Public water system record
Town of Johnstown
Serves Johnstown, Weld County and Larimer County, CO · 27,295 people served
Federal records show 2 health-based violations and 36 monitoring/reporting issues for Town of Johnstown in the last ten years. The most serious issue in this window was a resolved Surface Water Treatment Rule violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 36
Key facts
- Town of Johnstown draws water from 3 surface water intakes.
- Record on file since 2003, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 494 unknown out of 6,990 service lines.
Check whether Town of Johnstown 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 |
|---|---|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jul 1, 2021 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jul 1, 2020 | 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, 2023 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Aug 1, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2021 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2021 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2020 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2020 | Resolved |
|
Public Notice
OTHER
|
Jan 6, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Revised Total Coliform Rule
OTHER
|
Dec 6, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Sep 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Aug 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Fluoride
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Selenium
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Nickel
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
Full record since 2003
EPA's records for Town of Johnstown go back to 2003. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 51 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 4 | 41 |
| 2010 to October 18, 2016 | 0 | 10 |
| October 19, 2016 to 2019 | 0 | 27 |
| 2020s | 2 | 9 |
Most recent health-based violation before October 19, 2016: CARBON, TOTAL, began October 2005, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2005 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2005 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2005 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 2005 | Resolved |
What the violations mean
Surface Water Treatment Rule
1 incidentThe system did not complete a treatment step or action that the Surface Water Treatment Rule requires (a treatment technique violation).
The utility had to notify customers about this violation.
CARBON, TOTAL
1 incidentThe system did not complete a treatment step or action that federal rules require for CARBON, TOTAL (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
Town of Johnstown draws water from 3 surface water intakes. It also has emergency connections to Little Thompson WD, City of Greeley and Central Weld Cnty WD. 1 other community water system buys water from Town of Johnstown.
Emergency or part-time connections to
- Little Thompson WD Berthoud, CO
- City of Greeley Greeley, CO
- Central Weld Cnty WD Greeley, CO
Community systems that buy water from it
- Paradise Village Coop Mobile Home Park Greeley, CO
Annual water quality report
Town of Johnstown 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 Colorado.
Certified drinking water labs by state EPA guidance for private wells