Which lakes in Taiwan are the clearest?

21 named lakes in Taiwan have an official Secchi depth. This page ranks the 20 deepest readings. Secchi is a clarity measurement, not a swim-safety class and not a LakeQuality A–F grade.

Is clear water the same as clean water?

No. Secchi measures how far a disk stays visible. A clear lake can still have bacteria, toxins, or contaminants this catalog does not grade. Open a lake page for the authority's values.

Clearest lakes in Taiwan

Clearest lakes in Taiwan: 21 named lakes have an official Secchi depth. The 20 below are ranked by that reading — water clarity, not a LakeQuality A–F grade.

Lake map

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Highest Secchi readings in Taiwan

Lake	Place	Total phosphorus	Chlorophyll-a	Secchi	Year
Jih-Yueh-Tan Reservoir	Nantou	11 µg/L	2.8 µg/L	4.0 m	2020
Lan-Tan Reservoir	Chiayi City	16 µg/L	6.1 µg/L	2.2 m	2020
Mu-Tan Reservoir	Pingtung	14 µg/L	6.3 µg/L	2.2 m	2020
Hsin-Shan Reservoir	Keelung	17 µg/L	5.7 µg/L	2.0 m	2020
Wu-Shan-Tou Reservoir	Tainan	14 µg/L	2.7 µg/L	2.0 m	2020
Wu-She Reservoir	Nantou	17 µg/L	4.4 µg/L	2.0 m	2020
Li-Yu-Tan Reservoir	Miaoli	13 µg/L	7.5 µg/L	1.8 m	2020
Shih-Men Reservoir	Taoyuan	17 µg/L	3.0 µg/L	1.8 m	2020
Te-Chi Reservoir	Taichung	12 µg/L	5.3 µg/L	1.8 m	2020
Yung-Ho-Shan Reservoir	Miaoli	18 µg/L	5.1 µg/L	1.8 m	2020
Cheng-Ching-Hu Reservoir	Kaohsiung	22 µg/L	5.9 µg/L	1.6 m	2020
Pao-Shan Reservoir	Hsinchu	26 µg/L	5.0 µg/L	1.6 m	2020
Tseng-Wen Reservoir	Chiayi	13 µg/L	3.6 µg/L	1.6 m	2020
湖山水庫	Yunlin	17 µg/L	3.6 µg/L	1.6 m	2020
Jen-Yi-Tan Reservoir	Chiayi	20 µg/L	4.1 µg/L	1.4 m	2020
A-Kung-Tien Reservoir	Kaohsiung	16 µg/L	7.8 µg/L	1.2 m	2020
Ming-Te Reservoir	Miaoli	30 µg/L	48 µg/L	1.0 m	2020
Nan-Hua Reservoir	Tainan	15 µg/L	3.6 µg/L	1.0 m	2020
Pai-Ho Reservoir	Tainan	29 µg/L	7.0 µg/L	1.0 m	2020
Feng-Shan Reservoir	Kaohsiung	883 µg/L	75 µg/L	0.7 m	2020

Showing 20 of 21 named lakes. Open a county or place page for the rest.

Frequently asked questions

Which lakes in Taiwan are the clearest?: 21 named lakes in Taiwan have an official Secchi depth. This page ranks the 20 deepest readings. Secchi is a clarity measurement, not a swim-safety class and not a LakeQuality A–F grade.
Is clear water the same as clean water?: No. Secchi measures how far a disk stays visible. A clear lake can still have bacteria, toxins, or contaminants this catalog does not grade. Open a lake page for the authority's values.