Water Quality in Anchorage, AK: 7300 Violations — Grade C
Grade C · Score 58/100 · 5 water systems · Updated 2026-05-03
Anchorage's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Available EPA records for Anchorage, AK: 7300 water compliance violations tied to local public water systems.
Water Quality Map: Anchorage, AK
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Water Quality by ZIP Code in Anchorage
Water quality varies across Anchorage's 25 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 99504 | C | 65 | 292 | 20 | View report → |
| 99507 | C | 65 | 292 | 20 | View report → |
| 99508 | C | 65 | 292 | 20 | View report → |
| 99509 | C | 66 | 292 | 20 | View report → |
| 99511 | C | 66 | 292 | 20 | View report → |
| 99513 | C | 66 | 292 | 20 | View report → |
| 99514 | C | 66 | 292 | 20 | View report → |
| 99520 | C | 66 | 292 | 20 | View report → |
| 99521 | C | 66 | 292 | 20 | View report → |
| 99522 | C | 66 | 292 | 20 | View report → |
| 99523 | C | 66 | 292 | 20 | View report → |
| 99524 | C | 66 | 292 | 20 | View report → |
| 99529 | C | 66 | 292 | 20 | View report → |
| 99530 | C | 66 | 292 | 20 | View report → |
| 99599 | C | 66 | 292 | 20 | View report → |
Violation Trend
EPA violations recorded for water systems serving Anchorage.
Water Quality Overview
Anchorage, Alaska receives a water quality grade of C with an overall score of 58 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 5 water systems serving Anchorage have accumulated 7300 EPA violations, including 500 health-based violations. These violations are tracked across 25 ZIP codes serving approximately 229,426 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Anchorage's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Anchorage water systems is 0.0016 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 62% of homes built before 1986, Anchorage has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Radon Risk
Anchorage is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Anchorage
Anchorage is served by 5 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 229,426 people across 25 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 250 enforcement actions against water systems serving Anchorage. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Anchorage
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Anchorage Water Systems
The following contaminants have been detected or caused violations across Anchorage's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| E. coli | Microbiological | N/A | 1850 | 25 | Yes |
| Fecal Coliform | Microbiological | N/A | 1075 | 25 | Yes |
| Revised Total Coliform Rule | Microbiological | N/A | 850 | 25 | No |
| Total Coliform | Microbiological | N/A | 725 | 25 | No |
| Surface Water Treatment Rule | Treatment Technique | N/A | 375 | 25 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 350 | 25 | No |
| Chlorite | Disinfection Byproducts | 1 mg/L | 275 | 25 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 250 | 25 | No |
| Total Organic Carbon | Disinfection Byproducts | N/A | 125 | 25 | No |
| Lead and Copper Rule | Treatment Technique | N/A | 125 | 25 | No |
| Lead | Inorganic | 0.015 mg/L | 75 | 25 | No |
| Stage 2 DBP Rule | Treatment Technique | N/A | 50 | 25 | Yes |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Anchorage:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2021 | 25 | 25 |
| 2022 | 25 | 25 |
Violation counts have remained stable over the observed period.
EPA Enforcement History
The EPA and state regulators have taken 9 enforcement actions against water systems serving Anchorage. Recent actions:
| Date | Action Type |
|---|---|
| 2025-09-11 | State Informal Action |
| 2025-07-21 | State Informal Action |
| 2025-07-15 | State Informal Enforcement |
| 2025-07-02 | State Informal Action |
| 2025-04-03 | State Informal Action |
| 2025-01-31 | State Order Extension |
| 2024-12-12 | State Formal Action |
| 2024-12-12 | State Informal Enforcement |
| 2024-10-03 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-09-11.
Anchorage vs. Nearby Alaska Cities
How Anchorage's water quality compares to similar cities in Alaska:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Anchorage | C | 7300 | 5 | 229,426 |
| Indian | D | 0 | 1 | 221,351 |
| Fairbanks | B | 130 | 5 | 151,884 |
| Ester | D | 0 | 1 | 78,324 |
Water Quality by ZIP Code in Anchorage
Water quality varies across Anchorage's ZIP codes. The table below shows the worst-scoring and best-scoring areas:
| ZIP Code | Score | Grade | Violations | Health-Based |
|---|---|---|---|---|
| 99504 | 65 | C | 292 | 20 |
| 99507 | 65 | C | 292 | 20 |
| 99508 | 65 | C | 292 | 20 |
| 99509 | 66 | C | 292 | 20 |
| 99511 | 66 | C | 292 | 20 |
| 99513 | 66 | C | 292 | 20 |
| 99514 | 66 | C | 292 | 20 |
| 99520 | 66 | C | 292 | 20 |
| 99521 | 66 | C | 292 | 20 |
| 99522 | 66 | C | 292 | 20 |
| 99519 | 70 | B | 292 | 20 |
| 99518 | 70 | B | 292 | 20 |
| 99517 | 70 | B | 292 | 20 |
| 99516 | 70 | B | 292 | 20 |
| 99515 | 70 | B | 292 | 20 |
Common Questions About Anchorage Water
These are the most common questions residents search for about water quality in Anchorage, Alaska:
Is Anchorage water hard or soft? Water hardness varies by source. Anchorage's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Anchorage tap water? Anchorage's water receives a grade of C (58/100). There are 500 health-based violations — consider filtration.
What is the best water filter for Anchorage? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Anchorage vs. Alaska Average
Understanding how Anchorage compares to the broader Alaska average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Anchorage.
ZIP Codes in Anchorage
Anchorage spans 25 ZIP codes. The ZIP with the lowest water quality score is 99501. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.