Ontario's drinking water is under the microscope.
Government data posted online shows 919 lead exceedances of the federal guideline in lead tests of tap water over the past two years.
Windsor had the highest number of exceedances at 289 — a quarter of tests conducted over the past two years.
Vice-President of Water Operations with EnWin, Garry Rossi told AM800's The TKO Show that he can understand the concern.
"To be honest with you, we've been on top of this problem along with the Government in Ontario, for quite some time now," he says. "Most municipalities employ some sort of lead mitigation program within their municipality."
Rossi says any issues are not caused within the production facility or distribution system.
"This is very service-by-service specific," he says. "We have 70,000 customers that we service and this is very specific as to the services that feed these customers."
Exceedance rates reached as high as 50% in some municipalities.
Rossi says people should also be aware of the pipes and fittings that service their home.
"We all know that lead solder has been used in older plumbing, brass fittings and actual faucets that people still like because they're very rustic looking, they're very nice to look at, but they do have a lead content in them," he says. "That's what they used to us in the manufacturing of those products."
In London, half of the 36 tests conducted last year exceeded the guideline, and tests in the town of Terrace Bay on the north shore of Lake Superior exceeded national standards nearly 21 per cent of the time.
Of the province's approximately 660 municipal water systems, only 123 — one in five — posted results of tests taken at homes during the past two years.
Of those, 42% had exceedances.