Is Anchorage, AK Tap Water Safe to Drink?
Anchorage tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOA: 9.1 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water.
Hardness Scale: Where Anchorage Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Anchorage Compares
Anchorage's water is 75% softer than the national average of 138 PPM - ranking in the bottom 78% for hardness nationwide. Most homes here do not need a softener. Within Alaska, Anchorage has the hardest water out of 8 cities - 75% above the state average of 20 PPM. Among large cities (200k-500k), Anchorage ranks #133 of 165 for hardness.
What Anchorage's Water Means for Your Home
Hardness: 35 PPM - Low Concern
Anchorage'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. Anchorage is softer than 78% 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. Anchorage has PFOA at 9.1 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
Anchorage's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 8.48 ppb (11% of the legal limit, but 57x the EWG guideline) and HAA5 at 4.68 ppb (8% of the legal limit, but 47x 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 0.585 ppb, which is 29x 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 | 50 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 15.13 ppt | — | No total limit | Detected |
| ↳ PFOA | 9.1 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 | 0.5 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.563 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommended Filter for Anchorage
PFAS exceed EPA limits (PFOA: 9.1 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
How to Test Your Water in Anchorage
With PFAS at 15.13 ppt in Anchorage'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 AWWU's annual Consumer Confidence Report for official city-level data.
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About Anchorage's Water Supply
Water Utility: AWWU
Water Source: Eklutna Lake + Ship Creek (Surface Water)
Population Served: 221,351
Hardness: 35 PPM (2 grains per gallon)
Anchorage's drinking water comes from surface sources — Eklutna Lake + Ship Creek. 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 221,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request AWWU'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 AWWU in Anchorage, AK, including ZIP codes:
99501, 99502, 99503, 99504, 99507, 99508, 99509, 99510, 99511, 99513, 99514, 99515, 99516, 99517, 99518, 99519, 99520, 99521, 99522, 99523, 99524, 99529, 99530, 99577, 99599, 99695
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Anchorage to Other Alaska Cities
Frequently Asked Questions About Anchorage Water
Is Anchorage tap water safe to drink?
Where does Anchorage's water come from?
Do I need a water softener in Anchorage?
How do I remove PFAS from Anchorage tap water?
What water filter is best for Anchorage?
Is Anchorage water safe for babies and infants?
What are disinfection byproducts in Anchorage's water?
Is chromium-6 in Anchorage'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 Anchorage 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 Anchorage's water data.