Kickstarter with 29 days left (as of 4/17/13) and 4.5k$ USD to go for a cheap cell phone water testing kit.

[Dan McGuire]

I've emailed the project lead and I'll edit this post if he replies, but here's the link.   So far this device can detect as low as 25ppm nitrate, but I'm wondering if this has capabilities to test for nitrites and or ammonia.  Anyways I emailed the project lead and told him I would personally be willing to spend ~100$USD if this thing could detect nitrate/nitrite/ammonia levels.

http://www.indiegogo.com/projects/mobosens-a-water-pollution-sensor-for-your-smartphone



EDIT:  He replied and stated that it currently can not detect nitrite or ammonia, but they are certainly on the list along with a slew of heavy metals they are trying to detect with this device.