Sherwood, MD Water Safety: 65/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Within Sherwood, water safety data for MD reveals moderate quality — federal standards are generally met, but documented exceptions exist in specific service areas.
How Sherwood Compares
Data: EPA SDWIS Last verified: 2026-06-03
Sherwood Water: The Quick Version
- Homes built before 1986: 29% — older plumbing may contain lead solder.
- Estimated remediation: $2,500 per household.
- CDC health risk index: 13.76 — above typical levels.
Water Systems Serving Sherwood
For most households in Sherwood, MD, tap water comes from one provider — the utility that controls the local distribution system out of 1 tracked in federal record.
Overview
We track water quality and home safety data for 1 ZIP code in Sherwood, Maryland, covering 1 community water system serving approximately 169 people.
No EPA violations recorded across any ZIP codes in Sherwood — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Sherwood: C (65/100)
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
Sherwood water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Sherwood
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 21665 | C | CLAIBORNE | 60 |
All ZIP Codes in Sherwood
- 21665 [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.
CDC Health Data for Sherwood
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
How Old Is Sherwood's Housing Stock?
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
For most of Sherwood's housing stock, construction occurred after 1986 — when lead solder in plumbing was federally prohibited. The median build year of 1996 broadly reflects that newer profile.
Most homes in Sherwood were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Sherwood: Remediation Cost in Perspective
How much of a Sherwood home's value does documented remediation represent? A small fraction — the equity share here is in the low tier, and from a household financial perspective, most property owners are considering a commitment that fits comfortably within standard planning rather than a decision that rises to the level of a material budget event or significant equity consideration.
Remediation costs in Sherwood are relatively low compared to home values. The $1,800–$4,000 estimated range is a small fraction of median property value. Home values are 23% above the Maryland average.
Protecting Children from Lead in Sherwood
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.
Even with citywide samples reading clean and just 29% of Sherwood homes dating to the pre-rule era, individual-faucet conditions remain a separate question that aggregate utility data cannot resolve for one specific address. That gap is structural, not a function of severity.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Sherwood
Multiple flood events have been recorded for Sherwood through the NFIP — 19 claims in total, with 100% of ZIP codes in FEMA-designated zones — pointing to a flood exposure profile that merits inclusion in a water quality assessment without reaching high-severity planning territory.
Sherwood has a moderate flood history with 19 FEMA claims averaging $68,065 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>$2,500</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 Sherwood
- 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. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Sherwood, MD