Benewah County, Idaho — public water systems
At a glance
15 active public water systems are filed under Benewah County, Idaho in EPA's SDWIS records, together reporting 7,060 people served. The largest is City of St Maries, which reports serving 4,173 people. 9 are community water systems serving people where they live; the other 6 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
15
Population served
7.1K
Community systems
9
Groundwater share
86.7%
How does Benewah County compare with other Idaho counties?
Benewah County has the 36th-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 7,060 people served in total, the 31st-largest county figure in the state and 0.4% of the statewide total. The average system here reports serving 471 people, about half of 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 Benewah County's drinking water come from?
By primary water source, Benewah County's active systems draw on groundwater (13, 87%) and surface water (2, 13%). Overall, 87% rely mainly on groundwater (including purchased groundwater) and 13% 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 St Maries, draws primarily on surface water.
What kinds of water systems operate in Benewah County?
Benewah County's active systems break down as 9 community systems (60%) and 6 transient non-community systems (40%). 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 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 local government (40%), private (33%), state government (20%) and public/private partnership (6.7%).
Water systems in Benewah County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | St Maries City of | Benewah | 4,173 | Community | Surface water |
| 2 | Plummer City of | Benewah | 1,034 | Community | Groundwater |
| 3 | Fernwood Water Dist | Benewah | 514 | Community | Surface water |
| 4 | Idpr Heyburn Sp Chatcolet Cg | Benewah | 400 | Transient non-community | Groundwater |
| 5 | Santa Water and Sewer Dist | Benewah | 160 | Community | Groundwater |
| 6 | Cottonwood Point Water Assn | Benewah | 151 | Community | Groundwater |
| 7 | Tensed City of | Benewah | 146 | Community | Groundwater |
| 8 | Emida Water and Sewer Association | Benewah | 120 | Community | Groundwater |
| 9 | Idpr Heyburn Sp Benewah Cg | Benewah | 100 | Transient non-community | Groundwater |
| 10 | Evergreen Terrace Water Association | Benewah | 85 | Community | Groundwater |
| 11 | Cassandra Hills Owners Assn | Benewah | 57 | Community | Groundwater |
| 12 | Idpr Mission Mountain Water System | Benewah | 45 | Transient non-community | Groundwater |
| 13 | Cherry Creek Trailer Park | Benewah | 25 | Transient non-community | Groundwater |
| 14 | Soaring Hawk Rv Park | Benewah | 25 | Transient non-community | Groundwater |
| 15 | St Joe Landing | Benewah | 25 | Transient non-community | Groundwater |
Benewah County water systems: frequently asked questions
How many public water systems are in Benewah County, Idaho?
EPA's SDWIS records file 15 active public water systems under Benewah County, Idaho: 9 community systems (60%) and 6 transient non-community systems (40%).
Who supplies drinking water in Benewah County, ID?
The largest community water systems filed under Benewah County are City of St Maries (4,173 people served), City of Plummer (1,034 people served) and Fernwood Water Dist (514 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 Benewah County's drinking water come from groundwater or surface water?
Of the 15 active public water systems in Benewah County, 87% draw mainly on groundwater and 13% on surface water, counting purchased supplies. The largest system, City of St Maries, uses surface water.
Where can I find a water quality report for Benewah 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. 9 community systems are filed under Benewah 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 Benewah 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 Benewah County, Idaho”, https://aquacensus.com/water-systems/idaho/benewah (data as of October 1, 2026).