Water Quality in Rock Island, TX: 2 Violations — Grade A
Grade A · Score 85/100 · 1 water system · Updated 2026-05-03
Rock Island's water meets all EPA standards with no health-based violations.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
The public EPA compliance record for Rock Island, TX holds 2 documented water violations — sourced from the federal Safe Drinking Water Information System, which tracks every reportable event for registered public water systems in the state.
Water Quality by ZIP Code in Rock Island
Water quality varies across Rock Island's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 77470 | A | 85 | 2 | 0 | View report → |
Water Quality Overview
Rock Island, Texas receives a water quality grade of A with an overall score of 85 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 1 water system serving Rock Island have accumulated 2 EPA violations (all monitoring/reporting type). These violations are tracked across 1 ZIP codes serving approximately 230 people.
What Grade A Means
A grade of A indicates excellent compliance with EPA drinking water standards. Rock Island's water systems have maintained strong performance in both contaminant monitoring and regulatory compliance.
Lead Levels
Lead testing data for Rock Island is currently being collected. The EPA requires all community water systems to test for lead under the Lead and Copper Rule.
With 79% of homes built before 1986, Rock Island 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.
Water Systems Serving Rock Island
Rock Island is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 230 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 Rock Island. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Rock Island
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 Rock Island Water Systems
The following contaminants have been detected or caused violations across Rock Island's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Revised Total Coliform Rule | Microbiological | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 4 enforcement actions against water systems serving Rock Island. Recent actions:
| Date | Action Type |
|---|---|
| 2023-08-09 | State Informal Action |
| 2023-07-13 | State Order Extension |
| 2023-07-05 | State Informal Action |
| 2023-07-05 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2023-08-09.
Rock Island vs. Nearby Texas Cities
How Rock Island's water quality compares to similar cities in Texas:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Rock Island | A | 2 | 1 | 230 |
| Afton | C | 0 | 1 | 231 |
| Roaring Springs | B | 10 | 1 | 231 |
| Forsan | B | 64 | 1 | 228 |
Common Questions About Rock Island Water
These are the most common questions residents search for about water quality in Rock Island, Texas:
Is Rock Island water hard or soft? Water hardness varies by source. Rock Island's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Rock Island tap water? Rock Island's water receives a grade of A (85/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Rock Island? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Rock Island vs. Texas Average
Understanding how Rock Island compares to the broader Texas 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 Rock Island.
ZIP Codes in Rock Island
Rock Island spans 1 ZIP code. The ZIP with the lowest water quality score is 77470. 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.
Frequently Asked Questions
Your Water is Safe — Here's How to Keep It That Way
Grade A is excellent news. Here's what proactive homeowners do to maintain water quality:
Annual Water Testing
EPA recommends annual testing even with clean water. Home test kits: $20-$50. Catches changes before they become problems.
Maintenance Filtration
A basic carbon filter removes chlorine taste and catches emerging contaminants like PFAS that aren't yet fully regulated.
Plumbing Check
Even safe city water picks up lead from home pipes. If your home was built before 1986, a one-time pipe inspection is recommended.