Community Water System · PWS SD4600117
Elkton
Operator location Elkton, South Dakota - 32% of 53 violations are health-based (upper-third health share (> 23%)); groundwater source; 755 served per SDWIS.
- 755
- People served (this PWS)
- 53
- EPA violations (this PWS)
- 17
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Elkton standing, mid SDWIS violation third
32% of 53 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 32% is upper-third health share (> 23%). Population rank #23,258 of 29,740 among systems serving 500+.
The verdict
Elkton lands in the middle third by violation volume (53), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (755; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 32% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #23,258 of 29,740
- Population · /systems
- #130 of 171
- Population · SD
- 53
- Total EPA violations on record
- 32%
- 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
- 320
- County
- Brookings
- School/Daycare
- No
- MCL Violations
- 15
- Monitoring Violations
- 20
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 15 | 2004 |
| Nitrate | MCL | 12 | 1989 |
| Coliform (TCR) | MCL | 3 | 2013 |
| Revised Total Coliform Rule | MON | 3 | 2022 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 2 | 2017 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
Violation Count vs. the National Corpus
Elkton has 53 recorded EPA violations, 58% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 41% carry more. 32% of this system's own violations are health-based (17 of 53), and it ranks #23,258 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)
53 Around the middle fewer violations than 41% 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 Elkton
17 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for SD4600117.
Sources: EPA SDWIS
Nationwide peers
53 violations · 755 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Elkton
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in South Dakota compares on the same EPA violation measures. South Dakota 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.