Public water system record
Terre Du Lac
Serves Terre du Lac, St. Francois County, MO · 3,200 people served
Federal records show 1 health-based violation and 7 monitoring/reporting issues for Terre Du Lac 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
Groundwater
ZIP
63131
EPA system ID
MO4036059
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 7
Key facts
- Terre Du Lac draws water from 4 wells (2 of them for emergency, seasonal or other part-time use).
- Highest measured level in the last 10 years: Combined Radium (-226 and -228), 10.4 pCi/L, federal limit 5 pCi/L (2.1 times the limit), 2016.
- Most recent formal enforcement: consent decree or court judgment by Missouri, May 2015.
- Record on file since 1980, with 87 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 846 unknown out of 1,432 service lines.
Check whether Terre Du Lac 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 10.4 pCi/L, federal limit 5 pCi/L (2.1 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 |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2020 | Resolved |
|
Public Notice
OTHER
|
Mar 5, 2017 | Resolved |
|
Public Notice
OTHER
|
Dec 7, 2016 | Resolved |
|
Groundwater Rule
OTHER
|
Mar 3, 2016 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2013 |
Active
Enforcement action in place
|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2012 | Active |
|
Public Notice
OTHER
|
Oct 1, 2010 |
Active
Enforcement action in place
|
Full record since 1980
EPA's records for Terre Du Lac go back to 1980. Before October 19, 2016 they list 87 health-based violations (84 resolved, 3 archived by EPA without a recorded fix) and 35 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 6 | 0 |
| 1990s | 2 | 1 |
| 2000s | 57 | 11 |
| 2010 to October 18, 2016 | 22 | 23 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began January 2016, Resolved.
Show all 87 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 10.4 pCi/L, federal limit 5 pCi/L (2.1 times the limit)
|
Jan 1, 2016 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8.88 pCi/L, federal limit 5 pCi/L (1.8 times the limit)
|
Oct 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8.43 pCi/L, federal limit 5 pCi/L (1.7 times the limit)
|
Jul 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8.05 pCi/L, federal limit 5 pCi/L (1.6 times the limit)
|
Apr 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.2 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Jan 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8.77 pCi/L, federal limit 5 pCi/L (1.8 times the limit)
|
Apr 1, 2012 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18.93 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
|
Apr 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 7 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
|
Jan 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8.07 pCi/L, federal limit 5 pCi/L (1.6 times the limit)
|
Oct 1, 2011 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 17 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Oct 1, 2011 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8.88 pCi/L, federal limit 5 pCi/L (1.8 times the limit)
|
Jul 1, 2011 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 17.13 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Jul 1, 2011 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8.05 pCi/L, federal limit 5 pCi/L (1.6 times the limit)
|
Apr 1, 2011 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18.28 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
|
Apr 1, 2011 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 7.1 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
|
Jan 1, 2011 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16.65 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Jan 1, 2011 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.93 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
|
Jul 1, 2010 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 17.4 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
|
Jul 1, 2010 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8.88 pCi/L, federal limit 5 pCi/L (1.8 times the limit)
|
Apr 1, 2010 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18.78 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
|
Apr 1, 2010 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 9.975 pCi/L, federal limit 5 pCi/L (2 times the limit)
|
Jan 1, 2010 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18.4 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
|
Jan 1, 2010 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 9.98 pCi/L, federal limit 5 pCi/L (2 times the limit)
|
Oct 1, 2009 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18.95 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
|
Oct 1, 2009 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11.1 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Jul 1, 2009 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18.5 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
|
Jul 1, 2009 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 9.53 pCi/L, federal limit 5 pCi/L (1.9 times the limit)
|
Apr 1, 2009 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16.28 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Apr 1, 2009 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 9.58 pCi/L, federal limit 5 pCi/L (1.9 times the limit)
|
Jan 1, 2009 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 17.4 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
|
Jan 1, 2009 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 10.83 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Oct 1, 2008 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18.8 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
|
Oct 1, 2008 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18.05 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
|
Jul 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 9.78 pCi/L, federal limit 5 pCi/L (2 times the limit)
|
Jul 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2008 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 10.55 pCi/L, federal limit 5 pCi/L (2.1 times the limit)
|
Apr 1, 2008 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 19.45 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
|
Apr 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11.1 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Jan 1, 2008 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 20.1 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
|
Jan 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 10.73 pCi/L, federal limit 5 pCi/L (2.1 times the limit)
|
Oct 1, 2007 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 19.93 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
|
Oct 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11.08 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Jul 1, 2007 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 20.45 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
|
Jul 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11.55 pCi/L, federal limit 5 pCi/L (2.3 times the limit)
|
Apr 1, 2007 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 21.03 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
|
Apr 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11.65 pCi/L, federal limit 5 pCi/L (2.3 times the limit)
|
Jan 1, 2007 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 21.48 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
|
Jan 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12.13 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Oct 1, 2006 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 20.7 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
|
Oct 1, 2006 | Resolved |
37 older violations are not listed here. EPA ECHO has the complete list.
Enforcement actions
Missouri regulators took 4 formal enforcement actions against Terre Du Lac between 2005 and 2015. The most recent was a consent decree or court judgment in May 2015.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 19, 2015 | Missouri | Consent decree or court judgment | 24 violations (13 health-based): Consumer Confidence Rule, Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228), Combined Uranium, Radium-228 |
| Aug 23, 2011 | Missouri | Compliance order with a penalty | 79 violations (67 health-based): Public Notice, Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228), Total Coliform, Consumer Confidence Rule |
| Nov 8, 2007 | Missouri | Signed compliance agreement | 27 violations (27 health-based): Combined Radium (-226 and -228), Gross Alpha, Excl. Radon and U |
| Dec 21, 2005 | Missouri | Signed compliance agreement | 28 violations (27 health-based): Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228) |
What the violations mean
Combined Radium (-226 and -228)
1 incidentTest results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about this violation.
Where the water comes from
Terre Du Lac draws water from 4 wells (2 of them for emergency, seasonal or other part-time use).
Annual water quality report
Terre Du Lac 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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