Arsenic in South Carolina Well Water

EPA Data 2025 · Risk Level: Moderate

Avg Level

2.26 ppb

EPA Limit

10 ppb

% Above Limit

13.9%

Risk Level

moderate

Live DataLast updated: April 4, 2026·Source: EPA SDWIS & USGS

Water Quality Details

Contaminant	Arsenic
Category	chemical
Average Level	2.26 ppb
Maximum Level	5.93 ppb
EPA Limit (MCL)	10 ppb
% Wells Above Limit	13.9%
Affected Wells	66,720
Testing Cost	$82
Treatment Cost	$2,148
vs National Avg	-1.983 ppb (-46.7%)

South Carolina Well Water Overview

Well Users

480,000

% on Well Water

17.5%

Quality Score

66/100

Highest Risk States for Arsenic

#1Iowa17.4% above limit #2Georgia15.8% above limit #3Missouri15.8% above limit #4Alabama15.4% above limit #5Colorado14.0% above limit

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EPA SDWIS & USGS

📊

WellWaterPeek Research TeamData Specialists

Our team analyzes data from EPA SDWIS & USGS to deliver accurate, up-to-date information. All data is verified and cross-referenced with official sources.

✓ EPA SDWIS & USGS✓ Updated 2025

Frequently Asked Questions

Is arsenic a problem in South Carolina well water?

In South Carolina, arsenic levels average 2.26 ppb, with a maximum recorded level of 5.93 ppb. The EPA limit is 10 ppb. Currently 13.9% of tested wells exceed this limit, affecting approximately 66,720 wells.

How much does it cost to test for arsenic in South Carolina?

Testing for arsenic in South Carolina typically costs around $82. If treatment is needed, water treatment systems for arsenic cost approximately $2,148.

What is the risk level of arsenic in South Carolina well water?

The risk level for arsenic in South Carolina is rated as moderate. The state average of 2.26 ppb is 46.7% below the national average of 4.243 ppb.

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