Water Quality

Each year we publish water quality reports that provide customers with information on water supply sources and treatment in addition to a summary of the water quality tests from the previous year. Customers are sent reports annually in June, and digital archives are provided in the links below.

Water quality reports contain a lot of information that may seem overwhelming. What you can learn from your water quality report:

• The source of your water.
• If there is any USEPA regulation violation, it must be listed. If the report says that there isn’t a violation for a particular contaminant, the measurements are within safe limits.
• The levels of contaminants found in your drinking water.
• The likely source of any detected contaminants and the susceptibility of a water supply to potential contamination.
• The EPA Maximum Contaminant Levels (MCL). These are the levels at which certain contaminants are considered to be potentially harmful.

CUC Water Quality Reports

• ccr-cuc-2024 (pdf)
• ccr-cuc-2023 (pdf)
• ccr-cuc-2022 (pdf)
• ccr-cuc-2021 (pdf)
• ccr-cuc-2020 (pdf)
• ccr-cuc-2019 (pdf)
• ccr-cuc-2018 (pdf)

Harbor Island Water Quality Reports

• ccr-harborisland-2024 (pdf)
• ccr-harborisland-2023 (pdf)
• ccr-harborisland-2022 (pdf)
• ccr-harborisland-2021 (pdf)
• ccr-harborisland-2020 (pdf)
• ccr-harborisland-2019 (pdf)
• ccr-harborisland-2018 (pdf)
• ccr-harborisland-2017 (pdf)
• ccr-harborisland-2016 (pdf)