Community Water System · PWS MS0140010
Town of Lyon
Operator location Lyon, Mississippi - 23% of 427 violations are health-based (upper-third health share (> 23%)); groundwater source; 270 served per SDWIS.
- 270
- People served (this PWS)
- 427
- EPA violations (this PWS)
- 99
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Town of Lyon standing, high SDWIS violation third
23% of 427 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 23% is upper-third health share (> 23%).
The verdict
Town of Lyon sits in the upper third of the sitemap cohort by violation count (427), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (270; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 23% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 427
- Total EPA violations on record
- 23%
- Health-based (MCL / treatment failure)
- 270
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
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
- 176
- County
- Coahoma
- School/Daycare
- No
- MCL Violations
- 97
- Monitoring Violations
- 307
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 97 | 2017 |
| Combined Uranium | MR | 78 | 2012 |
| Radium-226 | MR | 54 | 2012 |
| Radium-228 | MR | 54 | 2012 |
| Combined Radium (-226 and -228) | MR | 28 | 2008 |
| Gross Alpha, Excl. Radon and U | MR | 28 | 2008 |
| TTHM | MR | 19 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 19 | 2024 |
| Consumer Confidence Rule | Other | 12 | 2024 |
| Nitrate-Nitrite | MR | 9 | 2024 |
| Nitrate | MR | 9 | 2024 |
| Nitrite | MR | 9 | 2024 |
| Public Notice | Other | 5 | 2023 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
Violation Count vs. the National Corpus
Town of Lyon has 427 recorded EPA violations, 94% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 6% carry more. 23% of this system's own violations are health-based (99 of 427), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
427 Higher than most more violations than 94% 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 Town of Lyon
99 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MS0140010.
Sources: EPA SDWIS
Nationwide peers
427 violations · 270 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.
What to do with Town of Lyon
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Mississippi compares on the same EPA violation measures. Mississippi 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.