Water Quality in Doon, IA: 1 Violation — Grade C
Grade C · Score 66/100 · 2 water systems · Updated 2026-05-03
Doon'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
Federal EPA data for Doon, IA shows 1 water compliance event in the record — the table below identifies system names and violation types.
Water Quality by ZIP Code in Doon
Water quality varies across Doon's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 51235 | C | 66 | 1 | 0 | View report → |
Water Quality Overview
Doon, Iowa receives a water quality grade of C with an overall score of 66 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 2 water systems serving Doon have accumulated 1 EPA violations (all monitoring/reporting type). These violations are tracked across 1 ZIP codes serving approximately 2,384 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Doon'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 Doon water systems is 0.0040 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 68% of homes built before 1986, Doon 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
Doon 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 Doon
Doon is served by 2 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 2,384 people across 1 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 4 enforcement actions against water systems serving Doon. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Doon
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
EPA Enforcement History
The EPA and state regulators have taken 4 enforcement actions against water systems serving Doon. Recent actions:
| Date | Action Type |
|---|---|
| 2023-02-02 | State Informal Action |
| 2023-01-18 | State Filed Judgment |
| 2023-01-18 | State Informal Enforcement |
| 2023-01-10 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2023-02-02.
Doon vs. Nearby Iowa Cities
How Doon's water quality compares to similar cities in Iowa:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Doon | C | 1 | 2 | 2,384 |
| Cascade | C | 0 | 1 | 2,386 |
| Luzerne | D | 0 | 1 | 2,380 |
| Toledo | C | 1 | 1 | 2,399 |
Common Questions About Doon Water
These are the most common questions residents search for about water quality in Doon, Iowa:
Is Doon water hard or soft? Water hardness varies by source. Doon's 2 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Doon tap water? Doon's water receives a grade of C (66/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Doon? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Doon vs. Iowa Average
Understanding how Doon compares to the broader Iowa 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 Doon.
ZIP Codes in Doon
Doon spans 1 ZIP code. The ZIP with the lowest water quality score is 51235. 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.