Rockville, MD: 16 Violations - Home Safety 61/100
8 ZIP codes · 2 water systems · Updated
ZipCheckup grade for Rockville: C.
A mixed picture - some signals here are worth your attention.
Based on current EPA data, Rockville, MD reflects fair but uneven tap water safety.
How Rockville Compares
Data: EPA SDWIS
Rockville Water: The Quick Version
- Your city's water systems recorded 16 violations in the past 5 years.
- Estimated remediation: $2,113 per household.
- CDC health risk index: 10.24.
Water Systems Serving Rockville
Rockville, MD draws its residential water from 2 separate providers among the 2 federally tracked systems. Each operates independently, with its own infrastructure, rate structure, and compliance record.
- C
- C
Overview
We track home safety data for 8 ZIP codes in Rockville, Maryland (population ~144,320), covering 2 community water systems serving approximately 1,952,000 people region-wide. The EPA snapshots used for this build directly map water systems to 4 of 8 ZIP codes.
4 of 4 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Rockville: C (61/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Rockville water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0000 mg/L (EPA action level: 0.015 mg/L)
- 0 of 4 ZIP codes with known status exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 8 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Contaminant 2005 | Other | 5 | 4 |
| Contaminant 2010 | Other | 5 | 4 |
| Contaminant 2015 | Other | 5 | 4 |
| Contaminant 2020 | Other | 5 | 4 |
| Contaminant 2035 | Other | 5 | 4 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 20850 | C | 16 | 0 | City of Rockville |
| 20851 | C | 16 | 0 | City of Rockville |
| 20852 | C | 16 | 0 | Washington Suburban Sanitary Commission |
| 20853 | C | 16 | 0 | Washington Suburban Sanitary Commission |
All ZIP Codes in Rockville
- 20847
- 20848
- 20849
- 20850 [C] - 16 violations
- 20851 [C] - 16 violations
- 20852 [C] - 16 violations
- 20853 [C] - 16 violations
- 20857
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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
CDC Health Data for Rockville
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Rockville
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Rockville: Remediation Cost in Perspective
Property equity in Rockville runs well ahead of estimated remediation costs - a cost-to-value ratio that sits in the low tier, meaning documented water and safety issues here are the kind homeowners can plan to address without treating the expense as a significant budget event relative to what their homes are worth.
Remediation costs in Rockville are relatively low compared to home values. The $1,388–$2,900 estimated range is a small fraction of median property value. Home values are 51% above the Maryland average.
Historical Flood-Claim Evidence for Rockville
Historical NFIP data for Rockville contains 70 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $10,556. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The <strong>$2,113</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Rockville
- Test your water at home. City-level data shows averages - your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for Contaminant 2005 can reduce the most common contaminant found in Rockville's water.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Rockville, MD