CITY REPORT MD

Riverdale, MD: High Radon Risk - Home Safety 83/100

Name: Water Quality Data for Riverdale, MD
Creator: ZipCheckup
License: https://creativecommons.org/licenses/by/4.0/

2 ZIP codes · 1 water system · Updated

ZipCheckup grade for Riverdale: B.

This ZIP looks solid, with a few items worth a quick check.

Riverdale tap water earns a high safety grade - above-average compliance with MD and federal standards.

How Riverdale Compares

Riverdale83/100

Maryland avg69/100

National avg73/100

Data: EPA SDWIS

ZIP Codes

Water Systems

ZIPs with Violations

B · 83

Avg Safety Score

Zone 1

Radon Risk (High)

$370K

Median Home Value

$1,900

Est. Remediation (0.5% of home value)

Key Facts for Riverdale Residents

Estimated remediation: $1,900 per household.
CDC health risk index: 13.05 - above typical levels.

Riverdale's Water Providers

While 1 water system appear in federal records for Riverdale, MD, one provider supplies the majority of residential connections - making it the central point of infrastructure and compliance accountability for most households.

Washington Suburban Sanitary Commission
Serves ~1,900,000 people

B

Overview

We track home safety data for 2 ZIP codes in Riverdale, Maryland (population ~24,987), covering 1 community water system serving approximately 1,900,000 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 2 ZIP codes.

The available EPA record reports 0 violations for 1 ZIP code with a reported violation count.

Home Safety Score

Average Home Safety Score for Riverdale: B (83/100)

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

Riverdale 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 1 ZIP code with known status exceed the EPA lead action level

Radon Risk

Dominant radon zone: Zone 1 (High Risk)

Zone 1 (High): 1 ZIP code
Zone 2 (Moderate): 1 ZIP code
Zone 3 (Low): 0 ZIP codes

The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.

Areas with No Violations

ZIP Code	Safety Score	System	Population
20737	B	Washington Suburban Sanitary Commission	1,900,000

All ZIP Codes in Riverdale

20737 [B]
20738

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.

Riverdale Community Health Snapshot

11.5%

Asthma (US: 9.8%)

15.2%

Diabetes (US: 10.4%)

14.3%

Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.

Compared to National Average

Asthma 11.5% ↑

Diabetes 15.2% ↑

Mental Health 14.3% ↓

Vertical line = national average. ■ Above national · ■ Below national

How Remediation Costs Compare in Riverdale

While no remediation project is entirely without cost, the relationship between estimated remediation and property values in Riverdale is notably favorable - the equity share is small enough that the household financial perspective is one of proportionality rather than pressure, and most homeowners can treat it as routine planning rather than a significant financial event.

Median Home Value

$370,300

Est. Remediation

$1,900

Remediation as % of home value 0.5%

Remediation costs in Riverdale are relatively low compared to home values. The $1,100–$2,850 estimated range is a small fraction of median property value. Home values are 13% below the Maryland average.

Riverdale: NFIP Claim Records and Water-Quality Context

Total FEMA Flood Claims

$8,153

Avg Reported Sum With Payment Data

100%

A/V Share of Claim-Record ZIPs

Historical NFIP data for Riverdale contains 63 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $8,153. Among ZIP codes with claim records, 100% 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>$1,900</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.

Deep Dive Reports

Detailed analysis for Riverdale, MD

💧

Water Quality

EPA violations, contaminant data, and water system grades

0 EPA violations

⚠️

Lead Risk

Lead levels, housing age, and pipe risk assessment

0 mg/L avg lead

🌊

Flood Risk

NFIP claim history, recorded rated-zone context, and FEMA property-map guidance

2 monitored ZIP codes

🌬️

Air Quality

AQI data, wildfire smoke risk, mold risk, and health tips

🏠

Home Safety

Composite safety score, remediation costs, equity trap analysis

83/100 safety score

🔧

Infrastructure

Water system age, source indicators, and CO/gas safety

Compare with Nearby Cities

Abell, MD

1 ZIP code

Aberdeen, MD

1 ZIP code · 5 EPA violations · Grade D

Aberdeen Proving Ground, MD

1 ZIP code · 3 EPA violations · Grade D

Abingdon, MD

1 ZIP code · 3 EPA violations · Grade C

Accident, MD

1 ZIP code

Frequently Asked Questions

What does the Home Safety Score mean for Riverdale, MD?

Riverdale has an average Home Safety Score of 83/100 (Grade B) under model 4.0.0. The score combines EPA SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the PFAS MCL screen, EPA radon zone, and annual EPA AQI, and is published only when all required domains are observed. The available EPA record reports no violations for ZIP codes with reported counts. Check individual ZIP code reports for component details.

How does Riverdale compare to Maryland average?

Riverdale has an average Home Safety Score of 83/100, which is above the Maryland state average of 69/100 for the same model series.

How many water systems serve Riverdale?

Riverdale is served by 1 public water system across 2 ZIP codes, serving approximately 24,987 people.

How much does it cost to fix water issues in Riverdale?

Estimated remediation costs in Riverdale average $1,900 per household, ranging from $1,100 to $2,850. Costs include filtration, pipe replacement, radon mitigation, and flood protection.

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