As you can tell from the seriousness of the illnesses listed above, if you are experiencing symptoms of Camp Lejeune water contamination, seeking immediate medical assistance will be the best course of action.
Having said that, not all types of water contamination are so dangerous. In fact, given the stringent EPA regulations pertaining to the quality of drinking water, it's impossible to come across this degree of contamination at this time.
However, instances of biological contamination that are caused by bacteria and parasites are not unheard of. As you may have guessed, these will usually cause minor skin issues and gastric problems.
Typically, the symptoms will include watery diarrhea, vomiting, nausea, stomach cramps, skin rash, hives, and skin itching. As long as the symptoms are not too severe, simple home remedies like drinking plenty of fluids and getting some rest should be enough to get you back in the pink of health.
For rash, aloe vera gel or an OTC corticosteroid ointment should do. Similarly, for stomach cramps and bloating Pepto-Bismol will work like a charm. However, if the symptoms persist for more than 24 hours, it is best to seek medical help.