Johnson County, Tennessee — public water systems
At a glance
8 active public water systems are filed under Johnson County, Tennessee in EPA's SDWIS records, together reporting 11,411 people served. The largest is Mountain City Water Dept, which reports serving 9,304 people. 3 are community water systems serving people where they live; the other 5 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
8
Population served
11.4K
Community systems
3
Groundwater share
62.5%
How does Johnson County compare with other Tennessee counties?
Johnson County has the 52nd-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 11,411 people served in total, the 83rd-largest county figure in the state and 0.1% of the statewide total. The average system here reports serving 1,426 people, well below 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 Johnson County's drinking water come from?
By primary water source, Johnson County's active systems draw on groundwater (5, 63%), purchased surface water (2, 25%) and surface water (1, 13%). Overall, 63% rely mainly on groundwater (including purchased groundwater) and 38% 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, Mountain City Water Dept, draws primarily on surface water.
What kinds of water systems operate in Johnson County?
Johnson County's active systems break down as 3 community systems (38%) and 5 transient non-community systems (63%). 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 (63%) and local government (38%).
Water systems in Johnson County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Mountain City Water Dept | Johnson | 9,304 | Community | Surface water |
| 2 | Carderview Utility District | Johnson | 1,049 | Community | Purchased surface water |
| 3 | Brownlow Utility District | Johnson | 683 | Community | Purchased surface water |
| 4 | Pioneer Landing | Johnson | 140 | Transient non-community | Groundwater |
| 5 | Dyson Grove Baptist Church | Johnson | 100 | Transient non-community | Groundwater |
| 6 | Sharpie'S Restaurant | Johnson | 85 | Transient non-community | Groundwater |
| 7 | Dollar General - Shady Valley | Johnson | 25 | Transient non-community | Groundwater |
| 8 | Shady Valley Country Store | Johnson | 25 | Transient non-community | Groundwater |
Johnson County water systems: frequently asked questions
How many public water systems are in Johnson County, Tennessee?
EPA's SDWIS records file 8 active public water systems under Johnson County, Tennessee: 3 community systems (38%) and 5 transient non-community systems (63%).
Who supplies drinking water in Johnson County, TN?
The largest community water systems filed under Johnson County are Mountain City Water Dept (9,304 people served), Carderview Utility District (1,049 people served) and Brownlow Utility District (683 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 Johnson County's drinking water come from groundwater or surface water?
Of the 8 active public water systems in Johnson County, 63% draw mainly on groundwater and 38% on surface water, counting purchased supplies. The largest system, Mountain City Water Dept, uses surface water.
Where can I find a water quality report for Johnson 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. 3 community systems are filed under Johnson 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 Johnson 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 Johnson County, Tennessee”, https://aquacensus.com/water-systems/tennessee/johnson (data as of October 1, 2026).