February 23, 2004

January Water System Failure Report


(Este informe contiene información muy importante sobre su agua potable.  Tradúzcalo ó hable con alguien que lo entienda bien.)


The following notice is to inform the public about a recent failure of the City of Lodi’s Water System to meet a primary drinking water standard in January of 2004.  The notice below explains that the drinking water system’s percent of bacteriological samples that were positive for total coliform bacteria was 6.9%, exceeding the allowable of 5% in any one month.  There were no Fecal/E. coli bacteria detected in any of the samples. That same week the City traced the problem to a City well and it was shut down.  Lodi’s drinking water was chlorinated from
January 10 through January 22, 2004. The problem is believed to be from rain water that ran into a ¾ inch hole on the base of a well from which a plug had fallen out. The well was chlorinated, tested and eventually put back on line.  All similar plugs in this well, and in other wells, have been replaced with an improved design. The San Joaquin County Department of Public Health has determined that there were no elevated levels of water borne illnesses reported during the time of the incident.


During the month of January 2004, the City of Lodi (City) Water System failed the maximum contaminant level (MCL) for total coliform bacteria indicative of the water quality standards for bacteriological quality as prescribed by the California Domestic water Quality and Monitoring Regulations.  Fecal coliform/E. coli were absent in all total coliform positive samples.


The Department of Health Services (Department) sets drinking water standards and has determined that the presence of total coliform is a possible health concern.  Total coliform are common in the environment and are generally not harmful themselves.  The presence of these bacteria in drinking water; however, generally is a result of a problem with water treatment or the pipes, which distribute the water, and indicates that the water may be contaminated with organisms that can cause disease.  Disease symptoms may include diarrhea, cramps, nausea, and possibly jaundice, and any associated headaches and fatigue.  These symptoms, however, are not just associated with disease-causing organisms in drinking water, but may also be caused by a number of factors other than your drinking water.  The Department has set an enforceable drinking water standard for total coliform to reduce the risk of these adverse health effects.  Under this standard, no more than 5.0 percent of the samples collected during a month can contain these bacteria, except that systems collecting fewer than 40 samples/month that have one total coliform positive per month are not violating the standard.  Drinking water, which meets this standard is usually not associated with a health risk from disease causing bacteria and should be considered safe.


The finding of coliform bacteria in routine samples necessitated the issuance of this notice to all consumers of the City’s Water System.  After additional repeat samples that were negative for coliform bacteria, the water was determined to be safe for drinking.


No further action is required on your part at this time.


Consumers wishing more information should contact the City of Lodi Water System at


Frank Beeler, Assistant Water/Wastewater Superintendent