Public water system record
Frontier Estates
Serves Murphy and Manchester, Jefferson County and St. Louis County, MO · 120 people served
Federal records show 2 health-based violations and 1 monitoring/reporting issue for Frontier Estates in the last ten years. The most serious issue in this window was a resolved Combined Radium (-226 and -228) violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- Frontier Estates draws water from 1 well.
- Highest measured level in the last 10 years: Combined Radium (-226 and -228), 5.68 pCi/L, federal limit 5 pCi/L (1.1 times the limit), 2023.
- Most recent formal enforcement: signed compliance agreement by Missouri, June 2002.
- Record on file since 1981, with 13 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 38 unknown out of 48 service lines.
Check whether Frontier Estates 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 5.68 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Jul 1, 2023 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Sep 19, 2015 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2020 | Resolved |
Full record since 1981
EPA's records for Frontier Estates go back to 1981. Before October 19, 2016 they list 13 health-based violations (12 resolved, 1 archived by EPA without a recorded fix) and 96 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 1 | 0 |
| 1990s | 3 | 78 |
| 2000s | 8 | 14 |
| 2010 to October 18, 2016 | 1 | 4 |
| 2020s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Groundwater Rule, began September 2015, Resolved.
Show all 13 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
Sep 19, 2015 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2001 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2001 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2001 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1991 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Dec 22, 1981 | Archived |
Enforcement actions
Missouri regulators took 2 formal enforcement actions against Frontier Estates between 2001 and 2002. The most recent was a signed compliance agreement in June 2002.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 26, 2002 | Missouri | Signed compliance agreement | 9 violations (7 health-based): Total Coliform |
| Aug 8, 2001 | Missouri | Signed compliance agreement | 2 violations: Nitrate-Nitrite |
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.
Groundwater Rule
1 incidentThe 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 this violation.
Where the water comes from
Frontier Estates draws water from 1 well.
Annual water quality report
Frontier Estates 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 Frontier Estates 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