Tap Truth EPA drinking water records, in plain English

County drinking water records

Mono County, CA drinking water systems

19 community water systems serve Mono County, CA, reporting 18,819 people served in all.

8 of them (42%) had at least one health-based violation in the last 10 years. 7 systems still have one unresolved.

16 rely mainly on groundwater and 3 on surface water, counting water bought from other systems.

16 systems filed a lead service line inventory listing 0 lead lines, 0 galvanized lines that must be replaced and 3,227 lines of unknown material.

1 more system is placed in Mono 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
19
People served, sum of each system's own figure
18,819
Systems with a health-based violation, last 10 years
8
Systems with one unresolved
7
Lead service lines in inventories
0

Water systems serving Mono County

19 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
Mammoth CWD Mammoth Lakes 8,234 Surface water 1 0 0
June Lake PUD - Down Canyon June Lake 2,810 Surface water 3 2 No inventory
June Lake PUD Village June Lake 2,763 Surface water 3 2 No inventory
Usmc/Mtn Warfare TRNG Ctr - Bridgeport Outside cities and towns 1,200 Groundwater 0 0 0
Lee Vining Public Utility District Lee Vining 672 Groundwater 0 0 0
Bridgeport PUD Bridgeport 524 Groundwater 10 2 0
Mountain Meadows MWC Crowley Lake 505 Groundwater 0 0 0
Usmc - Housing Coleville Coleville 424 Groundwater 0 0 0
Lower Rock Creek Mutual Water Co. Paradise 310 Groundwater 1 2 0
Washoe Tribe Woodfords Walker 250 Groundwater 0 0 0
Crowley Lake Trailer Park Crowley Lake 230 Groundwater 1 2 No inventory
Utu Utu Gwaitu Paiute Tribe Crowley Lake 222 Groundwater 14 26 0
Crowley Lake Mutual Water Company Crowley Lake 175 Groundwater 0 0 0
Birchim Community Service District Sunny Slopes 150 Groundwater 0 0 0
Wheeler Crest CSD Swall Meadows 86 Groundwater 0 0 0
Sierra East HOA Walker 84 Groundwater 22 3 0
Lundy Mutual Water Company Mono City 70 Groundwater 0 0 0
Cold Water Canyon MWC Chalfant 65 Groundwater 0 0 0
Chalfant Valley West M.W.C. Chalfant 45 Groundwater 0 0 0

Systems placed by county record in Mono County

1 system

The service area map EPA has for this system does not line up with its own records. 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
White Mountain Mutual Water Company County on record 142 Groundwater 0 0 0

Cities and towns in Mono County

12 places

Back to California

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