Marion County, South Carolina — public water systems
At a glance
6 active public water systems are filed under Marion County, South Carolina in EPA's SDWIS records, together reporting 34,320 people served. The largest is Marco Rural Water Co (Sc3320001), which reports serving 17,120 people. 4 are community water systems serving people where they live; the other 2 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
34.3K
Community systems
4
Groundwater share
100%
How does Marion County compare with other South Carolina counties?
Marion County has the 45th-most active public water systems among the 58 counties listed for active South Carolina systems in EPA records; among the 46 with 3 or more systems, the median has 18. Its systems report 34,320 people served in total, the 26th-largest county figure in the state and 0.7% of the statewide total. The average system here reports serving 5,720 people, about 63% above the South Carolina average of 3,511. 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 Marion County's drinking water come from?
By primary water source, Marion County's active systems draw on groundwater (4, 67%) and purchased groundwater (2, 33%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 70% and 30% across South Carolina. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Marco Rural Water Co (Sc3320001), draws primarily on groundwater.
What kinds of water systems operate in Marion County?
Marion County's active systems break down as 4 community systems (67%) and 2 transient non-community systems (33%). 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 (67%) and private (33%).
Water systems in Marion County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Marco Rural Water Co (Sc3320001) | Marion | 17,120 | Community | Groundwater |
| 2 | Gsw&Sa-Marion City of (Sc3310001) | Marion | 9,104 | Community | Groundwater |
| 3 | Mullins City of (Sc3310002) | Marion | 7,366 | Community | Groundwater |
| 4 | Gsw&Sa-Nichols Town of (3310003) | Marion | 678 | Community | Groundwater |
| 5 | Primo-Food Lion 1597 (Sc3380001) | Marion | 26 | Transient non-community | Purchased groundwater |
| 6 | Primo-Walmart 1829 (Sc3380002) | Marion | 26 | Transient non-community | Purchased groundwater |
Marion County water systems: frequently asked questions
How many public water systems are in Marion County, South Carolina?
EPA's SDWIS records file 6 active public water systems under Marion County, South Carolina: 4 community systems (67%) and 2 transient non-community systems (33%).
Who supplies drinking water in Marion County, SC?
The largest community water systems filed under Marion County are Marco Rural Water Co (Sc3320001) (17,120 people served), Gsw&Sa-Marion City of (Sc3310001) (9,104 people served) and Mullins City of (Sc3310002) (7,366 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 Marion County's drinking water come from groundwater or surface water?
Of the 6 active public water systems in Marion County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Marco Rural Water Co (Sc3320001), uses groundwater.
Where can I find a water quality report for Marion 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. 4 community systems are filed under Marion 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 Marion 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 South Carolina 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 Marion County, South Carolina”, https://aquacensus.com/water-systems/south-carolina/marion (data as of October 1, 2026).