Community Water System · PWS SD4600185
Lake Andes
Operator location Lake Andes, South Dakota - 37% of 52 violations are health-based (upper-third health share (> 23%)); surface water source; 710 served per SDWIS.
- 710
- People served (this PWS)
- 52
- EPA violations (this PWS)
- 19
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Lake Andes standing, mid SDWIS violation third
37% of 52 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 37% is upper-third health share (> 23%). Population rank #24,124 of 29,740 among systems serving 500+.
The verdict
Lake Andes lands in the middle third by violation volume (52), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (710; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 37% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #24,124 of 29,740
- Population · /systems
- #135 of 171
- Population · SD
- 52
- Total EPA violations on record
- 37%
- 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
- 353
- County
- Charles Mix
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 18
- Treatment Tech Violations
- 19
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 7 | 2009 |
| Lead and Copper Rule | MR | 6 | 2000 |
| Lead and Copper Rule | TT | 4 | 2010 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 4 | 2019 |
| Revised Total Coliform Rule | MON | 3 | 2022 |
| Acrylamide | TT | 3 | 1995 |
| Epichlorohydrin | TT | 3 | 1995 |
| Surface Water Treatment Rule | TT | 3 | 1997 |
| Coliform (TCR) | MR | 3 | 2003 |
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 2 | 2020 |
| Lead and Copper Rule | Other | 2 | 2001 |
| Nitrate | MR | 2 | 1993 |
| Chlorine | MR | 2 | 2022 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
Violation Count vs. the National Corpus
Lake Andes has 52 recorded EPA violations, 57% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 42% carry more. 37% of this system's own violations are health-based (19 of 52), and it ranks #24,124 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)
52 Around the middle fewer violations than 42% 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 Andes
19 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for SD4600185.
Sources: EPA SDWIS
Nationwide peers
52 violations · 710 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 Lake Andes
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.