Is Edison, NJ Tap Water Safe to Drink?
Edison tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOA: 4.9 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water.
Hardness Scale: Where Edison Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Edison Compares
Edison's water is 60% softer than the national average of 138 PPM - ranking in the bottom 68% for hardness nationwide. Most homes here do not need a softener. Within New Jersey, it ranks #6 of 22 cities (22% above the state average of 45 PPM). Among smaller cities, Edison ranks #159 of 288 for hardness.
What Edison's Water Means for Your Home
Hardness: 55 PPM - Low Concern
Edison's water is slightly hard at 55 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 worth watching here. Edison has PFOA at 4.9 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
Edison's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 25.7 ppb (32% of the legal limit, but 171x the EWG guideline) and HAA5 at 26.3 ppb (44% of the legal limit, but 263x 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 0.111 ppb, which is 5.5x 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) | 55 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 66 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 18.2 ppt | — | No total limit | Detected |
| ↳ PFOA | 4.9 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 1.6 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 0.8 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 Edison
PFAS exceed EPA limits (PFOA: 4.9 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
How to Test Your Water in Edison
With PFAS at 18.2 ppt in Edison'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 Middlesex Water Company's annual Consumer Confidence Report for official city-level data.
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About Edison's Water Supply
Water Utility: Middlesex Water Company
Water Source: Raritan River & local wells (Surface Water)
Population Served: 35,000
Hardness: 55 PPM (3.2 grains per gallon)
Edison's drinking water comes from surface sources — Raritan River & local wells. 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 35,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request Middlesex Water Company'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 Middlesex Water Company in Edison, NJ, including ZIP codes:
08817, 08818, 08820, 08837, 08840, 08872, 08899
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Edison to Other New Jersey Cities
Frequently Asked Questions About Edison Water
Is Edison tap water safe to drink?
Where does Edison's water come from?
Do I need a water softener in Edison?
How do I remove PFAS from Edison tap water?
What water filter is best for Edison?
Is Edison water safe for babies and infants?
What are disinfection byproducts in Edison's water?
Is chromium-6 in Edison'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 Edison Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 55 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on Edison's water data.