tertiary

Germany

(Oldenburg

<5 mm

1000 to 24,000a

micro-FT-IR

Mintening et al., 2014, 2017 [94] [101]

Germany

(Seelze)

20 to 100 µm

495,000a

confocal Raman microscopy

Sujathan et al., 2017 [164]

Secondary

UK

(Glasgow)

1.34 - 1.62 mm

About 2000b

FT-IR

Murphy et al., 2016 [90]

Primary and secondary

Finland

(Mikkeli)

<1mm

8.2 - 301.4b

FT-IR and Raman Microscope

Lares et al., 2018 [95]

Primary and secondary

Canada

(Vancouver)

64 µm

4400b

Microscopy and FT-IR

Gies et al., 2018 [119]

Norway

(10 WWTPs)

54 µm to 5mm

6 077a

µ-FT-IR

Lusher et al., 2018 [163]

n.a

China

(Jiangsu)

25 to >500 μm

1.6 and 0.7b

FT-IR

Lv et al., 2019

[125]

Primary and secondary

China

(Wuhan)

100 to 800 μm

24,030a

Visual inspection and FT-IR

Liu et al., 2019

[126]