steve ritchie and tamar hurwitz on the environment. >> again, steve ritchie assistant general manager for water. i'm going to give a brief overview of the water conservation program in puc. something 245 we are very proud of. we are still in the drought and will be for the foreseeable future and reduction and demand and the mayor directed city departments. he didn't use the word "voluntary" he said reduced. we are pushing for more water conservation. in san francisco it's 49 gallons per day per resident. it's very low for the city. it's something we should be very proud of. that's down since the last draft. here is a history on the on going conservation assistance. this shows the number of rebates that we have given over time in various different programs for commercial washers, high efficiency units and toilets and single family washer rebates. so you can see from 2007 on we've been steadily increasing slowdown a little bit in 2010-2011. the number of rebates in the thousands. this is something that works for us. what we find is that fix you are changes -- fix you if if if i can you

steve ritchie assistant general manager for water. this is the regular supply outlook for our system. i have got the slides up there that i hope we have copies there in front of you as well. basically our total reservoir is about 95,000 acre feet. we'll talk about that later that water bank is working for us. ours is a storage base system in fact i ran the numbers for my own interest that that amount of storage for drinking water at the demand of 209 that we are looking for is two 2 years of two 2 -- water. that is the way the system is designed to be operated. in fact in the way we look at being abe to complete the lower cherry to operate is a whole other year worth of supply. we have two 2 years of supply. we would never operate that way. we have to make the supply last as long as it needs to. but it a good reference point to understand how much water we have. >> if i might just add to that, less we have become complacent. there is a reason for that, by nature of water rights, there are years where you can get absolutely zero entitl

this is steve ritchie, assistant general manager from water. if we can have the slides, please. basically right now our total storage is 64.5% of maximum with $494,000 is available as water si ply and as i have emphasized in past presentations and that's because of our water bank and preserving that and i'll talk about that. we need to achieve a demand production of 210%. this defers a production by 20% by one year in the future. if we didn't make a reduction this year, we would have to go to 20% this year, but keeping that up, that needs to go to 20%. that's important because 20% is a harsh cut. the demand response has been variable, but in the last four weeks, we've seen marketing improvements by our customers as a whole. our reservoir storage level as of june 22, they're at 94 percent and it's full, which is really good news for us. but at a price, water bank is down to about 35% of capacity. and i'll show the significance of that in the next slide. this is a graph showing historically how much water has been in water bank. it has ranged as high as 750,000 acre feet and we ha

. >> that is steve ritchie. water tsar of the public utilities commission explaining how san francisco has dodged a bullet so far in avoiding the water rationing in the last month have residents begun to take this drought seriously. >> could you do more if you had to? >> probably i can use a sort of guideline. what is 10% per person? >> taking shorter showers and turn off water when i brush teeth small things. >> try something >> trying. yes. >> but still needs to be a mass effort. it did not take the more dramatic measure based on a trend. we reserve the rice. and in other words save water from hetch hetchy now, or suffer more, later. >> new ad campaign take a listen to part of >> all right. this ad will be joined by print and bill board versions throughout san francisco public utilities commission district in the hopes everyone who jumps into the shower will make it a quickie. >> we're trying everything. an app let's drivers sell public parking spaces to other drivers looking for a spot. the city attorney says

. >> steve ritchie, there is no connection with this water and the west side ak if de -- aquifer. >> just to follow up where is the aquifer for this ground water? what is it connected to? >> this area wouldn't be called an ak if you are -- aquifer. there is ground water in parts of the city that doesn't produce a high enough quality. the west side basin, that's a separate ground water unit. >> the use of that ground water is prohibited for any use, irrigation? >> absolutely. the concern again of the dtsc is strictly about that ground water as a potential source of contamination through the soil, through off gassing or through intrusion into the ak if -- ak if quifer underneath and that area is obtained by several orders of magnitude which i described and the website, you can look at any of the documents that would be of interest to you to demonstrate that. so the ground water is a pretty contaminated level for any uses. what about the soil? it sounds like there is still an on going concern about the ground water contamination of the soil. is the soil, what level has that been remedia

and also steve ritchie is going to tell you a little bit about what puc does in the realm of ipm in particular. but we face sta -- facilitates meetings every year. they are great solving events. i invite you to attend if available. we also put together metrics, and day-to-day pesticide use on city properties and we organize annual trainings of various sorts. we do screenings of pesticides. my background is ib mks . birmingham -- m and do technical as well. here is a graph of pesticides used over time since 1996. on the x axis is the year and the y axis you have pound of active ingredient. the thing to look at is the dotted line, the total amount of pesticides used. one you will notice most of the reduction in the past few years. we got the easy stuff first and now we are working on the hard stuff. one thing you noticed there are some bumps along the road. in 2005-2011 these are golf tournaments. i will talk more about golf later. finally notice the red line which is herbicide use compared to the dotted line, you can see most of what we do in the city is weed control. weeds account for most of