Public Drinking Water Branch

2003 Annual Compliance Report of Missouri Drinking Water Systems

Report shows consistency in drinking water compliance

The Annual Compliance Report of Missouri Drinking Water Systems for 2003, published by the Missouri Department of Natural Resources (DNR), is now available. The report, compiled by the Water Protection Program, describes the extent of violations by Missouri public water systems during 2003.

The 2003 Annual Compliance Report

The 2003 Annual Compliance Report of Missouri drinking water systems published by the Department of Natural Resources is now available. The report describes the extent of violations by Missouri public water systems during 2003.

This report covers Missouri’s 2,668 public water systems. Overall, the violations by Missouri’s public water systems remains fairly constant from 2002 to 2003, meeting the U.S. Environmental Protection Agency’s goal of 95 percent compliance.

While the impact of more sensitive testing methods for coliform bacteria continues to keep the total coliform Maximum Contaminant Level (MCL) violations higher than historical levels, progress has been made. The number of total coliform violators and the number of acute coliform violators have decreased again this year. MCL violations for total coliform bacteria decreased 15 percent and acute MCL violations for fecal coliform/E coli decreased by 8 percent. Major monitoring violations of the Total Coliform Rule have also decreased by 19 percent.

As a result of new standards that took effect in 2003, the number of radionuclide monitoring and MCL violations increased. The new regulation changed the procedures for monitoring for radionuclides, requiring every entry point to be tested.

Many public water systems perform testing beyond that required by the state. A public water system, by definition, provides water for human consumption to at least 15 service connections or serves an average of 25 people for at least 60 days each year. County sanitarians and the Missouri Department Missouri Department of Health and Senior Services, rather than the Department of Natural Resources facilitate water testing at systems serving fewer people than this.

There are three basic types of public water systems. The first is a community system, where people live and consume the water on a daily basis. A community system could serve the residents of a large city, rural water district, or a small mobile home park or subdivision. The second is a non-transient, non-community system, such as a school or factory, where people drink the water on a daily basis, but do not reside there. The third is a transient, non-community system, such as a restaurant, resort or campground that would not be a regular source of drinking water for most of its pass-through customers.

The Annual Compliance Report lists all systems with MCL violations and chronic monitoring violators of the Total Coliform Rule. A number of systems missed collecting samples for one or two months; few systems missed sampling for three or more months. Only 120, or 4.5 percent of Missouri systems were listed as Significant Noncompliers for 2003.

For all violations, public water systems are required to notify their customers long before the department issues the Annual Compliance Report and community systems send out their Consumer Confidence Report. The method of notification varies by the violation and system type. Water suppliers must then report back to the department how the public notice was done and provide a copy for the system’s file. When problems are found, the department works closely with public water systems to help them return to compliance in a timely manner.

The following table summarizes the violation statistics from the 2003 Annual Compliance Report.

Contaminant Group/Rule Type of Violation Number of Violations Number of Systems with Violations
Organic Chemicals Monitoring 105 5
Organic Chemicals MCL * 0 0
Disinfection By Products Monitoring 0 0
Disinfection By Products MCL * 0 0
Inorganic Contaminants Monitoring 55 5
Inorganic Contaminants MCL * 6 3
Nitrate Monitoring 62 62
Nitrate MCL * 0 0
Radionuclides Monitoring 30 21
Radionuclides MCL * 22 21
Total Coliform Rule Monitoring 960 523
Total Coliform Rule MCL * 527 339
Surface Water Treatment Monitoring 0 0
Surface Water Treatment Treatment 7 6
Lead and Copper Monitoring 101 101
Lead and Copper Treatment 0 0
Consumer Confidence Report Reporting 485 288
 
* MCL = Maximum Contaminant Level

You can receive a copy of the 2003 Annual Compliance Report of Missouri Public Drinking Water Systems by accessing the 2003 Annual Compliance Report or by writing to the address at the bottom of this page, or call 800-361-4827 or 573-751-5331.