Public water system record
Epcor - Parker Dam
Serves Parker and Parker Strip, La Paz County, AZ · 429 people served
Federal records show 9 health-based violations and 27 monitoring/reporting issues for Epcor - Parker Dam 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
- 9
- Resolved
- 9
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 27
Key facts
- Epcor - Parker Dam draws water from 1 surface water intake.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2018.
- Record on file since 1982, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 209 service lines.
Check whether Epcor - Parker Dam 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 | Oct 1, 2020 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2020 | Resolved | Yes |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2020 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2020 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2020 | 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 0.088 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Apr 1, 2018 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jan 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 | Oct 1, 2017 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Jul 2, 2021 | Resolved |
|
Public Notice
OTHER
|
Jul 2, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Nov 10, 2020 | Resolved |
|
Public Notice
OTHER
|
Nov 10, 2020 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2020 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2020 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2020 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2020 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Feb 1, 2020 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Feb 1, 2020 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2020 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2020 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
E. coli
Monitoring and reporting
|
Oct 14, 2018 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Aug 1, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Aug 1, 2018 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Apr 1, 2018 | Resolved |
|
E. coli
Monitoring and reporting
|
Mar 4, 2018 | Resolved |
|
E. coli
Monitoring and reporting
|
Feb 18, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2018 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
Full record since 1982
EPA's records for Epcor - Parker Dam go back to 1982. Before October 19, 2016 they list 5 health-based violations (5 resolved) and 212 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 24 |
| 1990s | 1 | 90 |
| 2000s | 1 | 47 |
| 2010 to October 18, 2016 | 3 | 51 |
| October 19, 2016 to 2019 | 4 | 11 |
| 2020s | 5 | 16 |
Most recent health-based violation before October 19, 2016: Interim Enhanced Surface Water Treatment Rule (acute), began November 2015, Resolved.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Nov 1, 2015 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Oct 1, 2015 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Oct 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 2000 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 1992 | Resolved |
What the violations mean
Total Trihalomethanes (TTHMs)
4 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Surface Water Treatment Rule
3 incidentsThe 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 each of these violations.
Interim Enhanced Surface Water Treatment Rule
2 incidentsThe 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
Epcor - Parker Dam draws water from 1 surface water intake.
Annual water quality report
Epcor - Parker Dam 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 Epcor - Parker Dam 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 Arizona.
Certified drinking water labs by state EPA guidance for private wells