Table 3.

Calculated discharge on microplastics (MP) based on COD to the five Danish Lakes and the relationship between COD and MP given in Simon et al. (2018)

Lake	Calculated MP load (kg/km2/year) based on COD load to the catchment and Simon et al. (2018)	Calculated MP load (kg /km2/year) based on COD load directly to the lake and Simon et al. (2018)	MP values deposited per sampling area of sediment per year (µg/year)	Max values let directly into the water (µg/m3/day)	Max values in water (corrected for retention time (µg/m3)	Estimated ingested particles per day per mussel (if no sedimentation happened, and if all particles were available for 1 single mussel)
Arresø	2.98–6.98	0.20–0.46	0.04	0.41	460.69	0.02–0.48
Bryrup Langsø	6.45–15.10	0.16–36.9	0.08	6.74	492.24	0.02–0.51
Hinge sø	0.85–1.00	1.57–3.68	0.01	25.74	469.82	0.02–0.49
Ravn sø	10.94–25.62	1.85–4.32	0.15	0.08	70.82	0.003–0.07
Silkeborg Langsø	248.07–580.79	75.27–176.23	3.42	78.90	935.92	0.04–0.97