May
27th

NYC DEP: 2007 DRINKING WATER SUPPLY AND QUALITY REPORT


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2007 DRINKING WATER SUPPLY AND QUALITY REPORT

Last week, the New York City Department of Environmental Protection presented its 2007 Annual Water Quality Report. This report was prepared in accordance with Part 5-1.72 of the New York State Sanitary Code (10NYCRR), and the National Primary Drinking Water Regulations, 40 CFR Part 141 Subpart O, of the United States Environmental Protection Agency (EPA), which require all drinking water suppliers to provide the public with an annual statement describing the water supply and the quality of its water.

The 20 page report opens as a pdf and is here: 2007 Water Quality Report (PDF)

http://www.nyc.gov/html/dep/html/drinking_water/wsstate.shtml

Click on the link above to read the previous years REPORTS and/or return to our page for a chance to comment.

Filed under Drinking Water | Posted by karen



5 Responses to “NYC DEP: 2007 DRINKING WATER SUPPLY AND QUALITY REPORT”

  1. By karen on May 27, 2008 | Reply

    This report says:

    “With respect to the Croton System, the City is proceeding with the construction of a filtration plant for Croton System water, pursuant to the terms of a November 1998 federal court Consent Decree entered into with the United States and the State of New York. The filtration plant is expected to reduce color levels, the risk of microbiological contamination, and disinfection byproduct (DBP) levels in the Croton System water. The filtration plant will also ensure compliance with stricter water quality standards.”

    But that is not what they said when they were forcing to build this project. They said:

    “. . . Croton System’s chronic problems such as taste, color and odor, will remove midge larva and will enhance public comfort with the adequacy of the Croton water supply. Under the present conditions, Croton water consumers may sometimes receive lower quality water then consumers receiving Catskill/Delaware water. . . . . Croton water is affected by seasonal problems that cause aesthetic concerns related to color, odor and taste. . . .”

    NYC DEP White Paper, May 23, 2003, page 3 (http://www.nyc.gov/html/dep/pdf/croton/whitepaper.pdf)

  2. By karen on May 27, 2008 | Reply

    Here is a quote on the status of the Kensico City Tunnel:

    Facility planning for Stage 3 of the tunnel is ongoing, with a final facility plan and conceptual design expected by mid-2008. Stage 3, referred to as the Kensico-City Tunnel (KCT) involves construction of a 16-mile section that extends from the Kensico Reservoir to a valve chamber in the Bronx. When completed, the KCT will be able to deliver water directly from Kensico Reservoir to Tunnel No. 3. In total, Tunnel No. 3 will span 60 miles. Construction is expected to be completed by 2025.

  3. By karen on May 27, 2008 | Reply

    And the DEP staff is working hard to check up on the Croton System. Read what the report says about Turbidity:

    “One Croton System entry point turbidity sample exceeded 1.49 NTUs on August 25, 2007 with a value of 2.33 NTU. If the daily entry point analysis exceeds 1 NTU, a repeat sample must be taken within one hour. DEP failed to collect a repeat sample on August 25, 2007 and was issued a Tier 3 monitoring violation by NYSDOH.

    There was another Croton System entry point turbidity sample which exceeded 1.49 NTU on October 8, 2007 with a value of 2.62 NTU. DEP failed to collect a repeat sample on October 8, 2007 and was issued a second Tier 3 monitoring violation by NYSDOH.”

  4. By karen on May 27, 2008 | Reply

    They also had some problems with the Federal Lead and Cooper Rule (LCR):

    In 2004, NYSDOH issued a NOV asserting violations of the LCR. This NOV was in
    relation to DEP’s reporting of past data collected under the LCR, specifically a failure
    to report all results, a failure to utilize all results to determine the 90th percentile
    concentrations, and a failure to collect samples during the period of June 1 to
    September 2004. In 2005, under the NOV, DEP re-instituted a lead public education
    program, returned to semi-annual at-the-tap monitoring in the distribution system,
    began monitoring the surface and groundwater systems separately for lead, and
    established a program to replace City-owned lead service lines (LSLs). Working with
    other City agencies through an inter-Agency Task Force, 55 LSLs were replaced in 2005,
    and 1 was replaced in 2006.

  5. By karen on May 27, 2008 | Reply

    As for monitoring Crypto and Giardia, here is what the report states:

    In 2007, from January 1 to December 31, a total of 106 routine samples at the Kensico
    Reservoir effluents and 53 routine samples at the New Croton Reservoir effluent were
    11 collected and analyzed for Cryptosporidium oocysts and Giardia cysts using Method 1623 HV (US EPA). Of the 106 routine Kensico Reservoir samples, five were positive for Cryptosporidium (0 to 1 oocysts 50L-1), and 84 were positive for Giardia (0 to 10 cysts 50L-1). Of the 53 routine New Croton Reservoir samples, three were positive for Cryptosporidium (0 to 1 oocysts 50L-1), and 28 were positive for Giardia (0 to 9 cysts 50L-1). Enhanced samples were collected at the Kensico effluents on six occasions in 2007 to monitor protozoa in response to changes in water quality data.

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