The District regularly monitors water quality.

Throughout each year, the District collects over 3,500 water samples and flushes 500 fire hydrants in order to maintain the high-quality drinking water supply.

Watch: How EVWD Ensures Water Quality

Testing water quality at home

If you are curious about chlorine levels at your house or have questions about water quality, please contact the District’s Water Quality Team at (909) 806-4222.

Read the Current Consumer Confidence Report

Providing the community with the opportunity to access information about the quality of your drinking water, detected contaminants, and possible health risks is an important job for all water suppliers.

State and federal regulations currently in place are very important, and EVWD makes every effort to present this detailed information in a simplified manner.

The Consumer Confidence Report is made available to all customers each spring. Results found are based on an average of all samples collected throughout the year.

Download Recent Report

Man taking a water quality sample
EVWD water quality staff pulling a water sample in the community

Water Quality Sampling

Water Samples are collected weekly, monthly, quarterly, annually and tri-annually.

The District collects water samples to ensure the safety and quality of the water served. Sample frequency depends on State regulations and health risk factors. 

View the District’s sampling pyramid, which provides an example of the various samples and frequency of collection.

View Sampling Pyramid

Home Sampling

The District routinely samples water for harmful contaminants.

To ensure the safety of water being delivered to customers, East Valley Water District routinely samples water for harmful contaminants.

Samples collected by the District are representative of the water quality being delivered to customers through the meter. Results from samples may not be representative of the water found in the home like plumbing, treatment equipment, and fixtures vary in each home.

For information regarding home water sampling please contact the Water Quality Department at (909) 806-4222.

Image of pumps at plant 134
Water quality test

Total Trihalomethanes

About Total Trihalomethanes

Total Trihalomethanes (TTHMs) are a group of four chemicals that are formed during the water treatment process when chlorine reacts with organic materials such as leaves, plants, and soil in the untreated water.

The District regularly conducts water quality testing, including for Trihalomethanes or TTHM.

Helpful Resources

Water Quality Maintenance

The District's primary water quality goal is to protect public health and safety.

Water Quality Maintenence
Lead Testing in Schools

Join one of our fee community conservation workshops to learn how to save water.

Lead Testing in Schools
Sterling Natural Resource Center

Providing a sustainable new water supply to boost the region's water independance.

Sterling Natural Resource Center
State Water Resources Control Board

The Division of Drinking Water (DDW) regulates public water systems and more.

Visit waterboards.ca.gov

Contact Information

Mike Hurst
Water and Wastewater Compliance Supervisor

Email the Compliance Supervisor