Table 1: Toxins concentrations reported from various freshwater bodies in South Korea.

Dominant cyanobacteria genusToxins (μg/g or μg/L)Reservoir (river)Sampling dateReference

Microcystis 133 (μg/g, MC)Soyang (Han River)26 Oct. 1992 [13]
Oscillatoria 76Daechung (Geum River)06 Oct. 1992
Anabaena 115Jangsong (Yeongsan River)15 Oct. 1994
(algal samples)635Noksan (Nakdong River)27 Aug. 1995

Microcystis
(algal samples)
288–2612 (μg/g, MC)10 large reservoirsAug. 1996–Oct. 1997[14]

Microcystis 1.89 μg/L except at
Site 1 (19.1 μg/L)
Noksan Station
(Nakdong River)
20 Aug. 1998[15]

Microcystis 0.057–0.488 (μg/L, MC)Paldang
(Han River)
03 Sep.–28 Nov. 1997[8]

Microcystis 0.2 (μg/L, MC)Daechung
(Geum River)
27 Apr.–12 Oct. 1999[16]

Anabaena
Oscillatoria
0.01–0.08 (μg/L, AT)Daechung
(Geum River)
18 Jun.–5 Nov. 2001[17]

Microcystis 0.59 (μg/L, MC)
0.55 (μg/L, MC)
Yangsoori
Seokchon
(Han River)
2-3 Oct. 2004[18]

MC: microcystin, AT: anatoxin-a.