US Water Score: C
| Contaminant | Detected Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| Lead |
18.0
|
15 ppb | 1 ppb | |
| Copper |
1780.0
|
1300 ppb | 300 ppb |
Water Quality Summary
Tap water quality in Ellicott City, Maryland (21042) receives an overall grade of C (Mixed record-based signals) with a score of 68 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 12 points below the Maryland state average of 80. The area is served by 4 water systems providing water to approximately 315 people, using surface water and groundwater sources. Over the past 5 years, water systems here have accumulated 116 violations, including 3 health-based violations.
A score of 68/100 indicates fair performance in the US Water Score model for Ellicott City, MD. The records show noteworthy concerns, such as elevated contaminant levels, violation history, or both. Review the detailed contaminant data and official utility reports before making decisions.
Health Information
Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.
Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.
Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.
If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.
Copper can leach into water from copper plumbing, especially in newer homes or when water is acidic.
Short-term exposure above 1,300 ppb can cause gastrointestinal distress. Long-term exposure may cause liver or kidney damage. People with Wilson's disease are especially vulnerable.
Copper pipes, fittings, and faucets are the most common source. Corrosive (low-pH) water accelerates copper leaching.
If copper levels are elevated, flush pipes by running water for 15–30 seconds before use. Reverse osmosis and distillation systems effectively remove copper.
Common Questions
Ellicott City, Maryland receives an internal US Water Score grade of C (Fair) with a score of 68/100. Our model found some system-level concerns, such as violation history or elevated contaminant levels. Review your utility's Consumer Confidence Report and consult a qualified professional for household-specific health questions.
ZIP code 21042 is served by 4 water systems using surface water, groundwater sources, providing water to approximately 315 people. Multiple source types mean your water may come from a blend of surface and underground sources.
Lead levels in the public-system record for Ellicott City, Maryland are 18.0 ppb, above the currently applicable EPA action level of 15 ppb. EPA's Lead and Copper Rule Improvements lower that action level to 10 ppb when the new requirements take effect. This system-level result does not measure an individual tap; consider a certified lead-removal filter and independent tap testing.
Water systems serving Ellicott City, Maryland were not tested for PFAS under the EPA's UCMR5 monitoring program. This does not mean PFAS are absent — it means no data is currently available. UCMR5 testing covered approximately 10,000 of the largest water systems nationwide. You can request PFAS testing from your water utility or use a certified home test kit.
Water systems serving Ellicott City, Maryland have received 116 violations in the last 5 years, including 3 health-based violations. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.
Based on detected contaminants (lead, copper), residents in Ellicott City, Maryland should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.
Explore Nearby