Public water system record
Silex PWS
Serves Silex and Eolia, Lincoln County and Pike County, MO · 206 people served
Federal records show 27 health-based violations and 16 monitoring/reporting issues for Silex PWS in the last ten years. The most serious issue in this window was a resolved Combined Radium (-226 and -228) violation.
System profile
Source water
Purchased surface water
ZIP
63377
EPA system ID
MO6010902
- Health-based violations, last 10 years
- 27
- Resolved
- 27
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 16
Key facts
- Silex PWS buys its water from Pike County PWSD 1.
- Highest measured level in the last 10 years: Combined Radium (-226 and -228), 6.58 pCi/L, federal limit 5 pCi/L (1.3 times the limit), 2024.
- Most recent formal enforcement: compliance order with a penalty by Missouri, May 2024.
- Record on file since 1991, with 25 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 86 unknown out of 86 service lines.
Check whether Silex PWS serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.58 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
340 | Apr 1, 2024 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.2 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Jan 1, 2024 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.2 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Oct 1, 2023 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.5 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Jul 1, 2023 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.8 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Apr 1, 2023 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.55 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Jan 1, 2023 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.6 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Oct 1, 2022 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.75 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Jul 1, 2022 | Resolved | No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | Apr 26, 2022 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.87 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Apr 1, 2022 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.2 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Jan 1, 2022 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.93 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Oct 1, 2021 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.63 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Jul 1, 2021 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.5 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Apr 1, 2021 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 13, 2021 | Resolved | No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | Feb 4, 2020 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.83 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Jul 1, 2018 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.85 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Apr 1, 2018 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.6 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Jan 1, 2018 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.85 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Oct 1, 2017 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Aug 6, 2017 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.58 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Apr 1, 2017 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.78 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Jan 1, 2017 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.63 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Oct 1, 2016 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.83 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Jul 1, 2016 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.63 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Apr 1, 2016 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.4 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
340 | Jan 1, 2016 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Apr 23, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
May 1, 2023 | Resolved |
|
Public Notice
OTHER
|
Dec 3, 2022 | Resolved |
|
E. coli
Monitoring and reporting
|
Nov 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2022 | Resolved |
|
Radium-228
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Radium-226
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Apr 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Nov 2, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2020 | Resolved |
|
Public Notice
OTHER
|
Jul 11, 2019 | Resolved |
|
Public Notice
OTHER
|
Apr 2, 2019 | Resolved |
|
Public Notice
OTHER
|
Jul 18, 2017 | Resolved |
Full record since 1991
EPA's records for Silex PWS go back to 1991. Before October 19, 2016 they list 25 health-based violations (25 resolved) and 39 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 14 |
| 2000s | 0 | 11 |
| 2010 to October 18, 2016 | 24 | 14 |
| October 19, 2016 to 2019 | 7 | 3 |
| 2020s | 16 | 13 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began October 2016, Resolved.
Show all 25 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.63 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Oct 1, 2016 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.83 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Jul 1, 2016 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.63 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Apr 1, 2016 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.4 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
Jan 1, 2016 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.75 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
|
Oct 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.58 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
Jul 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.55 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
Apr 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.65 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Jan 1, 2015 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 15.78 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Jan 1, 2015 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 15.75 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Jul 1, 2014 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16.43 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Apr 1, 2014 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.7 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Oct 1, 2013 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.95 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Jul 1, 2013 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.13 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Apr 1, 2013 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.05 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Jan 1, 2013 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.05 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Oct 1, 2012 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16.38 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Oct 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.53 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Jul 1, 2012 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16.53 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Jul 1, 2012 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 15.87 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Apr 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.9 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Jan 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.5 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Oct 1, 2011 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.93 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Jul 1, 2011 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.28 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
Apr 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1991 | Resolved |
Enforcement actions
Missouri regulators took 3 formal enforcement actions against Silex PWS between 2014 and 2024. The most recent was a compliance order with a penalty in May 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 17, 2024 | Missouri | Compliance order with a penalty | 23 violations (20 health-based): Combined Radium (-226 and -228), Public Notice, Stage 1 Disinfection Byproducts Rule |
| Mar 30, 2018 | Missouri | Compliance order (no penalty) | 43 violations (37 health-based): Combined Radium (-226 and -228), Gross Alpha, Excl. Radon and U, Groundwater Rule, Combined Uranium, Radium-226 |
| Aug 15, 2014 | Missouri | Compliance order with a penalty | 28 violations (19 health-based): Combined Radium (-226 and -228), Public Notice, Total Coliform, Gross Alpha, Excl. Radon and U, Consumer Confidence Rule |
What the violations mean
Combined Radium (-226 and -228)
23 incidentsTest results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about each of these violations.
Stage 1 Disinfection Byproducts Rule
2 incidentsThe system did not meet a treatment requirement of the Stage 1 Disinfectants and Disinfection Byproducts Rule
Byproducts form when disinfectants react with natural material in water. Long-term exposure above federal limits may increase cancer risk
Groundwater Rule
2 incidentsThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Silex PWS buys its water from Pike County PWSD 1. It lists no wells or intakes of its own.
Buys water from
- Pike County PWSD 1 Bowling Green, MO
Annual water quality report
Silex PWS must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Silex PWS for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Missouri.
Certified drinking water labs by state EPA guidance for private wells