City of The Colony

The City of The Colony maintains and regularly tests our municipal water supply for quality and safety. Our water is meticulously regulated to ensure it meets all standards established by environmental authorities.

The water we provide comes from several sources. Our primary supply includes five city-owned wells producing up to 9 Million Gallons per Day (MGD) from the Trinity Sands Aquifer (four wells) and Paluxy Aquifer (one well). We also purchase up to 6 MGD of treated surface water from Dallas Water Utilities, sourced from reservoirs including Lake Lewisville, Lake Ray Roberts, Lake Ray Hubbard, Lake Tawakoni, and Lake Fork.

For residents in the Austin Ranch area (south of Highway 121 and east of the MYCKET Railroad line), we purchase up to 4 MGD from the City of Plano, which receives its water from North Texas Municipal Water District reservoirs: Lake Lavon, Lake Jim Chapman, and Lake Texoma.

Our state-licensed operators continuously monitor water quality throughout our distribution system according to federal and state regulations. In our most recent water loss audit, The Colony's system reported approximately 11.8% loss of system input volume - a figure we're actively working to improve.

If you have questions about water quality, contaminants, or lead exposure (which can particularly affect pregnant women and young children), please contact our office. We recommend flushing your tap for 30 seconds to 2 minutes after water has been sitting in pipes to minimize potential lead exposure.

Remember that all water, including bottled water, may contain small amounts of some contaminants. The presence of contaminants doesn't necessarily indicate a health risk, as the EPA establishes limits to ensure public safety. For more information about contaminants and potential health effects, please call the EPA's Safe Drinking Water Hotline (1-800-426-4791).

1. What contaminants are most concerning in The Colony's water supply? Tests have identified Paraquat, 1,2,4-Trimethylbenzene, Molybdenum, and various microbiological contaminants as potential concerns.
2. How often is The Colony's water tested? The water is continuously monitored, with comprehensive testing conducted according to EPA and TCEQ schedules for different contaminants.
3. What causes water hardness in The Colony? The water hardness primarily comes from dissolved minerals like calcium and magnesium present in the groundwater sources.
4. How can residents reduce exposure to potential contaminants? Using certified water filters designed for specific contaminants, regularly flushing taps after periods of non-use, and staying informed about water quality reports can help reduce exposure.
5. Where can I find the latest water quality report? The most recent annual water quality report is available on the city's website or by contacting the water department directly.