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Jerome County, Idaho — public water systems

At a glance

26 active public water systems are filed under Jerome County, Idaho in EPA's SDWIS records, together reporting 17,835 people served. The largest is City of Jerome, which reports serving 13,135 people. 6 are community water systems serving people where they live; the other 20 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

26

Population served

17.8K

Community systems

6

Groundwater share

100%

How does Jerome County compare with other Idaho counties?

Jerome County has the 27th-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 17,835 people served in total, the 17th-largest county figure in the state and 1% of the statewide total. The average system here reports serving 686 people, about 24% below 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 Jerome County's drinking water come from?

By primary water source, Jerome County's active systems draw on groundwater (26, 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, City of Jerome, draws primarily on groundwater.

What kinds of water systems operate in Jerome County?

Jerome County's active systems break down as 6 community systems (23%), 8 non-transient non-community systems (31%) and 12 transient non-community systems (46%). 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. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (73%), local government (19%), state government (3.8%) and federal government (3.8%).

Water systems in Jerome County

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Active public water systems in Jerome County, Idaho
#Water systemCountyPopulation servedTypeSource
1Jerome City ofJerome13,135CommunityGroundwater
2Hazelton City ofJerome899CommunityGroundwater
3Valley SchoolJerome640Non-transient non-communityGroundwater
4True West BeefJerome490Non-transient non-communityGroundwater
5Eden City ofJerome411CommunityGroundwater
6Jerome Cheese CompanyJerome400Non-transient non-communityGroundwater
7Unit 3 Water AssnJerome350CommunityGroundwater
8Crossroads of IdahoJerome300Non-transient non-communityGroundwater
9Jerome Country ClubJerome225Transient non-communityGroundwater
10North Rim FairwaysJerome150CommunityGroundwater
11Country Club EstatesJerome137CommunityGroundwater
12Snake River Elks #2807Jerome75Transient non-communityGroundwater
13Nps Minidoka Historical SiteJerome75Transient non-communityGroundwater
14Travelers OasisJerome75Non-transient non-communityGroundwater
15Intermountain Office Warehouse ComplexJerome71Non-transient non-communityGroundwater
16Koa Campgrounds JeromeJerome65Transient non-communityGroundwater
17Anderson CampJerome50Transient non-communityGroundwater
18Mountain View BarnJerome50Transient non-communityGroundwater
19Blue Lakes Country ClubJerome40Transient non-communityGroundwater
20Idfg - Mv Regional OfficeJerome33Non-transient non-communityGroundwater
21Christinas DaycareJerome32Non-transient non-communityGroundwater
22Monastery of the AscensionJerome32Transient non-communityGroundwater
23Mi Pueblo Bakery & TaqueriaJerome25Transient non-communityGroundwater
24Elk Ridge Rv ParkJerome25Transient non-communityGroundwater
25Producers Livestock MarketingJerome25Transient non-communityGroundwater
26Northridge FellowshipJerome25Transient non-communityGroundwater

Jerome County water systems: frequently asked questions

How many public water systems are in Jerome County, Idaho?

EPA's SDWIS records file 26 active public water systems under Jerome County, Idaho: 6 community systems (23%), 8 non-transient non-community systems (31%) and 12 transient non-community systems (46%).

Who supplies drinking water in Jerome County, ID?

The largest community water systems filed under Jerome County are City of Jerome (13,135 people served), City of Hazelton (899 people served) and City of Eden (411 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 Jerome County's drinking water come from groundwater or surface water?

Of the 26 active public water systems in Jerome County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, City of Jerome, uses groundwater.

Where can I find a water quality report for Jerome 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. 6 community systems are filed under Jerome 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 Jerome 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 Jerome County, Idaho”, https://aquacensus.com/water-systems/idaho/jerome (data as of October 1, 2026).