Cache County, Idaho — public water systems
At a glance
3 active public water systems are filed under Cache County, Idaho in EPA's SDWIS records, together reporting 8,667 people served. The largest is Hyde Park City Water System, which reports serving 5,200 people. 2 are community water systems serving people where they live; the other 1 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
3
Population served
8.7K
Community systems
2
Groundwater share
100%
How does Cache County compare with other Idaho counties?
Cache County has the 47th-most active public water systems among the 64 counties listed for active Idaho systems in EPA records; among the 47 with 3 or more systems, the median has 27. Its systems report 8,667 people served in total, the 28th-largest county figure in the state and 0.5% of the statewide total. The average system here reports serving 2,889 people, about 3.2 times the Idaho average of 899. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Cache County's drinking water come from?
By primary water source, Cache County's active systems draw on groundwater (3, 100%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 96% and 4.1% across Idaho. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Hyde Park City Water System, draws primarily on groundwater.
What kinds of water systems operate in Cache County?
Cache County's active systems break down as 2 community systems (67%) and 1 non-transient non-community systems (33%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. EPA lists their owner types as local government (67%) and private (33%).
Water systems in Cache County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Hyde Park City Water System | Cache | 5,200 | Community | Groundwater |
| 2 | Richmond City Water System | Cache | 2,967 | Community | Groundwater |
| 3 | Pepperidge Farm | Cache | 500 | Non-transient non-community | Groundwater |
Cache County water systems: frequently asked questions
How many public water systems are in Cache County, Idaho?
EPA's SDWIS records file 3 active public water systems under Cache County, Idaho: 2 community systems (67%) and 1 non-transient non-community systems (33%).
Who supplies drinking water in Cache County, ID?
The largest community water systems filed under Cache County are Hyde Park City Water System (5,200 people served) and Richmond City Water System (2,967 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Cache County's drinking water come from groundwater or surface water?
Of the 3 active public water systems in Cache County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Hyde Park City Water System, uses groundwater.
Where can I find a water quality report for Cache County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 2 community systems are filed under Cache County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Cache County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Idaho water systems
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in Cache County, Idaho”, https://aquacensus.com/water-systems/idaho/cache (data as of October 1, 2026).