Public water system record
Boone County PWSD 9
Serves an area of Boone County and Callaway County, MO that includes Columbia · 15,035 people served
Federal records show no health-based violations and 3 monitoring/reporting issues for Boone County PWSD 9 in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- Boone County PWSD 9 draws water from 6 wells.
- Record on file since 1994, with 30 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 1,454 unknown out of 7,081 service lines.
Check whether Boone County PWSD 9 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
RPT
|
Aug 1, 2025 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Sep 1, 2024 | Resolved |
|
E. coli
Monitoring and reporting
|
Sep 1, 2021 | Resolved |
Full record since 1994
EPA's records for Boone County PWSD 9 go back to 1994. Before October 19, 2016 they list 30 health-based violations (30 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 1 |
| 2000s | 30 | 0 |
| 2020s | 0 | 3 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began October 2005, Resolved.
Show all 30 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8 pCi/L, federal limit 5 pCi/L (1.6 times the limit)
|
Oct 1, 2005 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 25.1 pCi/L, federal limit 15 pCi/L (1.7 times the limit)
|
Oct 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 7.15 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
|
Jul 1, 2005 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 21.92 pCi/L, federal limit 15 pCi/L (1.5 times the limit)
|
Jul 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.7 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
Apr 1, 2005 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 23.5 pCi/L, federal limit 15 pCi/L (1.6 times the limit)
|
Apr 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Oct 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 2004 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jul 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jul 1, 2004 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Apr 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Apr 1, 2004 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jan 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 2004 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Oct 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 2003 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jul 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jul 1, 2003 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Apr 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Apr 1, 2003 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jan 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 2003 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Oct 1, 2002 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 2002 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jul 1, 2002 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jul 1, 2002 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Apr 1, 2002 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Apr 1, 2002 | Resolved |
Where the water comes from
Boone County PWSD 9 draws water from 6 wells. It also has emergency connections to Boone County PWSD 4, City of Columbia Utilities and Callaway 2 Water District. 1 other public water system has an emergency connection to Boone County PWSD 9.
Emergency or part-time connections to
- Boone County PWSD 4 Hallsville, MO
- City of Columbia Utilities Columbia, MO
- Callaway 2 Water District Fulton, MO
Annual water quality report
Boone County PWSD 9 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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