Tap Truth EPA drinking water records, in plain English

City and town drinking water records

Water systems serving Rosemead, CA

5 community water systems have a mapped service area in Rosemead, CA. Cal/Am Water Company - San Marino covers 30% of the area inside Rosemead's Census boundary and reports serving 47,995 people in all.

1 of them had at least one health-based violation in the last 10 years. None of those systems has one still unresolved.

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

Their lead service line inventories list no lead lines, no galvanized lines that must be replaced and no lines of unknown material.

Community water systems
5
Systems with a health-based violation, last 10 years
1
Systems with one unresolved
0
Lead service lines in inventories
0

Water systems serving Rosemead

5 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 Area People served Main source Health-based violations, 10 years Unresolved Lead lines
Cal/Am Water Company - San Marino Covers 30% of Rosemead 47,995 Purchased surface water 0 0 0
GSWC-South San Gabriel Covers 27% of Rosemead 26,240 Purchased surface water 0 0 0
San Gabriel Valley Water Co.-El Monte Covers 20% of Rosemead 248,000 Groundwater 2 0 0
San Gabriel County WD Covers 10% of Rosemead 39,345 Groundwater 0 0 0
Amarillo Mutual Water Company Mapped area inside Rosemead 3,134 Groundwater 0 0 0

Other cities and towns in Los Angeles County

140 places

Back to Los Angeles County, CA

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