Centralised treatments using physical disinfection methods are found on the household use level too, but are technologies that can be applied on a larger scale. When moving any technology up to a larger scale, community maintenance and responsibilities as well as ease of access to supplies becomes greater; while costs reduce. However if these aspects cannot be fulfilled, communities may break up water access towards the household level use, so as to divide responsibilities and allow private use to maintain the smaller systems. However, shared knowledge and resources then become more important (community cooperation).
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! CT |style="background:#efefef;"|[[Image:evap desal icon.png|center|link=http://akvo.org/wiki/index.php/Desalination_/_Evaporation]]|style="background:#efefef;"|[[Image:Icon_boiling1.png|center|link=http://akvo.org/wiki/index.php/Boiling]]|style="background:#efefef;"|[[Image:coag flocc icon.png|center|link=http://akvo.org/wiki/index.php/Natural_coagulation_/_Flocculation]]|style="background:#efefef;"|[[Image:presettle icon.png|center|link=http://akvo.org/wiki/index.php/Storage_/_Pre- Physicalsettlement]]|style="background:#efefef;"|[[Image:aeration icon.png|center|link=http://akvo.org/wiki/index.php/Aeration]]
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[[Image:water pyrammid small.jpg|center|130px|link=http://akvo.org/wiki/index.php/Desalination_/_Evaporation]]|[[Image:village boiling small.jpg|center|130px|link=http://akvo.org/wiki/index.php/Boiling]]|[[Image:250px-Moringa_seed_pods small.jpg|center|130px|link=http://akvo.org/wiki/index.php/Natural_coagulation_/_Flocculation]]|[[Image:300px-Storage_and_sedimentation small.jpg|center|130px|link=http://akvo.org/wiki/index.php/Storage_/_Pre-settlement]]|[[Image:300px-Aeration_cone small.jpg|center|130px|linkstyle=
http"background:
//akvo.org/wiki/index.php/Aeration]]|-#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">
[[Desalination / Evaporation|Desalination /<br>Evaporation]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Boiling]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Natural_coagulation_/_Flocculation|Natural coagulation <br>/ Flocculation]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Storage / Pre-settlement]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Aeration]]</div>
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