Tap Truth EPA drinking water records, in plain English

County drinking water records

Alameda County, CA drinking water systems

13 community water systems serve Alameda County, CA, reporting 2,226,756 people served in all. A system that also serves other counties counts all of its customers here.

1 of them (8%) had at least one health-based violation in the last 10 years. 1 system still has one unresolved.

2 rely mainly on groundwater and 11 on surface water, counting water bought from other systems.

Their lead service line inventories list 0 lead lines, 3,935 galvanized lines that must be replaced and 14,546 lines of unknown material.

1 more system is placed in Alameda 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
13
People served, sum of each system's own figure
2,226,756
Systems with a health-based violation, last 10 years
1
Systems with one unresolved
1
Lead service lines in inventories
0

Water systems serving Alameda County

13 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
East Bay MUD Oakland, Richmond and 42 more 1,442,800 Surface water 0 0 0
Alameda County Water District Fremont, Newark and 2 more 344,000 Surface water 0 0 0
City of Hayward Hayward, Fairview and 1 more 162,954 Purchased surface water 0 0 0
Dublin San Ramon Services District Dublin and San Ramon 98,776 Purchased surface water 0 0 0
City of Pleasanton Pleasanton, Sunol and 1 more 76,689 Purchased surface water 0 0 0
California Water Service - Livermore Livermore 60,414 Purchased surface water 0 0 0
City of Livermore Livermore 38,892 Purchased surface water 0 0 0
Alameda Point Alameda 1,400 Purchased surface water 0 0 0
Trailer Haven Mobile Home Park San Leandro 459 Purchased surface water 0 0 0
Town of Sunol - Sfpuc Sunol 281 Purchased surface water 0 0 0
Norris Canyon Property Owners Assn Castro Valley 50 Groundwater 1 2 0
Zone 7 Water Agency Sunol, Livermore and 2 more and land outside them 40 Surface water 0 0 0
Sfpuc-Pleasanton Wells Outside cities and towns 1 Groundwater 0 0 0

Systems placed by county record in Alameda 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
Castlewood Domestic Water System County on record 524 Purchased groundwater 1 0 No inventory

Cities and towns in Alameda County

20 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