Is Greensboro, NC Tap Water Safe to Drink?
Greensboro tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOA: 4.87 ppt, PFOS: 22.73 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water.
Hardness Scale: Where Greensboro Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Greensboro Compares
Greensboro's water is 67% softer than the national average of 138 PPM - ranking in the bottom 72% for hardness nationwide. Most homes here do not need a softener. Within North Carolina, it ranks #7 of 25 cities (12% above the state average of 41 PPM). Among large cities (200k-500k), Greensboro ranks #121 of 165 for hardness.
What Greensboro's Water Means for Your Home
Hardness: 46 PPM - Low Concern
Greensboro's water is slightly hard at 46 PPM. Most households won't notice any issues at this level. Scale buildup is minimal, and a water softener would be overkill. If you're thinking about water treatment, contaminant filtration is where to focus your money, not softening.
Contaminants & Safety
Forever chemicals (PFAS) are a serious concern here. Greensboro has PFOA at 4.87 ppt and PFOS at 22.73 ppt — the EPA's 2024 limit is 4 ppt for PFOA and PFOS individually. PFAS don't break down in your body or the environment. Research links long-term exposure to increased cancer risk, thyroid issues, and immune system problems. The fix: a whole-house activated carbon filter or a point-of-use reverse osmosis system. Look for NSF P473 certification — that's the standard that specifically tests for PFAS removal.
What's in the Treatment Process
Greensboro's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 34.5 ppb (43% of the legal limit, but 230x the EWG guideline) and HAA5 at 21.6 ppb (36% of the legal limit, but 216x the EWG guideline). These are within legal limits, but the EWG sets much tighter thresholds based on cancer-risk research. A whole-house activated carbon filter reduces both chlorine and byproducts.
Chromium-6 was detected at 0.112 ppb, which is 5.6x the EWG health guideline. There's no separate federal limit for chromium-6, only total chromium. A reverse osmosis system is the most effective removal method. All measurements are within federal legal limits. The EWG guidelines represent a more conservative, health-based standard.
| Contaminant | Detected | Health Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Hardness (as CaCO₃) | 46 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 66 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 72.57 ppt | — | No total limit | Detected |
| ↳ PFOA | 4.87 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| ↳ PFOS | 22.73 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| Lead | 2 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 1.2 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | Not reported | 5 mg/L | 10 mg/L | N/A |
Recommended Filter for Greensboro
PFAS exceed EPA limits (PFOA: 4.87 ppt, PFOS: 22.73 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
Quick Fix for Chlorine: Shower Filter
At 1.2 mg/L chlorine, many Greensboro residents notice dry skin, brittle hair, and that "pool smell" in the shower. A shower filter installs in 5 minutes, no tools needed.
How to Test Your Water in Greensboro
With PFAS at 72.57 ppt in Greensboro's supply, confirming your home's specific levels is especially important. PFAS vary by neighborhood and can concentrate differently depending on your position in the distribution system.
Free option: Request Greensboro Water's annual Consumer Confidence Report for official city-level data.
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About Greensboro's Water Supply
Water Utility: Greensboro Water
Water Source: Lake Brandt, Lake Townsend (Surface Water)
Population Served: 319,588
Hardness: 46 PPM (2.7 grains per gallon)
Greensboro's drinking water comes from surface sources — Lake Brandt, Lake Townsend. Surface water requires more extensive treatment than groundwater, including coagulation, filtration, and disinfection. This heavier chlorination is why disinfection byproducts tend to be higher in surface-supplied systems. On the upside, surface sources often deliver softer water than deep aquifers. The system serves 320,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request Greensboro Water's Consumer Confidence Report (CCR) or test your own tap.
ZIP Codes Covered by This Report
This water quality data applies to all areas served by Greensboro Water in Greensboro, NC, including ZIP codes:
27027, 27201, 27202, 27214, 27215, 27216, 27217, 27233, 27244, 27249, 27283, 27289, 27298, 27301, 27310, 27313, 27320, 27323, 27342, 27355, 27357, 27358, 27375, 27377, 27401, 27402, 27403, 27404, 27405, 27406, 27407, 27408, 27409, 27410, 27411, 27412, 27413, 27415, 27416, 27417, 27419, 27420, 27425, 27427, 27429, 27435, 27438, 27455, 27495, 27497, 27498, 27499
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Greensboro to Other North Carolina Cities
Frequently Asked Questions About Greensboro Water
Is Greensboro tap water safe to drink?
Where does Greensboro's water come from?
Do I need a water softener in Greensboro?
How do I remove PFAS from Greensboro tap water?
What water filter is best for Greensboro?
Is Greensboro water safe for babies and infants?
What are disinfection byproducts in Greensboro's water?
Is chromium-6 in Greensboro's water?
Data sources: Lead and copper data from EPA Safe Drinking Water Act LCR reporting. Contaminant data from utility-reported testing results. PFAS data from EPA UCMR5 (2023–2025). Hardness from USGS and municipal reports. Data reflects system-level testing results and may not match your specific tap due to neighborhood plumbing, season, or recent utility changes. For your utility's latest results, request their Consumer Confidence Report (CCR). Our methodology. Last updated: 2026-02-24.
What Greensboro Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 46 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on Greensboro's water data.