US Water Score: D
| Contaminant | Detected Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| Lead |
301.0
|
15 ppb | 1 ppb | |
| Copper |
1680.0
|
1300 ppb | 300 ppb |
Water Quality Summary
Tap water quality in Duncannon, Pennsylvania (17020) receives an overall grade of D (Elevated record-based concern) with a score of 39 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 25 points below the Pennsylvania state average of 64. Compared to the national average (75), this area scores significantly lower. The area is served by 6 water systems providing water to approximately 2,000 people, using groundwater sources. Over the past 5 years, water systems here have accumulated 94 violations, including 7 health-based violations.
A score of 39/100 flags significant system-level concerns in the US Water Score model for Duncannon, PA. These may include violations, contaminant levels near or above regulatory limits, or PFAS detections. Review the detailed records, your utility's Consumer Confidence Report, and qualified local guidance.
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
Tap water in Duncannon, Pennsylvania receives a grade of D (Elevated record-based concern) with a score of 39/100. This indicates significant water quality concerns based on violation history, contaminant levels, or enforcement actions. We recommend reviewing the specific contaminants detected below and considering a certified water filter.
ZIP code 17020 is served by 6 water systems using groundwater sources, providing water to approximately 2,000 people. Groundwater is naturally filtered through rock and soil, often requiring less treatment. However, it can be vulnerable to contamination from underground sources like naturally occurring arsenic, nitrates from agriculture, or PFAS from industrial sites.
Lead levels in the public-system record for Duncannon, Pennsylvania are 301.0 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.
No PFAS ("forever chemicals") were detected in water systems serving Duncannon, Pennsylvania during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.
Water systems serving Duncannon, Pennsylvania have received 94 violations in the last 5 years, including 7 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 Duncannon, Pennsylvania 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.