The chemicals that get added to water these days can make this much worse, such as chlorine. You could consider getting a water filter for your whole-house (the only kind that really gets out ammonia too). In my area (NC), the company we call is called Kinetico. They test your water and advise you what is in there. The water system for my house would be about $1200. I have skin issues, but not as rough as aquagenic urticaria. I just have psoriasis and Celiac skin issues.
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