Belmont Terrace Mutual Water Company

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 and Notification 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 10/1/2026 showed manganese levels of 0.066 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

What should I do?

You do not need to use an alternative water supply (e.g., bottled water).

• 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 18-24 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: CA4900558.

Date distributed: October 6, 2026 —

From time to time, Belmont Terrace Mutual Water Co. must flush out the water system in order to remove sand and other sediment from the lines.  We’ll be flushing the system on:

     MONDAY, OCTOBER 19th starting at 9:00am and should be finished by 1:30pm.

Please DO NOT TURN ON ANY WATER during this time.  If you do, it is likely that sediment will be drawn into your home’s water lines. 

We will place flush signs the day/night before at Danmar (near church), Norlee near Bella Vista, and Danmar at Ragle.  We will place orange cones next to all the fire hydrants Monday morning before we start flushing.  The cones will stay in place until we are finished flushing.  Once ALL the cones are removed from in front of the fire hydrants water will be available to use. 

If you do experience cloudy water, please run a backyard hose or faucet for 5-10 minutes to help flush out the sediment.  If you have problems after that, please call the Water Operator, Debby at (707) 695-9098.

We will be trying to limit the time and amount of water we are flushing.  We need to do the flush for water quality purposes. 

Thank you for your cooperation!

Bruce Petersilge, Debby Turner and David Vigil, Jr.

Belmont Terrace Water Operators