Water Quality in JOHNSTOWN, PA (15904)
EPA violation data for public water systems serving ZIP code 15904.
92
Total Violations
12
Health-Based
80
Monitoring / Reporting
92
Resolved
What does this mean?
92 of 92 violations have been resolved. 12 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 80 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.
Violations Detail (92 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Groundwater Rule | Monitoring | N/A | N/A | Nov 30, 2024 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Nov 30, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Aug 6, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Aug 6, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Aug 6, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Aug 6, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Apr 25, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Apr 25, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Apr 25, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Apr 25, 2024 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2024(18)
Groundwater Rule
31
Groundwater Rule
31
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
TTHM
02
TTHM
02
TTHM
02
TTHM
02
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
2023(12)
CYANIDE
03
CYANIDE
03
TTHM
02
TTHM
02
TTHM
02
TTHM
02
TTHM
02
TTHM
02
TTHM
02
TTHM
02
CARBON, TOTAL
27
CARBON, TOTAL
27
How Does This Compare?
JOHNSTOWN (15904) has 92 recorded violations, including 12 health-based. All violations have been resolved, which is a positive sign for current water quality. Consider testing your tap water independently for added peace of mind.
Recommended Water Filters
Based on the contaminants detected in your area, these filter types may help improve your water quality.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove.