About 800,000 South Carolinians rely on private wells[5]. SC requires a test only when your well is first built[6]. After that, testing is your responsibility.
Quick Answer
Test for bacteriaColiform BacteriaA group of bacteria used as indicators of potential contamination. Total coliform presence suggests a pathway for pathogens to enter your well.EPA MCL: 0 (no coliform should be present)Learn more → (contamination indicators) and nitratesNitratesCompounds that enter groundwater from fertilizers, septic systems, and animal waste. Especially dangerous for infants under 6 months (blue baby syndrome).EPA MCL: 10 mg/L (ppm)Learn more → (fertilizer compounds) every year. Also test ironIronA naturally occurring mineral found in groundwater. Iron causes orange/rust staining on fixtures and laundry and gives water a metallic taste.EPA Secondary MCL: 0.3 mg/L (ppm)Learn more → (staining mineral), pH, and hardnessHardness (Calcium Carbonate)The concentration of dissolved calcium and magnesium in water. Hard water causes scale buildup in pipes, water heaters, and fixtures.No EPA standard. Soft: <1 gpg. Moderate: 1-7 gpg. Hard: 7-10.5 gpg. Very Hard: >10.5 gpg.Learn more → (dissolved calcium). In the Piedmont, add radon testing.
Common SC Well Water Issues by Region
| Contaminant | Where in SC | Learn More |
|---|---|---|
| Iron | Statewide, especially Coastal Plain | Iron guide |
| Low pH (acidic) | Piedmont (upstate) | Acidic water guide |
| Hard water | Piedmont, Sandhills | Hard water guide |
| Manganese | Coastal Plain | Manganese guide |
| Bacteria | Statewide (shallow wells) | Bacteria guide |
| Nitrates | Agricultural areas (Pee Dee region) | Nitrates guide |
Have your test results? Get a plain-English diagnosis.
Analyze My Water TestSC Well Water by Region
Upstate / Piedmont (Greenville, Spartanburg, Anderson)
Granite and metamorphic rock. Low pH is the primary concern. Iron and manganese are moderate. Radon from granite bedrock is possible[2].
Midlands / Sandhills (Columbia area)
Sandy soils over clay. Iron is common. Hardness varies. Shallow wells are more vulnerable to bacteria and surface contamination[3].
Lowcountry / Coastal Plain (Charleston to Myrtle Beach)
Deep sedimentary aquifers. Iron and manganese are the primary issues. Some areas have naturally elevated fluoride. Nitrates near agricultural operations[2].
Where to Get Tested in South Carolina
- SC DHEC — arranges testing through regional offices[4].
- Clemson Extension — offers water testing clinics in some counties[3].
- Private certified labs — check SC DHEC for certified lab listings.
- Mail-in services — Tap Score and national services accept SC samples.
What to Do Next
Haven't tested? Contact SC DHEC or your county health department. Budget $30–$100 for a basic panel.
Have results? Use our Water Test Interpreter or read How to Read a Water Test.
Frequently Asked Questions
Does SC require well water testing?
Only at new well construction[6]. No ongoing mandate. Annual bacteria and nitrate testing is recommended.
What contaminants are common in SC?
Iron statewide, low pH in the Piedmont, manganese on the Coastal Plain, nitrates near farms[2].
References
- SC DHEC. "Private Wells and Water Testing." Bureau of Water, 2024. https://scdhec.gov
- U.S. Geological Survey. "Groundwater Quality in South Carolina." NAWQA, 2023. https://www.usgs.gov/mission-areas/water-resources
- Clemson Cooperative Extension. "Private Well Water Testing." 2023.
- SC DHEC. "State Environmental Laboratory: Water Testing Services." 2024.
- U.S. Census Bureau. "Households Using Wells by State." American Housing Survey, 2021.
- SC Code of Regulations. "R.61-71: Well Standards." 2024.