Is Raleigh South, NC Tap Water Safe to Drink?
Raleigh South tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOS: 5.45 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water.
Hardness Scale: Where Raleigh South Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Raleigh South Compares
Raleigh South's water is 75% softer than the national average of 138 PPM - ranking in the bottom 80% for hardness nationwide. Most homes here do not need a softener. Within North Carolina, it ranks #18 of 25 cities (15% below the state average of 41 PPM). Among major US cities (500k+), Raleigh South ranks #84 of 100 for hardness.
What Raleigh South's Water Means for Your Home
Hardness: 35 PPM - Low Concern
Raleigh South's water is slightly hard at 35 PPM. Most households won't notice any issues at this level. Scale buildup is minimal, and a water softener would be overkill. Raleigh South is softer than 80% of US cities. If you're thinking about water treatment, contaminant filtration is where to focus your money, not softening.
Contaminants & Safety
Forever chemicals (PFAS) are worth watching here. Raleigh South has PFOS at 5.45 ppt, exceeding the EPA's 2024 limit of 4 ppt per compound. PFAS are synthetic compounds that accumulate in your body over time. A certified carbon filter or reverse osmosis system with NSF P473 certification is the most effective protection. See the regulatory timeline.
What's in the Treatment Process
Raleigh South's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 21.7 ppb (27% of the legal limit, but 145x the EWG guideline) and HAA5 at 15.7 ppb (26% of the legal limit, but 157x 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 0.056 ppb, which is 2.8x 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) | 35 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 65 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 23.52 ppt | — | No total limit | Detected |
| ↳ PFOA | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| ↳ PFOS | 5.45 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| Lead | 3 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| 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 |
Recommended Filter for Raleigh South
PFAS exceed EPA limits (PFOS: 5.45 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
See all filter recommendations for Raleigh SouthQuick Fix for Chlorine: Shower Filter
At 1.4 mg/L chlorine, many Raleigh 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 Raleigh South
With PFAS at 23.52 ppt in Raleigh 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 Raleigh Water's annual Consumer Confidence Report for official city-level data.
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About Raleigh South's Water Supply
Water Utility: City of Raleigh Water
Water Source: Falls Lake (Surface Water)
Population Served: 640,000
Hardness: 35 PPM (2 grains per gallon)
Raleigh South's drinking water comes from surface sources — Falls Lake. 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 640,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Raleigh 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 Raleigh Water in Raleigh South, NC, including ZIP codes:
27501, 27504, 27506, 27520, 27521, 27524, 27527, 27528, 27529, 27530, 27531, 27532, 27533, 27534, 27542, 27555, 27568, 27569, 27576, 27577, 27592, 27593, 27830, 27863, 28333
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Raleigh South to Other North Carolina Cities
Frequently Asked Questions About Raleigh South Water
Is Raleigh South tap water safe to drink?
Where does Raleigh South's water come from?
Do I need a water softener in Raleigh South?
How do I remove PFAS from Raleigh South tap water?
What water filter is best for Raleigh South?
Is Raleigh South water safe for babies and infants?
What are disinfection byproducts in Raleigh South's water?
Is chromium-6 in Raleigh South'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 Raleigh South Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 35 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on Raleigh South's water data.