- General Guidance on Water Quality: Sanitation
https://www.who.int/water_sanitation_health/dwq/gdwq0506.pdf - General Guidance on Water Quality: Bitstream
https://apps.who.int/iris/bitstream/handle/10665/44584/9789241548151_eng.pdf;jsessionid=6EFCA212709A4AC5D7756CDAE6096AC9?sequence=1 - Pharmaceuticals
https://apps.who.int/iris/bitstream/handle/10665/44630/9789241502085_eng.pdf?sequence=1 - Cyanobacteria and Cyanotoxins