Red Tide – Harmful Algal Blooms (HABs) and Desalination: A Guide to Impacts, Monitoring and Management -UNESCO ⊠Arid countries throughout the world are heavily reliant on seawater desalination for drinking and industrial process water. With nearly 20,000 plants operating globally and capacity projected to rise 12% per year, the industry is large and growing. A major operational challenge facing the industry is also expanding globally â the phenomena termed harmful algal blooms or HABs. Algal âbloomsâ are cell proliferations caused by the growth and accumulation of individual species; they occur in virtually all bodies of water. Cells can reach concentrations sufficient to make the seawater appear red (hence the common term âred tideâ), though [âŠ] Red Tide – Harmful Algal Blooms (HABs) and Desalination: A Guide to Impacts, Monitoring and Management -UNESCODME GmbH2017-11-01T13:45:30+01:00