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2015 Urban Water Management Plan Update

The City is required to update its Urban Water Management Plan (UWMP) every five years per State law. The UWMP is prepared to ensure the efficient use of available water supplies, describe and evaluate the existing water system and historical and projected water use, evaluate current and projected water supply reliability, describe and evaluate demand management measures, and provide water shortage contingency plans as required by State law. By preparing the 2015 UWMP, the City continues its commitment to intelligent planning and management of its water supplies. The 2015 UWMP also includes information on the City's progress towards the 20 percent by 2020 conservation requirement of the Water Conservation Bill of 2009 (SB X7-7). The draft 2015 UWMP was available for public review on April 11, 2016 and written comments were accepted through May 25, 2016.

The Lodi City Council held a public hearing to consider adoption of the 2015 Urban Water Management Plan (UWMP) at its regular meeting on Wednesday, June 1st at 7:00 p.m. The UWMP was adopted by resolution 2016-90.

A summary of the UWMP, including the City’s progress towards achieving the 2020 conservation targets, was presented at the public hearing.

Errata Sheet for 2015 UWMP (pdf file)

2015 Urban Water Management Plan (pdf file)

2010 Urban Water Management Plan (pdf file)

2005 Urban Water Management Plan (pdf file)


Where does the City of Lodi's water supply come from?

In 2015, the Lodi surface water treatment plant provided approximately 40 percent of Lodi’s drinking water. Twenty eight computer controlled wells, located throughout the City, provided high quality groundwater. The wells operate automatically on water pressure demand so that when water use increases, more wells are started. Additionally, seven wells are equipped with Granular Activated Carbon (GAC) filtration units to ensure high quality water.

Lodi is fortunate in having a high quality groundwater supply. However, that supply is at risk and must be carefully managed. The following section describes some of these measures.

The City, working with regulatory agencies and potentially responsible parties in a cooperative manner, is pursuing a resolution to a groundwater contamination problem in the north and central Lodi area. While no operating wells are out of compliance with any State or Federal drinking water standards, the contamination is a serious threat. PCE (Tetrachloroethylene) and TCE (Trichloroethylene) have been detected in samples taken in soils and groundwater. The City's consultants have developed a computer model of the groundwater, which will enable the City to optimize the number, size and location of wells to accomplish the cleanup in an efficient manner. The City’s share of these costs has largely been determined and funding secured through insurance company settlements has been set aside to pay for this work. If you would like to obtain the latest TCE/PCE Cleanup and Groundwater Monitoring Report, please call 209-333-6878.

Dibromochloropropane (DBCP) was used by area farmers to kill nematodes in vineyards. DBCP was banned in California in 1977, but is still present in trace levels in some groundwater. The City of Lodi used 26 (of 28) wells to provide drinking water in 2015. The wells are rotated so over the course of time, water being delivered is a blend from these wells. Thirteen of Lodi’s wells have no detectable DBCP. Seven wells have Granular Activated Carbon (GAC) filters to remove DBCP. All wells used in 2015 met State and Federal drinking water standards. The result is that the people of Lodi are being served water below the DBCP level deemed safe by the U.S. EPA and the State of California. In 1996 the City settled a lawsuit against DBCP manufacturers, who have already paid the City for a large portion of Lodi’s costs related to DBCP treatment. These manufacturers will continue to pay a large portion of the City’s DBCP related costs for the settlement’s 40-year term. If you would like to obtain the latest GAC Filtration and DBCP Report, please call 209-333-6878.

Information on Lead in your drinking water

In late February 2016, US EPA, prompted by recent events in Flint, Michigan and other US cities, wrote states about the need to enhance at all levels of government the oversight of implementation and enforcement of drinking water regulations, including the Lead and Copper Rule.  In an effort to enhance public transparency and public access to data and compliance information the City will now make the latest Lead and Copper Report available on our website. The results from the City's Lead and Copper sampling continue to meet all State and Federal drinking water standards. Please note, the City has a limited number of lead joints and service lines remaining in the distribution system. Most lead service has been replaced over the years and will continue to be removed during the final phases of the metering program. In addition, the City exercises corrosion control methods which protect the pipes and decrease the rate of corrosion. Lead found in tap water usually comes from the corrosion of internal household plumbing with older fixtures or from the solder that connects pipes. The latest Lead and Copper Report and additional information can be found below. For further questions please call 209-333-6740.

For more information on Water Quality please click on the link below:

2017 Water Quality Report (published April 2018)

Draft Public Health Goal Report (published October 2016)

Public Health Goal Report (published September 2013)

2015 Lead and Copper Rule Report

Additional information regarding Lead can be found at:



Water Meter Retrofit Program

The City of Lodi has begun installing water meters on all unmetered properties in its service area.  This is in accordance with California Assembly Bill 2572, which requires the installation and use of water meters throughout the State. To date, nearly 3,000 residential water meters have been installed as part of the City’s Water Meter Retrofit Program. This is in addition to the existing 1,100 commercial and industrial meters.

To learn more about the City of Lodi's water meter program, click here.

AB 2572 was signed into law by Governor Schwarzenegger in September 2004 to reduce water-waste and encourage conservation. Studies by the California Public Utilities Commission have shown that communities with metered water systems use 7 to 20 percent less water than non-metered areas.  All residential and many commercial customers are currently charged a flat-rate fee for water, which is billed monthly, based on the number of bedrooms being served, regardless of how much water they use.  For example, a single person living in a four bedroom home is being charged more than a family of four living in a three bedroom home. A metered system discourages waste and rewards conservation by accurately measuring water usage and billing each household and business based on their actual water consumption. Customers are probably already familiar with this type of "usage billing" for other utility services like electricity, gas and telephone.

The City of Lodi provides very high quality water to more than 63,000 people. By working to conserve this critical resource, our residents can continue to count on a reliable supply of high quality drinking water for generations to come.

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