Public water system · SC1020002
ActiveSt John'S Water (Sc1020002)
At a glance
St John'S Water (Sc1020002) (PWSID SC1020002) is an active community water system in Charleston County, South Carolina. It reports serving 22,592 people through 9,933 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in September 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
22,592
Service connections
9,933
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does St John'S Water (Sc1020002) compare with other water systems in Charleston County?
By EPA's size categories, St John'S Water (Sc1020002) is a large system (10,001 to 100,000 people). Charleston County has 72 active public water systems, and St John'S Water (Sc1020002) is the 3rd-largest of them by population served. Its population served is about 3.4 times the county average of 6,667 people per system, and accounts for 4.7% of the 480,015 people reported by systems filed under the county. Across South Carolina, the 1,392 active systems average 3,511 people each. Nationally, the average active community water system reports serving 6,703 people, so St John'S Water (Sc1020002) is about 3.4 times that figure.
What does “community water system” mean?
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. South Carolina has 567 active community water systems, 41% of the state's 1,392 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 368 South Carolina systems (26%) list purchased surface water as their primary source.
Who owns and regulates St John'S Water (Sc1020002)?
EPA lists St John'S Water (Sc1020002) as privately owned. The SC state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 52 of the 72 active systems in Charleston County (72%) are also privately owned.
Does St John'S Water (Sc1020002) have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in September 2015. The violations listed here began between August 1991 and September 2015. By type: 5 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 3 as resolved and 3 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2015-09-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1992-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1992-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 6 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
St John'S Water (Sc1020002): frequently asked questions
Who runs St John'S Water (Sc1020002)?
St John'S Water (Sc1020002) (PWSID SC1020002) is a community water system privately owned. It is regulated by the SC state drinking water program.
How many people does St John'S Water (Sc1020002) serve?
St John'S Water (Sc1020002) reports serving 22,592 people through 9,933 service connections in Charleston County, South Carolina.
Where does St John'S Water (Sc1020002) get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does St John'S Water (Sc1020002) have any drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in September 2015. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is St John'S Water (Sc1020002)'s water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in September 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the SC state drinking water program.
Where can I find St John'S Water (Sc1020002)'s water quality report?
As a community water system, St John'S Water (Sc1020002) must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Charleston County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Charleston Water System (Sc1010001) | Charleston | 327,422 | Community | Surface water |
| Mt Pleasant Water Works (1010002) | Charleston | 91,500 | Community | Purchased surface water |
| Kiawah Island Utility (Sc1010008) | Charleston | 9,550 | Community | Purchased surface water |
| Isle of Palms W/S Comm (Sc1010004) | Charleston | 9,530 | Community | Purchased surface water |
| Seabrook Island Town of (1010009) | Charleston | 5,939 | Community | Purchased surface water |
| Folly Beach City of (1010005) | Charleston | 5,086 | Community | Purchased surface water |
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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, “St John'S Water (Sc1020002), PWSID SC1020002, South Carolina”, https://aquacensus.com/water-systems/south-carolina/st-john-s-water-sc1020002-sc1020002 (data as of October 1, 2026).