To: Honorable Mayor and Members of City Council
From: Phil Brun, Utilities Director
Prepared By: Joy Eldredge, Deputy Utilities Director
TITLE:
Title
Triennial Water Quality Report
LABEL
RECOMMENDED ACTION:
Recommendation
Receive the City's Triennial Water Quality Report pursuant to Health and Safety Code Section 116470, and determine this action is exempt from CEQA.
Body
DISCUSSION:
The City of Napa Water Division performs extensive water quality monitoring before, during and after the various stages of the water treatment process. In addition, the Water Division performs weekly monitoring throughout the water storage and distribution system to ensure the water meets or exceeds all water quality regulatory requirements. Maximum Contaminant Levels (MCLs) are enforceable water quality standards that are established by the US Environmental Protection Agency and the California State Water Resources Control Board Division of Drinking Water (DDW) that take into account analytical detection capability, treatment technology available, benefits, health effects, costs and practical implementation. The City's water system met all health-based drinking water standards and maximum contaminant levels required by DDW and USEPA during the last three years.
In addition to MCLs, CDPH also sets lofty public health "goals" or PHGs that are idealistic targets that may be based on emerging data in limited studies (human or non-human.) These goals are not required to be met by any public water system. They are set without consideration of practical risk-management factors such as analytical detection levels, available treatment technology, benefits and costs. The goals are often set at zero or at levels that challenge laboratory analytical detection limits. The State has set public health goals for a total of 93 constituents.
State law requires large water systems, such as the City's, to report every three years on whether at any time over the prior three-year ...
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