Water Quality in DEFIANCE, PA (16633)
EPA violation data for public water systems serving ZIP code 16633.
62
Total Violations
0
Health-Based
62
Monitoring / Reporting
62
Resolved
What does this mean?
62 of 62 violations have been resolved. None of these are health-based violations — no contaminant levels exceeded federal safety limits. The remaining 62 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 (62 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2025 | Resolved | N/A |
| 2,3,7,8-TCDD | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | N/A |
| Fluoride | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | Bone disease (pain and tenderness of the bones); children may get mottled teeth |
| Chromium | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | Allergic dermatitis |
| Mercury | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | Kidney damage |
| 2,3,7,8-TCDD | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | N/A |
| Selenium | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | Hair or fingernail loss; numbness in fingers or toes; circulatory problems |
| Selenium | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | Hair or fingernail loss; numbness in fingers or toes; circulatory problems |
| Barium | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | Increase in blood pressure |
Violation Timeline
2025(2)
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
2023(27)
2,3,7,8-TCDD
03
Fluoride
03
Chromium
03
Mercury
03
2,3,7,8-TCDD
03
Selenium
03
Selenium
03
Barium
03
Antimony, Total
03
Barium
03
Mercury
03
Thallium, Total
03
Thallium, Total
03
Beryllium, Total
03
Beryllium, Total
03
Nickel
03
Nickel
03
Arsenic
03
Arsenic
03
Cadmium
03
Cadmium
03
Fluoride
03
Chromium
03
CYANIDE
03
CYANIDE
03
Antimony, Total
03
Surface Water Treatment Rule
36
How Does This Compare?
DEFIANCE (16633) has 62 recorded violations, none of which are 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
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove.