Water, Water Everywhere And Not A Drop To Drink
March 12, 2011 5:24 PM Subscribe
After having drainage and a sump pump installed in our basement, we’ve noticed an unusually large amount of groundwater being pumped out into the connecting dry well. We’d like to determine the source of this water, but, as usual, there are some unusual details….
posted by Rewind to home & garden (7 answers total) 2 users marked this as a favorite
A few years ago, after noticing light flooding in the basement after rainstorms, we had a contractor come in and construct a proper drainage setup with a sump pump leading to a dry well. For the past two or three months we’ve noticed, on average, that the sump pump pumps for about six seconds every two or three minutes, whether it’s raining or not. (Note: It has ALWAYS pumped since installation, but it seems to have increased in frequency lately.) That seems like a ridiculously high amount and we’d like to determine the source of this water coming in. Here are what seem to be the relevant details:
· We live midway up a hill, at the top of which is a covered reservoir used for the city’s water supply. Several years ago there was construction done in and around the reservoir (although I have no idea what exactly was done. I just saw the construction vehicles.)
· Thinking the source of this water might be a leak from the reservoir, we took a sample of the groundwater and had it tested for fluoride content, which came back negative. We have heard (although can't confirm) that the reservoir is the point where the fluoride is added. It's possible that the fluoride is added as the water is pumped out of the reservoir and thus we wouldn't have detected it, however there were also tests for other chemicals which might be found in city water, all with negative results.
· Several neighbors on our side of the street also have problems with excess water. Water seeps (very slowly) through cracks in driveways (especially noticeable in winter when it ices over) and a few neighbors have pumps going out into lawns or dry wells. Neighbors across the street don’t have problems with excess water but they DO have issues with their houses settling unevenly.
· The city (Newton, MA) has steadfastly denied that there is anything wrong with the reservoir and has instead blamed it on an underground river. While I have never seen any proof that such rivers exist, I have heard in the course of conversation with other city residents that there are apparently a number of them scattered around and that flooded basements are not uncommon among city residents as a result.
Does anyone have any ideas how we might determine the source of this water coming in? Are there services that can be hired to do this, or would these “rivers” be located on city maps? This has only been a problem within the past ten years, apparently. Prior to this, water would come in under extreme circumstances (very heavy rains for an extended period) but otherwise the basement remained dry. Any thoughts would be appreciated.