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Water Testing

The Environmental Protection Agency (EPA) recommends private wells be tested annually. Without testing, the water quality is unknown and the water could be contaminated with natural-occurring or other contaminants.

There are a variety of bacteria, parasites, and viruses which can potentially cause health problems if humans ingest them. Testing water for each of these would be difficult and expensive. Instead, water testing for total coliform levels serves as an indicator of contamination.

Coliform bacteria can enter well water through different ways, including sewage overflows, damaged or malfunctioning sewage systems, polluted storm water runoff, and agricultural runoff. Private wells may become more vulnerable to such contamination after flooding or fires, particularly if the wells are shallow, have been dug or bored, or have been submerged by floodwater for long periods of time.

Testing Services

Shock Chlorination

Bacterial contamination of well water can come from many sources. The most common include repairing the pump or casing without follow-up chlorination, surface water entering pump or casing, poor construction of the well, or leaks in the well or well casing.

Shock chlorination of a well may eliminate the bacterial contamination, but well rehabilitation may be necessary if contamination continues to occur (as in a rusted or leaking casing). If you plan to shock chlorinate your well yourself, follow instructions carefully to ensure bacteria is eliminated.

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 Related Links


Contacts

Water Quality Program

303-441-1564
Submit a question

www.BoulderCountyWater.org

Boulder

3450 Broadway
Map & Directions
Hours: 8 a.m.-4:30 p.m. M-F

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