A privately owned Class D water utility serving Bear Valley, California in Alpine County. LAWC is dedicated to being the best Class D water company in California by providing drinking water of the highest quality and knowledgeable and friendly customer service. Read More →
Recent News and Updates
Ongoing compliance for Disinfection Byproducts
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Lake Alpine Water System is in compliance and below the Maximum Contaminant Level (MCL) for the disinfection byproducts of Haloacetic Acids (HAA) and Trihalomethanes (TTHM). This is a customer notice with GOOD news!
The granular activated carbon (GAC) filter seems to be working well in reducing organics, the precursors for disinfection byproducts. As a result, we are back in compliance with low levels of HAA and TTHM byproducts.
The decreasing trend is great news for your water quality and we will keep you posted on future results, too.
Sample Date (month/date/year):
7.7.17
10.12.17
1.3.18
4.4.18
MCL
HAA Site Averages
43.3
25.0
50.9
24.3
60.0
Sample Date (month/date/year):
7.7.17
10.12.17
1.3.18
4.4.18
MCL
TTHM Site Averages
35.5
17.7
33.3
19.3
80.0
Disinfection Byproducts Compliance
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With the success of the granulated activated carbon (GAC) in removing organic carbons, we are once again in compliance for disinfection byproducts. The GAC has been removing at least 40% of the organic carbons. These organics react with chlorine to form disinfection byproducts. The more organics we can remove prior to disinfection with chlorine, the less byproduct formation. This is great news for our water quality. We will continue to improve the GAC process in the coming months.
Disinfection Byproduct Levels decreasing!
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We are making good progress on our efforts to reduce disinfection byproducts in the drinking water. The granular activated carbon filter is effectively removing 60% or more of the organics which means they are not present to react with the chlorine. However, due to high levels in previous quarters, our water system did not meet the drinking water standard in the fourth quarter, October - December of 2017.
We monitor on a quarterly basis for the presence of drinking water contaminants including disinfection byproducts. On October 12, 2017, results for Haloacetic Acids (HAA) were 25.0 parts per billion which is below the maximum contaminant level (MLC) of 60 parts per billion. However, due to
previous higher results, the annual average level of HAA was 73.5 parts per billion so a customer notice is necessary. For the full notice, click here.
Winter Ice on Bear Lake
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A friendly reminder to stay off of Bear Lake! Please do not risk your life or your equipment to the stability of the ice on Bear Lake. With the new aeration system emitting bubbles to the surface, the lake will not completely freeze over. Stay safe and stay off! Thank you!