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Assessment of the possibility of lead contamination

In light of the increased national awareness and concerns regarding lead contamination in the water supply the Green Mountain Water and Sanitation District (the “District”) is undertaking an assessment of the exposure of lead contamination in the District’s water supply.

This assessment is based on the testing requirements and practices of the Board of Water Commissioners for the City and County of Denver (“Denver Water”) from whom the District purchases the water that is distributed throughout the District. This assessment is also based on the District’s historical records regarding the various neighborhoods within the District as well as District policy relating to the issuance of tap permits and past remediation efforts undertaken by the District.

Denver Water is responsible for the testing of water for lead exposure throughout the District’s water distribution system. Denver Water routinely and systematically tests water at several locations through out the District for lead contamination as part of its overall water quality testing for the District. Denver Water reports to the Colorado Department of Public Health and Environment (the “CDPHE”) any lead contamination within Denver Water and the District’s integrated water distribution system. There were no reported instances of lead contamination as of September 30th 2013 in Denver Water and the District’s integrated water distribution system.

The District also inquired of the CDPHE, Water Quality Division in March of 2016 and was informed that the District is in compliance with their regulations regarding water quality.

In the past, the District was aware of the possibility of lead service lines and galvanized main lines in the Glennon Heights neighborhood which borders W. Alameda on the North, W. Exposition on the South, Quail on the West and Kipling on the East. These main water lines and the connected service lines were replaced between 1967 and 1971.

This neighborhood is also susceptible to having galvanized piping from the water main to the meter pit and galvanized piping inside the individual residences.

Denver Water treats the pH level of the water sold to its distributors, including the District, to mitigate the corrosion in water service lines. Despite this treatment, there could still be a slightly higher risk of lead contamination in the water of those houses in this neighborhood due to the corrosion of the galvanized pipes.

The District will conduct a field level inspection of the meter pits in the Glennon Heights neighborhood for the purpose of identifying houses with an increased likelihood of having galvanized pipes. Once those houses are identified, the District will conduct testing of lead in the water supply of randomly selected houses. The District will then determine if the random tests show an amount of lead in the water sufficient to warrant the notification of the homeowners whose houses were not among those randomly sampled, and advise them that tests of their water should be conducted. The District expects to have the field level inspections of the meter pits and samples submitted for testing by September 1st 2016.

Based on the testing requirements and practices of Denver Water, the determination by the CDPHE that the District is in compliance with its health standards and the results of past remediation and regulatory practices of the District it is believed that the risk of lead contamination in the District’s water supply is minimal, however, in an abundance of caution and as a service to its customers the District will be undertaking the random testing, described above, of the residences in the Glennon Heights neighborhood.

If a risk of lead contamination does exist, that risk is most likely to be in the service line, which distributes water from the water main to the individual residence or in the piping inside of the individual residence. The repair or replacement of the service lines and piping inside the residence is the responsibility of the homeowner.

Additional information regarding water testing can be found at

https://www.colorado.gov/pacific/cdphe/water-testing or by calling 303-693-3048

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