Poor Water Quality
| Contaminant | Detected Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| Lead |
3.0
|
15 ppb | 1 ppb | Warning |
| Compound | Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| PFBS | 5.6 ppt | 2000 ppt | 100 ppt | Below limit |
| PFPeA | 4.7 ppt | No standard | — | Unregulated |
| PFHxA | 4.3 ppt | No standard | 400 ppt | Unregulated |
Water Quality Summary
Tap water quality in Lewiston, Idaho (83501) receives an overall grade of D (Poor) with a score of 52 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 17 points below the Idaho state average of 69. Compared to the national average (75), this area scores significantly lower. The area is served by 10 water systems providing water to approximately 36,156 people, using surface water and groundwater sources. Testing has found elevated levels of Lead that warrant attention. PFAS testing detected 3 compounds, all currently below EPA limits. Over the past 5 years, water systems here have accumulated 103 violations, including 2 health-based violations.
A score of 52/100 signals poor water quality in Lewiston, ID. Significant issues have been identified, which may include multiple violations, contaminant levels near or above regulatory limits, or PFAS contamination. We recommend reviewing the detailed contaminant data below, considering a certified water filter, and checking your utility's Consumer Confidence Report for the latest information.
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.
Common Questions
Tap water in Lewiston, Idaho receives a grade of D (Poor) with a score of 52/100. 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 83501 is served by 10 water systems using surface water, groundwater sources, providing water to approximately 36,156 people. Multiple source types mean your water may come from a blend of surface and underground sources.
Lead was detected at 3.0 ppb in Lewiston, Idaho. While this is below the EPA action level of 15 ppb, it exceeds the health guideline of 1 ppb recommended by health organizations. Consider a certified lead filter, especially if you have young children.
3 PFAS compounds were detected in water serving Lewiston, Idaho, but all are currently below EPA limits. While levels are within regulatory standards, some health organizations recommend minimizing any PFAS exposure. Activated carbon or reverse osmosis filters can reduce PFAS levels.
Water systems serving Lewiston, Idaho have received 103 violations in the last 5 years, including 2 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, PFAS), residents in Lewiston, Idaho should consider: Reverse osmosis (RO) system — most effective for PFAS, lead, and other contaminants. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.