Drinking water quality · 2025
· Verified
What's in Ucmr5 — Charleston Water System (sc1010001) (2025), SC tap water
0 contaminants were measured in the Ucmr5 — Charleston Water System (sc1010001) (2025), SC water system's 2025 annual report. Each is shown below against its federal limit.
- Reporting year
- 2025
- Contaminants measured
- 0
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- SC
PFAS — EPA UCMR5 (2023–2025)
2 PFAS compounds above EPA limits in Ucmr5 — Charleston Water System (sc1010001) (2025), SC
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFOS (Perfluorooctane sulfonic acid)
● Over EPA limit (1.6×)PFOA (Perfluorooctanoic acid)
● Over EPA limit (1.1×)PFHxA
● Detected (no federal limit)PFPeA
● Detected (no federal limit)PFBS
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Ucmr5 — Charleston Water System (sc1010001) (2025), SC's drinking water comes from surface water, drawn from 2 sources.
Source
- BUSHY PARK RESERVOIR
- EDISTO RIVER
Treatment
- HANAHAN WATER TREATMENT (A10001)
Distribution
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based5 violations on record · most recent Jul 1984resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
People also ask about Ucmr5 — Charleston Water System (sc1010001) (2025), SC's water
+Is Ucmr5 — Charleston Water System (sc1010001) (2025), SC tap water safe to drink in 2025?
Every one of the 0 contaminants measured in Ucmr5 — Charleston Water System (sc1010001) (2025), SC's 2025 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Ucmr5 — Charleston Water System (sc1010001) (2025), SC tap water?
0 contaminants were measured in Ucmr5 — Charleston Water System (sc1010001) (2025), SC's 2025 Consumer Confidence Report. 0 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Ucmr5 — Charleston Water System (sc1010001) (2025), SC's 2025 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Ucmr5 — Charleston Water System (sc1010001) (2025), SC's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2025 report; a new report will replace it once the utility publishes its next annual update.