City and town drinking water records

Water systems serving Colusa, CA

2 community water systems have a mapped service area in Colusa, CA. City of Colusa covers 32% of the area inside Colusa's Census boundary and reports serving 6,447 people in all.

None of them had a health-based violation in the last 10 years.

1 relies mainly on groundwater and 1 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.

1 more system lists a mailing address in Colusa but has no service area map, so it is listed apart and not counted here.

Community water systems: 2
Systems with a health-based violation, last 10 years: 0
Systems with one unresolved: 0
Lead service lines in inventories: 0

Water systems serving Colusa

2 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
City of Colusa	Covers 32% of Colusa	6,447	Groundwater	0	0	0
Colusa Co. Service Area #1-Century Ranch	Mapped area inside Colusa	246	Surface water	0	0	0

Systems with a mailing address in Colusa

1 system

EPA has no service area map for this system, and a mailing address is often an office away from the area served, so it is not counted in the figures above.

System	Area	People served	Main source	Health-based violations, 10 years	Unresolved	Lead lines
Colusa Northern System	Mailing address only	67	Groundwater	0	0	0

Other cities and towns in Colusa County

7 places

Back to Colusa 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