 So, we're trying to look at the quality of drinking water in New Zealand and obviously drinking water quality is something that's really important for people. We've had some recent outbreaks such as Havelock North where several thousand people got sick from microbes in the water and we're looking at microbes across New Zealand from where people are taking drinking water. There have been some sites that have had high levels and those are now not going to be used for drinking water. There are other sites such as many of the surface areas where we actually find high levels of Campylobacter, E. coli, Cryptosporidium and Giardia, so all waterborne, potential waterborne pathogens. One of the things that's come out of our work is that actually some of the treatments don't have to be as high which doesn't put so much cost on the provider but it does need to happen and our work is only every quarter so we can't say for sure if there won't be significant events that happen between those like the big outbreak like Havelock North and that's why other places like the district councils need to continue to measure water quality. So, you can always make drinking water safe if you do treat. So, if you treat it with chlorine, if you filter it, so some of our pathogens, Cryptosporidium and Giardia, actually aren't killed but the cysts aren't killed by chlorine but you can filter them out. So, the problem is that they increase the cost to the companies and therefore the cost to the consumer. So, you can always make water safe for drinking but the question is where do you want it safe and do you want it to be safe for swimming and all the other things that are important for us as people and also wildlife for example.