Benton County, Oregon — public water systems
At a glance
51 active public water systems are filed under Benton County, Oregon in EPA's SDWIS records, together reporting 72,904 people served. The largest is City of Corvallis, which reports serving 61,468 people. 15 are community water systems serving people where they live; the other 36 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
51
Population served
72.9K
Community systems
15
Groundwater share
92.2%
How does Benton County compare with other Oregon counties?
Benton County has the 17th-most active public water systems among the 57 counties listed for active Oregon systems in EPA records; among the 38 with 3 or more systems, the median has 41. Its systems report 72,904 people served in total, the 11th-largest county figure in the state and 1.8% of the statewide total. The average system here reports serving 1,430 people, roughly in line with the Oregon average of 1,587. 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 Benton County's drinking water come from?
By primary water source, Benton County's active systems draw on groundwater (47, 92%) and surface water (4, 7.8%). Overall, 92% rely mainly on groundwater (including purchased groundwater) and 7.8% on surface water, compared with 88% and 12% across Oregon. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, City of Corvallis, draws primarily on surface water.
What kinds of water systems operate in Benton County?
Benton County's active systems break down as 15 community systems (29%), 15 non-transient non-community systems (29%) and 21 transient non-community systems (41%). 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 (57%), local government (33%), federal government (5.9%) and public/private partnership (3.9%).
The 50 largest water systems in Benton County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Corvallis, City of | Benton | 61,468 | Community | Surface water |
| 2 | Philomath Public Works | Benton | 4,670 | Community | Surface water |
| 3 | Adair Village Water System | Benton | 875 | Community | Surface water |
| 4 | Monroe, City of | Benton | 723 | Community | Surface water |
| 5 | Knoll Terrace Park | Benton | 452 | Community | Groundwater |
| 6 | Vineyard Mountain Water | Benton | 325 | Community | Groundwater |
| 7 | Lineage Logistics | Benton | 290 | Non-transient non-community | Groundwater |
| 8 | Mt View Elementary Sd 509j | Benton | 250 | Non-transient non-community | Groundwater |
| 9 | Plymouth Day Use | Benton | 242 | Transient non-community | Groundwater |
| 10 | Kings Valley Charter School | Benton | 215 | Non-transient non-community | Groundwater |
| 11 | Blodgett Country Store | Benton | 210 | Transient non-community | Groundwater |
| 12 | Alsea County Service District | Benton | 202 | Community | Groundwater |
| 13 | Childrens Farm Home Campus | Benton | 200 | Non-transient non-community | Groundwater |
| 14 | Stahlbush Island Farms | Benton | 200 | Non-transient non-community | Groundwater |
| 15 | Corvallis Waldorf Association | Benton | 180 | Non-transient non-community | Groundwater |
| 16 | Calvary Corvallis | Benton | 173 | Non-transient non-community | Groundwater |
| 17 | Fir View Water Company | Benton | 150 | Community | Groundwater |
| 18 | Muddy Creek Charter School | Benton | 125 | Non-transient non-community | Groundwater |
| 19 | Columbia Place LLC | Benton | 125 | Community | Groundwater |
| 20 | Cascade View Estates | Benton | 113 | Community | Groundwater |
| 21 | Plymouth Campground | Benton | 104 | Transient non-community | Groundwater |
| 22 | City Limits | Benton | 100 | Transient non-community | Groundwater |
| 23 | Suburban Christian Church | Benton | 100 | Non-transient non-community | Groundwater |
| 24 | Pub, the | Benton | 100 | Transient non-community | Groundwater |
| 25 | North Corvallis MHP-Well #1 | Benton | 100 | Community | Groundwater |
| 26 | Ridgewood Dist Improv Co | Benton | 90 | Community | Groundwater |
| 27 | Garland Nursery | Benton | 90 | Transient non-community | Groundwater |
| 28 | Pioneer Village Water Company | Benton | 80 | Community | Groundwater |
| 29 | Blm Alsea Falls Camping | Benton | 75 | Transient non-community | Groundwater |
| 30 | Consumers Power Inc. | Benton | 60 | Non-transient non-community | Groundwater |
| 31 | Philomath Scout Lodge | Benton | 60 | Transient non-community | Groundwater |
| 32 | Beazell Memorial Forest | Benton | 54 | Transient non-community | Groundwater |
| 33 | Student Transportation of America | Benton | 53 | Non-transient non-community | Groundwater |
| 34 | Hull-Oakes Lumber Company | Benton | 51 | Non-transient non-community | Groundwater |
| 35 | Gathering Together Farms | Benton | 50 | Transient non-community | Groundwater |
| 36 | Raintree Estates | Benton | 50 | Community | Groundwater |
| 37 | Little Beavers Preschool #1 | Benton | 50 | Non-transient non-community | Groundwater |
| 38 | Benton Co Pks Salmonberry Cg | Benton | 43 | Transient non-community | Groundwater |
| 39 | Bellfountain Country Store | Benton | 40 | Transient non-community | Groundwater |
| 40 | Jackson Creek Water Association | Benton | 39 | Community | Groundwater |
| 41 | Tennis West Racquet Club | Benton | 39 | Transient non-community | Groundwater |
| 42 | Blodgett Elementary Sd 17j | Benton | 35 | Non-transient non-community | Groundwater |
| 43 | Bellfountain Community Church | Benton | 32 | Transient non-community | Groundwater |
| 44 | Patrick Lumber Company | Benton | 32 | Non-transient non-community | Groundwater |
| 45 | Life Community Church | Benton | 30 | Transient non-community | Groundwater |
| 46 | Alpine Tavern | Benton | 30 | Transient non-community | Groundwater |
| 47 | Camp Alpine Church of LDS | Benton | 28 | Transient non-community | Groundwater |
| 48 | Benton Co Pks Bellfountain Pk | Benton | 26 | Transient non-community | Groundwater |
| 49 | G3 Sports and Fitness | Benton | 25 | Transient non-community | Groundwater |
| 50 | Tunnel Radio of America | Benton | 25 | Transient non-community | Groundwater |
All other water systems in Benton County (1)
The remaining active systems filed under Benton County, largest first, with the population each reports serving.
Benton County water systems: frequently asked questions
How many public water systems are in Benton County, Oregon?
EPA's SDWIS records file 51 active public water systems under Benton County, Oregon: 15 community systems (29%), 15 non-transient non-community systems (29%) and 21 transient non-community systems (41%).
Who supplies drinking water in Benton County, OR?
The largest community water systems filed under Benton County are City of Corvallis (61,468 people served), Philomath Public Works (4,670 people served) and Adair Village Water System (875 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 Benton County's drinking water come from groundwater or surface water?
Of the 51 active public water systems in Benton County, 92% draw mainly on groundwater and 7.8% on surface water, counting purchased supplies. The largest system, City of Corvallis, uses surface water.
Where can I find a water quality report for Benton 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. 15 community systems are filed under Benton 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 Benton 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 Oregon water systems
- All Oregon public water systems· 2,536 active
- Tillamook County· 63 systems
- Multnomah County· 58 systems
- Columbia County· 57 systems
- Lincoln County· 52 systems
- Coos County· 45 systems
- Wasco County· 44 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
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 Benton County, Oregon”, https://aquacensus.com/water-systems/oregon/benton (data as of October 1, 2026).