Jarrettsville, MD Water Safety: 63/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
For most households in Jarrettsville, MD tap water is adequate — the middle-tier grade reflects gaps in specific service areas.
How Jarrettsville Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Jarrettsville Water
- Homes built before 1986: 67% — older plumbing may contain lead solder.
- Estimated remediation: $1,600 per household.
- CDC health risk index: 12.41 — above typical levels.
Who Supplies Your Water in Jarrettsville
2 water systems are tracked federally in Jarrettsville, MD. The top 2 providers collectively serve most residential addresses, but because they operate independently, infrastructure maintenance standards and compliance histories differ from one service zone to another.
Overview
We track water quality and home safety data for 1 ZIP code in Jarrettsville, Maryland (population ~7,488), covering 2 community water systems serving approximately 105,027 people region-wide.
No EPA violations recorded across any ZIP codes in Jarrettsville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Jarrettsville: C (63/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Jarrettsville water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Jarrettsville
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 21084 | C | Harford County D.p.w. | 104,567 |
All ZIP Codes in Jarrettsville
- 21084 [C]
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
Updated daily.
Health Outcomes in Jarrettsville
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
Housing & Infrastructure in Jarrettsville
With 67% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
For residents trying to assess tap water risk in Jarrettsville, the median build year of 1971 is the starting context. It signals that a majority of homes were constructed before 1986 — the year federal rules prohibited lead solder in new plumbing — and that a significant share likely predates 1970, when lead pipes were still a common choice for residential service connections. Neither risk tier is rare in this housing inventory.
Over half of homes in Jarrettsville were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Jarrettsville Homeowners
When estimated remediation is placed alongside median property values in Jarrettsville, the resulting ratio is low — a finding consistent with a household financial perspective where documented issues can be addressed without a meaningful impact on overall equity position, making this market one of the more favorable contexts for remediation planning.
Remediation costs in Jarrettsville are relatively low compared to home values. The $800–$2,600 estimated range is a small fraction of median property value. Home values are 4% above the Maryland average.
Lead Exposure Risk for Children in Jarrettsville
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Before the federal solder ban, lead solder was a routine plumbing material, and 67% of the Jarrettsville inventory was built in that earlier era — a share large enough to move household-level reads onto the standard list.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Jarrettsville
FEMA data shows 100% of Jarrettsville's ZIP codes mapped into designated flood zones, paired with an NFIP record of 5 claims. That footprint places local flood exposure in the range where it warrants attention without rising to high-severity planning territory.
Jarrettsville has a moderate flood history with 5 FEMA claims averaging $2,057 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
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. Flood damage can add significantly to the estimated <strong>$1,600</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Jarrettsville
- 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. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 67% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Jarrettsville, MD