Community Water System · PWS VA3001620
Onancock, Town Of
Operator location Onancock, Virginia - lower-third violation load (≤ 21 violations) with 20 EPA violations; groundwater source; 1,525 served (PWS-level, not municipal population).
- 1,525
- People served (this PWS)
- 20
- EPA violations (this PWS)
- 4
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Onancock, Town Of standing, low SDWIS violation third
20 EPA SDWIS violations on record - lower-third violation load (≤ 21 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 20% is middle-third health share (≤ 23%). Population rank #15,723 of 29,740 among systems serving 500+.
The verdict
Onancock, Town Of is in the lower third by violation count (20; lower-third violation load (≤ 21 violations)). A low count does not mean the system is unmonitored - monitoring and reporting violations still appear in SDWIS. Population served is mid-pack at 1,525 (mid served population (≤ 3,309)). Health-based share is 20% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #15,723 of 29,740
- Population · /systems
- #280 of 570
- Population · VA
- 20
- Total EPA violations on record
- 20%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 721
- County
- Accomack
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 16
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 9 | 2025 |
| Coliform (TCR) | MCL | 4 | 2007 |
| Nitrate-Nitrite | MR | 4 | 2018 |
| Coliform (TCR) | MR | 3 | 1998 |
Violation Count vs. the National Corpus
Onancock, Town Of has 20 recorded EPA violations, 31% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 67% carry more. 20% of this system's own violations are health-based (4 of 20), and it ranks #15,723 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
20 Lower than most fewer violations than 67% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
SDWIS compliance record for Onancock, Town Of
20 violations on record for VA3001620; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS · Virginia Department of Health, Office of Drinking Water
Nationwide peers
20 violations · 1,525 served: nearest cross-state SDWIS matches.
Cross-state systems with similarly light violation ledgers
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Onancock, Town Of
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Virginia compares on the same EPA violation measures. Virginia systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.