Community Water System · PWS VA6033425
Lake Caroline
Operator location Rockville, Virginia - 63% of 468 violations are health-based (upper-third health share (> 23%)); surface water source; 2,933 served per SDWIS.
- 2,933
- People served (this PWS)
- 468
- EPA violations (this PWS)
- 294
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Lake Caroline standing, high SDWIS violation third
63% of 468 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 63% is upper-third health share (> 23%). Population rank #10,835 of 29,740 among systems serving 500+.
The verdict
Lake Caroline sits in the upper third of the sitemap cohort by violation count (468), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 2,933 (mid served population (≤ 3,309)). Health-based share is 63% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #10,835 of 29,740
- Population · /systems
- #172 of 570
- Population · VA
- 468
- Total EPA violations on record
- 63%
- 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
- Private
- Connections
- 1,173
- County
- Caroline
- School/Daycare
- No
- MCL Violations
- 233
- Monitoring Violations
- 161
- Treatment Tech Violations
- 61
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL | 117 | 2009 |
| TTHM | MCL | 116 | 2009 |
| CARBON, TOTAL | TT | 57 | 2009 |
| Arsenic | MR | 17 | 1985 |
| Cadmium | MR | 17 | 1985 |
| Chromium | MR | 17 | 1985 |
| Mercury | MR | 17 | 1985 |
| Selenium | MR | 17 | 1985 |
| Barium | MR | 17 | 1985 |
| Fluoride | MR | 16 | 1985 |
| Nitrate | MR | 16 | 1985 |
| Interim Enhanced Surface Water Treatment Rule | MR | 6 | 2005 |
| Coliform (TCR) | MR | 5 | 1995 |
| Lead and Copper Rule | TT | 4 | 1996 |
| TTHM | MR | 4 | 2009 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2009 |
| Consumer Confidence Rule | Other | 4 | 2012 |
| Toxaphene | MR | 1 | 1980 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1977 |
| Endrin | MR | 1 | 1980 |
| Combined Radium (-226 and -228) | MR | 1 | 1977 |
| 2,4-D | MR | 1 | 1980 |
| BHC-GAMMA | MR | 1 | 1980 |
| Methoxychlor | MR | 1 | 1980 |
| 2,4,5-TP | MR | 1 | 1980 |
Violation Count vs. the National Corpus
Lake Caroline has 468 recorded EPA violations, 95% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 5% carry more. 63% of this system's own violations are health-based (294 of 468), and it ranks #10,835 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)
468 Higher than most more violations than 95% 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
Health-based violations on Lake Caroline
294 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for VA6033425.
Sources: EPA SDWIS · Virginia Department of Health, Office of Drinking Water
Nationwide peers
468 violations · 2,933 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
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 Lake Caroline
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.