Is Durham South, NC Tap Water Safe to Drink?
Durham South tap water is legally compliant, but 2 contaminants exceed health guidelines. Specifically: PFAS above EPA limits (PFOA: 4.1 ppt, PFOS: 5.34 ppt — limit is 4 ppt each); lead at 14 ppb (above the upcoming 10 ppb standard, effective 2027). A point-of-use filter is recommended for drinking and cooking water.
Hardness Scale: Where Durham South Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Durham South Compares
Durham South's water is 78% softer than the national average of 138 PPM - ranking in the bottom 83% for hardness nationwide. Most homes here do not need a softener. Within North Carolina, it ranks #21 of 25 cities (27% below the state average of 41 PPM). Among large cities (200k-500k), Durham South ranks #143 of 165 for hardness.
What Durham South's Water Means for Your Home
Hardness: 30 PPM - Low Concern
Durham South's water is slightly hard at 30 PPM. Most households won't notice any issues at this level. Scale buildup is minimal, and a water softener would be overkill. Durham South is softer than 83% of US cities. If you're thinking about water treatment, contaminant filtration is where to focus your money, not softening.
Contaminants & Safety
Lead is the main concern here. At 14 ppb, Durham South's average is well above the health guideline of zero — there is no safe level of lead, especially for children. Lead typically enters your water from old pipes, not the source itself. Quick fix: run cold water for 30 seconds before drinking. Better fix: a certified lead-reduction filter (NSF/ANSI Standard 53) at your kitchen faucet. If your home was built before 1986, testing is strongly recommended.
What's in the Treatment Process
Durham South's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 37.1 ppb (46% of the legal limit, but 247x the EWG guideline) and HAA5 at 28 ppb (47% of the legal limit, but 280x 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. 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) | 30 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 55 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 20.33 ppt | — | No total limit | Detected |
| ↳ PFOA | 4.1 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| ↳ PFOS | 5.34 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| Lead | 14 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ⚠ Elevated |
| Chlorine / Chloramine | 1.4 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | Not reported | 5 mg/L | 10 mg/L | N/A |
Recommendations for Durham South Homes
Recommended Filter for Durham South
PFAS exceed EPA limits (PFOA: 4.1 ppt, PFOS: 5.34 ppt — limit: 4 ppt each). Lead at 14 ppb exceeds the upcoming 10 ppb action level (effective 2027). A certified filter reduces these contaminants effectively.
Quick Fix for Chlorine: Shower Filter
At 1.4 mg/L chlorine, many Durham South 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 Durham South
With PFAS at 20.33 ppt in Durham South'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 City of Durham Water's annual Consumer Confidence Report for official city-level data.
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About Durham South's Water Supply
Water Utility: City of Durham Water
Water Source: Lake Michie + Little River (Surface Water)
Population Served: 322,083
Hardness: 30 PPM (1.8 grains per gallon)
Durham South's drinking water comes from surface sources — Lake Michie + Little River. 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 322,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Durham 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 City of Durham Water in Durham South, NC, including ZIP codes:
27713
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Durham South to Other North Carolina Cities
Frequently Asked Questions About Durham South Water
Is Durham South tap water safe to drink?
Where does Durham South's water come from?
Do I need a water softener in Durham South?
How do I remove PFAS from Durham South tap water?
What water filter is best for Durham South?
Is Durham South water safe for babies and infants?
What are disinfection byproducts in Durham South's water?
Why does Durham South water taste like chlorine?
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 Durham South Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 30 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on Durham South's water data.