Tap Truth EPA drinking water records, in plain English

County drinking water records

Lake County, CA drinking water systems

45 community water systems serve Lake County, CA, reporting 66,833 people served in all.

14 of them (31%) had at least one health-based violation in the last 10 years. 11 systems still have one unresolved.

28 rely mainly on groundwater and 17 on surface water, counting water bought from other systems.

42 systems filed a lead service line inventory listing 0 lead lines, 0 galvanized lines that must be replaced and 1,300 lines of unknown material.

1 more system is placed in Lake County, CA by the county its records name because it has no service area map that lines up with its own records, so it is listed apart and not counted here.

Community water systems
45
People served, sum of each system's own figure
66,833
Systems with a health-based violation, last 10 years
14
Systems with one unresolved
11
Lead service lines in inventories
0

Water systems serving Lake County

45 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Highlands Mutual Water Company Clearlake 7,772 Surface water 4 0 0
Hidden Valley Lake CSD Hidden Valley Lake 6,235 Groundwater 0 0 0
Konocti County Water District Clearlake 5,928 Surface water 0 0 0
City of Lakeport Lakeport 4,762 Surface water 0 0 0
Golden State Water Co.-Clearlake System Clearlake 4,644 Surface water 0 0 0
Mt. Konocti Mutual Water Company Clearlake Riviera 4,360 Surface water 3 0 0
Kelseyville Co Waterworks District 3 Kelseyville 4,102 Groundwater 0 0 0
Lake County CSA 21 - North Lakeport North Lakeport 4,046 Surface water 0 0 0
Cobb Area County Water District Cobb 3,515 Groundwater 1 3 0
Nice Mutual Water Company Nice 2,929 Surface water 0 0 0
Clearlake Oaks County Water District Clearlake Oaks and land outside it 2,359 Surface water 2 0 0
Lucerne Water Co. - Cal Water Service Lucerne 2,129 Surface water 0 0 0
Lake County CSA 20 - Soda Bay Soda Bay and land outside it 2,003 Surface water 0 0 0
Callayomi County Water District Middletown 1,598 Groundwater 1 2 No inventory
Lake County CSA 2 - Spring Valley Spring Valley 1,531 Surface water 0 0 0
Buckingham Park Water District Outside cities and towns 1,521 Surface water 0 0 0
Lower Lake County Water District Lower Lake 1,326 Groundwater 0 0 0
Upper Lake County Water District Upper Lake 989 Groundwater 0 0 0
Loch Lomond Mutual Water Co Outside cities and towns 693 Groundwater 1 2 0
Harbor View Mutual Water Company Outside cities and towns 550 Surface water 0 1 0
Lake County CSA 13 - Kono Tayee Lucerne 449 Groundwater 0 0 0
Big Valley Rancheria Water District Outside cities and towns 417 Groundwater 0 0 0
Anderson Springs CSD Outside cities and towns 373 Groundwater 0 0 0
Glenhaven Mutual Water Company Outside cities and towns 300 Groundwater 0 0 0
Konocti Shores Outside cities and towns 277 Groundwater 0 0 0
Cal 20 Village and Meadow Pointe Park Upper Lake 255 Groundwater 0 0 0
Clear Water Mutual Water Company Outside cities and towns 252 Surface water 0 0 0
Walnut Cove Mobile Estates Outside cities and towns 200 Groundwater 0 0 0
Bella Lago Mobile Home Park Outside cities and towns 152 Groundwater 1 2 0
Pier 1900 Homeowner's Association Lakeport 152 Groundwater 1 2 No inventory
Corinthian Bay Mutual Water Company Outside cities and towns 150 Groundwater 0 0 0
Westwind Mobile Home Park Outside cities and towns 104 Surface water 1 0 0
CDF-Konocti Conservation Camp No. 27 Outside cities and towns 100 Groundwater 0 0 0
Blue Lakes Improvement Club Outside cities and towns 90 Groundwater 1 2 No inventory
Sunrise Shore Mutual Water Company Outside cities and towns 83 Groundwater 0 0 0
Lazy S Mobile Ranch Outside cities and towns 73 Surface water 15 0 0
Baycliff Water Outside cities and towns 70 Groundwater 0 0 0
Blue Lakes Village Outside cities and towns 65 Groundwater 0 0 0
Villa Blue Estates Water District Outside cities and towns 60 Groundwater 0 1 0
Innisfree Water Company Outside cities and towns 56 Groundwater 0 1 0
Twin Creeks Mobile and RV Village Lower Lake 50 Groundwater 1 2 0
Blue Lakes Mobile Home Park Outside cities and towns 32 Groundwater 1 2 0
Golden State Water Company - South Shore Outside cities and towns 30 Surface water 21 0 0
Mountain of Attention Water Outside cities and towns 26 Groundwater 0 0 0
Windflower Point Mutual Water Company Outside cities and towns 25 Groundwater 0 0 0

Systems placed by county record in Lake County

1 system

EPA has no service area map for this system. It is placed by the county its records name (the counties EPA lists it serving, or the county coded in its ID where EPA lists none), and without a map it is not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Middletown Rancheria Community Water System County on record 487 Purchased groundwater 1 4 0

Cities and towns in Lake County

15 places

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Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations