Public water system record
Town of Larkspur
Serves Larkspur, Douglas County, CO · 275 people served
Federal records show 8 health-based violations and 31 monitoring/reporting issues for Town of Larkspur 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
- 8
- Resolved
- 8
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 31
Key facts
- Town of Larkspur draws water from 3 wells.
- Highest measured level in the last 10 years: Combined Radium (-226 and -228), 7 pCi/L, federal limit 5 pCi/L (1.4 times the limit), 2019.
- Most recent formal enforcement: compliance order (no penalty) by Colorado, June 2023.
- Record on file since 1997, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 109 service lines.
Check whether Town of Larkspur 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 6.05 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 5.88 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Jul 1, 2023 | Resolved | No |
|
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, 2023 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.25 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
340 | Jan 1, 2023 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 7 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
|
340 | Jan 1, 2019 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.6 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
340 | Oct 1, 2018 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.8 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
|
340 | Jul 1, 2018 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.8 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
|
340 | Apr 1, 2018 | 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
|
Feb 4, 2024 | Resolved |
|
Public Notice
OTHER
|
Apr 16, 2023 | Resolved |
|
Styrene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Jun 23, 2020 | Resolved |
|
Public Notice
OTHER
|
Mar 23, 2020 | Resolved |
|
Public Notice
OTHER
|
Jan 24, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2018 | Resolved |
|
Public Notice
OTHER
|
Apr 28, 2018 | Resolved |
|
Public Notice
OTHER
|
May 28, 2017 | Resolved |
Full record since 1997
EPA's records for Town of Larkspur go back to 1997. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 2 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 0 |
| 2000s | 2 | 1 |
| 2010 to October 18, 2016 | 0 | 1 |
| October 19, 2016 to 2019 | 4 | 5 |
| 2020s | 4 | 26 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began April 2007, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.1 pCi/L, federal limit 5 pCi/L (at or just above the limit)
|
Apr 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.3 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Jan 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
Jan 1, 1997 | Resolved |
Enforcement actions
Colorado regulators took 2 formal enforcement actions against Town of Larkspur between 2019 and 2023. The most recent was a compliance order (no penalty) in June 2023.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 28, 2023 | Colorado | Compliance order (no penalty) | 3 violations (3 health-based): Combined Radium (-226 and -228) |
| Jun 26, 2019 | Colorado | Compliance order (no penalty) | 4 violations (4 health-based): Combined Radium (-226 and -228) |
What the violations mean
Combined Radium (-226 and -228)
8 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.
Where the water comes from
Town of Larkspur draws water from 3 wells.
Annual water quality report
Town of Larkspur 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 Town of Larkspur 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 Colorado.
Certified drinking water labs by state EPA guidance for private wells