Jefferson, SC Water Safety: 99/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Drinking water tracked for Jefferson by SC authorities posts above-average scores — the majority of systems are free from health-based exceedances and the city's grade sits above the state median.
How Jefferson Compares
Data: EPA SDWIS Last verified: 2026-06-03
Jefferson Water: The Quick Version
- Average lead level: 0.0046 mg/L.
- Homes built before 1986: 45% — older plumbing may contain lead solder.
- CDC health risk index: 16.41 — above typical levels.
Water Systems Serving Jefferson
Residential addresses in Jefferson, SC are served by 2 primary water providers out of 2 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 1 ZIP code in Jefferson, South Carolina, covering 2 community water systems serving approximately 4,049 people.
No EPA violations recorded across any ZIP codes in Jefferson — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Jefferson: A (99/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Jefferson water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0046 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 29718 | A | Pageland City of (sc1310003) | 3,467 |
All ZIP Codes in Jefferson
- 29718 [A]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
CDC Health Data for Jefferson
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
How Old Is Jefferson's Housing Stock?
With 45% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Some cities skew heavily toward one construction era; Jefferson does not. The median build year of 1999 reflects a housing stock where older and newer homes share the market in meaningful proportions. That mixed profile means the city carries moderate aggregate plumbing-era risk — with older homes, particularly those built before 1986, representing the portion of the stock where lead-soldered joints may still be present.
Most homes in Jefferson were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Protecting Children from Lead in Jefferson
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Practically, the structural drivers in Jefferson — 45% pre-rule stock and citywide monitoring at or beyond the regulatory benchmark — make an in-home draw the practical way to translate aggregate averages into the specific conditions at one address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Jefferson, SC