亲爱的苏珊感谢这个有趣的文章。你说，公司不应该向非政府组织提供或销售家庭技术，许多人都会同意，但非政府组织达到最低亿的作用是什么？直到每个人都安全管理供水，HWTS（家庭水处理和安全存储）仍然是一个非常逻辑的安全水解决方案，你会同意吗？正如你所说，非政府组织不应该扭曲市场，但他们的角色可以帮助各国社会营销和创造一系列有吸引力的治疗解决方案的供应链，以便人们可以选择。对于真正的可怜补贴仍然需要。关于HWT的效率，就像你说的那样。如果一个选项未使用100％的效果非常低。关于说服一个家庭投资HWTS健康确实不是一个论点，而是对等压力和地位是。例如，印度的贫困家庭将过滤器放在房子前面，以展示他们有过滤器。关于问题。 " Is household water treatment a failed strategy ?" I guess there are several answers possible. Besides failures there is also stories like the water filters in Vietnam. The commercial sales there scales up by 200% per year (Roshini , WHO 2016) and also poor families buy filters of 15 to 25 US$. This success is probably due to the fact that people are used to boil water and that there now is a supply chain of affordable and attractive water filters. Interesting studies on how to sell products to the BOP are on the website www.hystra.org A good article on how to scale up safe water can be found at http://www.300in6.org/wp-content/uploads/2014/06/Going-to-scale-with-safe-water_Urs-Heierli_Paul-Osborn.pdf This article mentions the 5 Ps for marketing and in this case focussed on safe water systems 1 Product, (attractive, effective, to be trusted) 2 Price, ( affordable) 3 Place, ( supply chains, profit for each link in the chain) 4 Promotion ( Social marketing task of NGOs government, Commercial task of Companies) 5 People ( drinking safe water, use a treatment option should become social norm) Susan, thanks again for bringing up this important issue and hope that your next article is about solutions for safe water Regards Henk Holtslag smartcentregroup.org