Washington County, Tennessee — public water systems
At a glance
6 active public water systems are filed under Washington County, Tennessee in EPA's SDWIS records, together reporting 138,483 people served. The largest is Johnson City Water Dept, which reports serving 105,057 people. 2 are community water systems serving people where they live; the other 4 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
6
Population served
138.5K
Community systems
2
Groundwater share
66.7%
How does Washington County compare with other Tennessee counties?
Washington County has the 69th-most active public water systems among the 323 counties listed for active Tennessee systems in EPA records; among the 152 with 3 or more systems, the median has 6. Its systems report 138,483 people served in total, the 13th-largest county figure in the state and 1.7% of the statewide total. The average system here reports serving 23,081 people, about 4 times the Tennessee average of 5,780. 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 Washington County's drinking water come from?
By primary water source, Washington County's active systems draw on groundwater (3, 50%), surface water (2, 33%) and groundwater under influence of surface water (1, 17%). Overall, 67% rely mainly on groundwater (including purchased groundwater) and 33% on surface water, compared with 80% and 20% across Tennessee. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Johnson City Water Dept, draws primarily on surface water.
What kinds of water systems operate in Washington County?
Washington County's active systems break down as 2 community systems (33%) and 4 transient non-community systems (67%). 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 private (67%) and local government (33%).
Water systems in Washington County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Johnson City Water Dept | Washington | 105,057 | Community | Surface water |
| 2 | Jonesborough Water Dept | Washington | 33,069 | Community | Surface water |
| 3 | Dollar General #21089 | Washington | 257 | Transient non-community | Groundwater under influence of surface water |
| 4 | Dollar General #19381 Richwoods | Washington | 50 | Transient non-community | Groundwater |
| 5 | Dollar General #15600 Washington County | Washington | 25 | Transient non-community | Groundwater |
| 6 | Dollar General #22907 Old Mines | Washington | 25 | Transient non-community | Groundwater |
Washington County water systems: frequently asked questions
How many public water systems are in Washington County, Tennessee?
EPA's SDWIS records file 6 active public water systems under Washington County, Tennessee: 2 community systems (33%) and 4 transient non-community systems (67%).
Who supplies drinking water in Washington County, TN?
The largest community water systems filed under Washington County are Johnson City Water Dept (105,057 people served) and Jonesborough Water Dept (33,069 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 Washington County's drinking water come from groundwater or surface water?
Of the 6 active public water systems in Washington County, 67% draw mainly on groundwater and 33% on surface water, counting purchased supplies. The largest system, Johnson City Water Dept, uses surface water.
Where can I find a water quality report for Washington 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 Washington 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 Washington 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 Tennessee 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 Washington County, Tennessee”, https://aquacensus.com/water-systems/tennessee/washington (data as of October 1, 2026).