07th Jul 2026
IMPORTANT INFORMATION ABOUT YOUR DRINKING WATER
click here for printable version BELMONT TERRACE Manganese Notification 7/3/2026
Este aviso contiene información muy importante sobre su agua potable, por favor lea el aviso en español si va aquí incluido. Si el aviso en español no va incluido aquí, contacte al sistema de agua para pedir una copia.
Belmont Terrace Mutual Water Company Has Levels of Manganese
Above the Secondary Maximum Contaminant Level
Our water system recently violated the manganese secondary maximum contaminant level (MCL) and notification level of 0.05 milligrams per liter (mg/L). Manganese levels in excess of 0.05 mg/L affect the color of water delivered to customers. The notification level is a non-regulatory, health-based advisory level established as a precautionary measure which based on available scientific information, does not pose a significant health risk but warrants notification
Although this is not an emergency, as our customers, you have a right to know what you should do, what happened, and what we are doing to correct this situation.
We routinely monitor for the presence of drinking water contaminants. Water sample results received on 7/1/2026 showed manganese levels of 0.068 mg/L. This is above the secondary MCL and notification level of 0.05 mg/L, but less than the health-based response level of 0.20 mg/L, established to protect formula-fed infants.
The State Water Resources Control Board (State Water Board), Division of Drinking Water (DDW) information and frequently asked questions for manganese can be found at: https://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/Manganese.html.
You do not need to use an alternative water supply (e.g., bottled water).
What should I do?
- This is not an emergency. If it had been, you would have been notified immediately. However, some people may notice water discoloration, and possibly taste and/or odor issues with their drinking water. This is not considered a health concern.
- If you have other health issues concerning the consumption of this water, you may wish to consult your doctor.
What happened? What is being done?
Well testing is being done quarterly and reported to the State of California. Belmont Terrace Mutual Water Company (BTMWC) is working closely with The California Division of Drink Water and other consultants to determine measures that will bring us into compliance with state requirements. In 2024 we increased chlorination levels to reduce manganese entering the distribution system which was effective. We now must implement a system to remove manganese from the well before it enters the system. We anticipate resolving the problem within the next 9-12 months. Updates will be shared with customers as progress continues.
For questions, contact us at Board@BelmontTerrace.org.
Please share this information with all the other people who drink this water, especially those who may not have received this notice directly (for example, people renting rooms or ADU’s.)
This notice is being sent to you by: Belmont Terrace Mutual Water Company.
State Water System Number: CA4900588.
Date distributed: July 3, 2026
