Over 1.7 million Virginians depend on private wells[5]. Virginia requires testing at construction and often at property sale[6]. But ongoing testing is up to you.
Quick Answer
Test 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) yearly. Add 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, 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), and manganeseManganeseA mineral that causes black or brown staining and can affect the taste of water. Often found alongside iron in well water.EPA Secondary MCL: 0.05 mg/L (ppm). EPA Health Advisory: 0.3 mg/LLearn more → (black staining mineral) every 3 years. In the Piedmont, test for arsenicArsenicA toxic element found naturally in bedrock that dissolves into groundwater. Odorless and tasteless, making testing the only way to detect it.EPA MCL: 10 ppb (0.01 mg/L)Learn more → (toxic bedrock element).
Common VA Contaminants by Region
| Contaminant | Where in VA | Learn More |
|---|---|---|
| Hard water | Valley / Shenandoah (limestone) | Hard water guide |
| Iron | Statewide | Iron guide |
| Low pH | Blue Ridge, parts of Piedmont | Acidic water guide |
| Manganese | Piedmont | Manganese guide |
| Arsenic | Northern Piedmont (localized) | Arsenic guide |
| Bacteria | Statewide (shallow wells, karst) | Bacteria guide |
| Nitrates | Valley and Coastal Plain (farms) | Nitrates guide |
Have your test results? Get a plain-English diagnosis.
Analyze My Water TestVA Well Water by Region
Blue Ridge / Mountains
Granite and metamorphic rock. Low pH is the primary issue. Iron and manganese are moderate[2].
Valley / Shenandoah
Limestone geology makes this the hardest water in Virginia. Karst terrain creates sinkholes that can introduce bacteria into wells. Nitrates from agriculture[4].
Piedmont (Central VA — Richmond, Charlottesville)
Mixed geology. Iron and manganese. Some areas have naturally elevated arsenic. Low pH in areas with granitic rock[2].
Coastal Plain (Tidewater / Hampton Roads)
Deep sedimentary aquifers. Iron is common. Water is generally softer. Nitrates near agricultural areas[3].
Where to Get Tested in Virginia
- Virginia Tech Household Water Quality Program — offers water testing clinics statewide through Virginia Cooperative Extension[3].
- Local health departments — most can arrange bacteria testing.
- Private certified labs — check VDH for certified lab listings.
- Mail-in services — Tap Score and national services accept VA samples.
What to Do Next
Haven't tested? Contact your local Virginia Cooperative Extension office or health department.
Have results? Use our Water Test Interpreter for a personalized plan.
Frequently Asked Questions
Does VA require testing?
At new construction and often at property sale[6]. No ongoing mandate. Annual bacteria/nitrate testing recommended.
What contaminants are common in VA?
Very hard water in the Valley, iron statewide, low pH in the mountains, arsenic in parts of the Piedmont[2].
References
- Virginia Department of Health. "Private Well Water Program." 2024. https://www.vdh.virginia.gov
- U.S. Geological Survey. "Groundwater Quality in Virginia." NAWQA, 2023. https://www.usgs.gov/mission-areas/water-resources
- Virginia Cooperative Extension. "Virginia Household Water Quality Program." Virginia Tech, 2023.
- Virginia DEQ. "Groundwater Resources." Division of Water Supply, 2024. https://www.deq.virginia.gov
- U.S. Census Bureau. "Households Using Wells by State." 2021.
- Virginia Private Well Regulations. "12 VAC 5-630." 2024.