Public water system record
Lake Durango WA
Serves an area of La Plata County, CO · 1,577 people served
Federal records show 6 health-based violations and 17 monitoring/reporting issues for Lake Durango WA in the last ten years. The most serious issue in this window was a resolved Stage 1 Disinfection Byproducts Rule violation.
System profile
- Health-based violations, last 10 years
- 6
- Resolved
- 6
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 17
Key facts
- Lake Durango WA draws water from 1 surface water intake.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2018.
- Most recent formal enforcement: compliance order (no penalty) by Colorado, February 2019.
- Record on file since 1993, with 12 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 657 service lines.
Check whether Lake Durango WA 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 |
|---|---|---|---|---|
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | Jun 1, 2022 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Oct 1, 2018 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2018 | Resolved | Yes |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jul 1, 2018 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Apr 1, 2018 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jan 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
|
Jul 8, 2022 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Chlorite
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
|
Chlorite
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Sep 10, 2019 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 24, 2019 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 14, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Chlorine dioxide
Monitoring and reporting
|
Sep 1, 2018 | Resolved |
|
Chlorite
Monitoring and reporting
|
Sep 1, 2018 | Resolved |
|
Chlorine dioxide
Monitoring and reporting
|
Aug 1, 2018 | Resolved |
|
Chlorite
Monitoring and reporting
|
Aug 1, 2018 | Resolved |
|
Chlorine dioxide
Monitoring and reporting
|
Jul 1, 2018 | Resolved |
|
Chlorite
Monitoring and reporting
|
Jul 1, 2018 | Resolved |
|
Chlorite
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
Full record since 1993
EPA's records for Lake Durango WA go back to 1993. Before October 19, 2016 they list 12 health-based violations (12 resolved) and 19 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 3 |
| 2000s | 9 | 5 |
| 2010 to October 18, 2016 | 3 | 11 |
| October 19, 2016 to 2019 | 5 | 13 |
| 2020s | 1 | 4 |
Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began July 2015, Resolved.
Show all 12 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Jul 1, 2015 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jul 1, 2012 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jun 1, 2011 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Feb 1, 2009 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Aug 1, 2007 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Aug 1, 2007 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2006 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2005 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Apr 1, 2004 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 2004 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Dec 1, 2001 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 2001 | Resolved |
Enforcement actions
Colorado regulators took 1 formal enforcement action against Lake Durango WA and issued 1 boil water order between 2012 and 2019. The most recent was a compliance order (no penalty) in February 2019.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Feb 26, 2019 | Colorado | Compliance order (no penalty) | 4 violations (4 health-based): Total Trihalomethanes (TTHMs) |
| Jul 11, 2012 | Colorado | Boil water order | 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule |
What the violations mean
Total Trihalomethanes (TTHMs)
4 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Stage 1 Disinfection Byproducts Rule
1 incidentThe 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
Interim Enhanced Surface Water Treatment Rule
1 incidentThe system did not meet a filtration or treatment requirement for surface water
Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through
Where the water comes from
Lake Durango WA draws water from 1 surface water intake. 4 other community water systems buy water from Lake Durango WA.
Community systems that buy water from it
- Durango West MD No 1 Durango, CO
- Durango West MD No 2 Durango, CO
- La Plata West Water Authority Hesperus, CO
- Laplata Vista Estates HOA Durango, CO
Annual water quality report
Lake Durango WA 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 Colorado.
Certified drinking water labs by state EPA guidance for private wells