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Public water system record

Eureka WC

Serves an area of Otero County, CO · 498 people served

Federal records show 66 health-based violations and 89 monitoring/reporting issues for Eureka WC in the last ten years, including an unresolved Lead and Copper Rule violation.

  • CO0145150
  • ROCKY FORD
  • CO
  • 498 served

System profile

Source water Groundwater
ZIP 81067
EPA system ID CO0145150

Verify this system on EPA ECHO →

Health-based violations, last 10 years
66
Resolved
2
Unresolved
1
Archived by EPA
63
Any acute record
No
Monitoring issues, last 10 years
89

Key facts

  • Eureka WC draws water from 3 wells.
  • Highest measured level in the last 10 years: Combined Radium (-226 and -228), 22.29 pCi/L, federal limit 5 pCi/L (4.5 times the limit), 2021.
  • Most recent formal enforcement: compliance order with a penalty by Colorado, June 2024.
  • Record on file since 1991, with 20 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 145 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 23 pCi/L, federal limit 15 pCi/L (1.5 times the limit)
 340 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 340 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
 340 Jul 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 340 Jul 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 21 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
 340 Apr 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 20 pCi/L, federal limit 5 pCi/L (4 times the limit)
 340 Apr 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Lead and Copper Rule
Treatment technique failure
 350 Apr 1, 2025 Active No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 24.9 pCi/L, federal limit 15 pCi/L (1.7 times the limit)
 340 Jan 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 19.4 pCi/L, federal limit 5 pCi/L (3.9 times the limit)
 340 Jan 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Lead and Copper Rule
Treatment technique failure
 350 Dec 1, 2024 Resolved No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 27.33 pCi/L, federal limit 15 pCi/L (1.8 times the limit)
 340 Oct 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 19.47 pCi/L, federal limit 5 pCi/L (3.9 times the limit)
 340 Oct 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 27.9 pCi/L, federal limit 15 pCi/L (1.9 times the limit)
 340 Jul 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18.9 pCi/L, federal limit 5 pCi/L (3.8 times the limit)
 340 Jul 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18.15 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 340 Apr 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 24.4 pCi/L, federal limit 15 pCi/L (1.6 times the limit)
 340 Apr 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
 210 Feb 1, 2024 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 17.9 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 340 Jan 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 26.9 pCi/L, federal limit 15 pCi/L (1.8 times the limit)
 340 Jan 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18.1 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 340 Oct 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 29.6 pCi/L, federal limit 15 pCi/L (2 times the limit)
 340 Oct 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 17.83 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 340 Jul 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 28.27 pCi/L, federal limit 15 pCi/L (1.9 times the limit)
 340 Jul 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18.1 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 340 Apr 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 28.6 pCi/L, federal limit 15 pCi/L (1.9 times the limit)
 340 Apr 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18.1 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 340 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 28.6 pCi/L, federal limit 15 pCi/L (1.9 times the limit)
 340 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 21 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
 340 Oct 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 340 Oct 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 19 pCi/L, federal limit 5 pCi/L (3.8 times the limit)
 340 Jul 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 20 pCi/L, federal limit 5 pCi/L (4 times the limit)
 340 Apr 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21 pCi/L, federal limit 5 pCi/L (4.2 times the limit)
 340 Jan 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 22.29 pCi/L, federal limit 5 pCi/L (4.5 times the limit)
 340 Oct 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
 340 Jul 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 22 pCi/L, federal limit 5 pCi/L (4.4 times the limit)
 340 Jul 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 22 pCi/L, federal limit 15 pCi/L (1.5 times the limit)
 340 Apr 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21 pCi/L, federal limit 5 pCi/L (4.2 times the limit)
 340 Apr 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 24.25 pCi/L, federal limit 15 pCi/L (1.6 times the limit)
 340 Jan 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 20.7 pCi/L, federal limit 5 pCi/L (4.1 times the limit)
 340 Jan 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 28.5 pCi/L, federal limit 15 pCi/L (1.9 times the limit)
 340 Oct 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21.2 pCi/L, federal limit 5 pCi/L (4.2 times the limit)
 340 Oct 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 29 pCi/L, federal limit 15 pCi/L (1.9 times the limit)
 340 Jul 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21.5 pCi/L, federal limit 5 pCi/L (4.3 times the limit)
 340 Jul 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21.8 pCi/L, federal limit 5 pCi/L (4.4 times the limit)
 340 Apr 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 29.5 pCi/L, federal limit 15 pCi/L (2 times the limit)
 340 Apr 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21.55 pCi/L, federal limit 5 pCi/L (4.3 times the limit)
 340 Jan 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 27.25 pCi/L, federal limit 15 pCi/L (1.8 times the limit)
 340 Jan 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 25 pCi/L, federal limit 15 pCi/L (1.7 times the limit)
 340 Oct 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21.3 pCi/L, federal limit 5 pCi/L (4.3 times the limit)
 340 Oct 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 27 pCi/L, federal limit 15 pCi/L (1.8 times the limit)
 340 Jul 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21.15 pCi/L, federal limit 5 pCi/L (4.2 times the limit)
 340 Jul 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 21 pCi/L, federal limit 5 pCi/L (4.2 times the limit)
 340 Apr 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 29 pCi/L, federal limit 15 pCi/L (1.9 times the limit)
 340 Apr 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 20.75 pCi/L, federal limit 5 pCi/L (4.2 times the limit)
 340 Jan 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 29.25 pCi/L, federal limit 15 pCi/L (2 times the limit)
 340 Jan 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 20.5 pCi/L, federal limit 5 pCi/L (4.1 times the limit)
 340 Oct 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 29.5 pCi/L, federal limit 15 pCi/L (2 times the limit)
 340 Oct 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 20.67 pCi/L, federal limit 5 pCi/L (4.1 times the limit)
 340 Jul 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 27.67 pCi/L, federal limit 15 pCi/L (1.8 times the limit)
 340 Jul 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 20.67 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
 340 Apr 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 20 pCi/L, federal limit 5 pCi/L (4 times the limit)
 340 Apr 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 19 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
 340 Jan 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 19.5 pCi/L, federal limit 5 pCi/L (3.9 times the limit)
 340 Jan 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 340 Jan 1, 2017 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 17.5 pCi/L, federal limit 5 pCi/L (3.5 times the limit)
 340 Jan 1, 2016 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
 340 Jan 1, 2016 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Public Notice
OTHER
 Jan 18, 2026 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2026 Resolved
Revised Total Coliform Rule
Monitoring violation
 Dec 1, 2025 Resolved
Revised Total Coliform Rule
Monitoring violation
 Nov 1, 2025 Resolved
Public Notice
OTHER
 Oct 20, 2025 Resolved
Chlorine
Monitoring and reporting
 Oct 1, 2025 Resolved
Public Notice
OTHER
 Oct 1, 2025 Resolved
Lead and Copper Rule
Monitoring and reporting
 Oct 1, 2025 Active
Public Notice
OTHER
 Aug 11, 2025 Resolved
Public Notice
OTHER
 Jul 22, 2025 Resolved
Public Notice
OTHER
 Jul 1, 2025 Resolved
Public Notice
OTHER
 May 23, 2025 Resolved
Combined Uranium
Monitoring and reporting
 Apr 1, 2025 Resolved
Gross Alpha, Excl. Radon and U
Monitoring and reporting
 Apr 1, 2025 Resolved
Combined Radium (-226 and -228)
Monitoring and reporting
 Apr 1, 2025 Resolved
Lead and Copper Rule
Monitoring and reporting
 Apr 1, 2025 Resolved
Public Notice
OTHER
 Apr 1, 2025 Resolved
Public Notice
OTHER
 Jan 31, 2025 Resolved
Lead and Copper Rule
Monitoring and reporting
 Dec 1, 2024 Resolved
Combined Radium (-226 and -228)
Monitoring and reporting
 Oct 1, 2024 Resolved
Combined Uranium
Monitoring and reporting
 Oct 1, 2024 Resolved
Gross Alpha, Excl. Radon and U
Monitoring and reporting
 Oct 1, 2024 Resolved
Public Notice
OTHER
 Oct 1, 2024 Resolved
Combined Uranium
Monitoring and reporting
 Jul 1, 2024 Resolved
Gross Alpha, Excl. Radon and U
Monitoring and reporting
 Jul 1, 2024 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2024 Resolved
Public Notice
OTHER
 Mar 7, 2024 Resolved
Nitrate
Monitoring and reporting
 Jan 1, 2024 Resolved
Public Notice
OTHER
 Jan 1, 2024 Resolved
Combined Uranium
Monitoring and reporting
 Oct 1, 2023 Resolved
Combined Radium (-226 and -228)
Monitoring and reporting
 Oct 1, 2023 Resolved
Gross Alpha, Excl. Radon and U
Monitoring and reporting
 Oct 1, 2023 Resolved
Public Notice
OTHER
 Oct 1, 2023 Resolved
Combined Uranium
Monitoring and reporting
 Jul 1, 2023 Resolved
Combined Radium (-226 and -228)
Monitoring and reporting
 Jul 1, 2023 Resolved
Gross Alpha, Excl. Radon and U
Monitoring and reporting
 Jul 1, 2023 Resolved
Public Notice
OTHER
 Apr 1, 2023 Resolved
Chlordane
Monitoring and reporting
 Jan 1, 2023 Resolved
ETHYLENE DIBROMIDE
Monitoring and reporting
 Jan 1, 2023 Resolved
1,2-DIBROMO-3-CHLOROPROPANE
Monitoring and reporting
 Jan 1, 2023 Resolved
Total Polychlorinated Biphenyls (PCB)
Monitoring and reporting
 Jan 1, 2023 Resolved
Pentachlorophenol
Monitoring and reporting
 Jan 1, 2023 Resolved
Benzo(a)pyrene
Monitoring and reporting
 Jan 1, 2023 Resolved
HEXACHLOROBENZENE
Monitoring and reporting
 Jan 1, 2023 Resolved
2,4,5-TP
Monitoring and reporting
 Jan 1, 2023 Resolved
2,4-D
Monitoring and reporting
 Jan 1, 2023 Resolved
Heptachlor epoxide
Monitoring and reporting
 Jan 1, 2023 Resolved
Heptachlor
Monitoring and reporting
 Jan 1, 2023 Resolved
LASSO
Monitoring and reporting
 Jan 1, 2023 Resolved
Atrazine
Monitoring and reporting
 Jan 1, 2023 Resolved
Carbofuran
Monitoring and reporting
 Jan 1, 2023 Resolved
Hexachlorocyclopentadiene
Monitoring and reporting
 Jan 1, 2023 Resolved
Dinoseb
Monitoring and reporting
 Jan 1, 2023 Resolved
Picloram
Monitoring and reporting
 Jan 1, 2023 Resolved
Di(2-ethylhexyl) phthalate
Monitoring and reporting
 Jan 1, 2023 Resolved
Simazine
Monitoring and reporting
 Jan 1, 2023 Resolved
OXAMYL
Monitoring and reporting
 Jan 1, 2023 Resolved
Di(2-ethylhexyl) adipate
Monitoring and reporting
 Jan 1, 2023 Resolved
Endothall
Monitoring and reporting
 Jan 1, 2023 Resolved
Diquat
Monitoring and reporting
 Jan 1, 2023 Resolved
Dalapon
Monitoring and reporting
 Jan 1, 2023 Resolved
Toxaphene
Monitoring and reporting
 Jan 1, 2023 Resolved
Methoxychlor
Monitoring and reporting
 Jan 1, 2023 Resolved
BHC-GAMMA
Monitoring and reporting
 Jan 1, 2023 Resolved
Endrin
Monitoring and reporting
 Jan 1, 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
Public Notice
OTHER
 Jan 1, 2023 Resolved
Public Notice
OTHER
 Oct 1, 2022 Resolved
Public Notice
OTHER
 Jul 1, 2022 Resolved

Full record since 1991

EPA's records for Eureka WC go back to 1991. Before October 19, 2016 they list 20 health-based violations (20 archived by EPA without a recorded fix) and 20 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 2 7
2000s 4 3
2010 to October 18, 2016 14 10
October 19, 2016 to 2019 17 0
2020s 47 89

Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began January 2016, Archived.

Show all 20 health-based violations before October 19, 2016
Contaminant Start date Status
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 17.5 pCi/L, federal limit 5 pCi/L (3.5 times the limit)
 Jan 1, 2016 Archived
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
 Jan 1, 2016 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18.3 pCi/L, federal limit 5 pCi/L (3.7 times the limit)
 Jan 1, 2015 Archived
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 23 pCi/L, federal limit 15 pCi/L (1.5 times the limit)
 Jan 1, 2015 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 15 pCi/L, federal limit 5 pCi/L (3 times the limit)
 Jan 1, 2014 Archived
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 21 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
 Jan 1, 2014 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 Jan 1, 2013 Archived
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 27 pCi/L, federal limit 15 pCi/L (1.8 times the limit)
 Jan 1, 2013 Archived
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 26 pCi/L, federal limit 15 pCi/L (1.7 times the limit)
 Jan 1, 2012 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
 Jan 1, 2012 Archived
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
 Jan 1, 2011 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
 Jan 1, 2011 Archived
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
 Jan 1, 2010 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
 Jan 1, 2010 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 14 pCi/L, federal limit 5 pCi/L (2.8 times the limit)
 Jan 1, 2009 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 5 pCi/L (3.6 times the limit)
 Jan 1, 2008 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 15 pCi/L, federal limit 5 pCi/L (3 times the limit)
 Jan 1, 2007 Archived
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 41 pCi/L, federal limit 15 pCi/L (2.7 times the limit)
 Jan 1, 2007 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 19 pCi/L, federal limit 5 pCi/L (3.8 times the limit)
 Jan 1, 1994 Archived
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 26 pCi/L, federal limit 15 pCi/L (1.7 times the limit)
 Jan 1, 1994 Archived

Enforcement actions

Colorado regulators took 4 formal enforcement actions against Eureka WC between 2000 and 2024. The most recent was a compliance order with a penalty in June 2024.

Date By Action Violations covered
Jun 28, 2024 Colorado Compliance order with a penalty 1 violation (1 health-based): Stage 1 Disinfection Byproducts Rule
May 31, 2022 Colorado Compliance order (no penalty) 83 violations (81 health-based): Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228), Combined Uranium
Jan 2, 2018 Colorado Compliance order (no penalty) 32 violations (32 health-based): Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228)
Mar 28, 2000 Colorado Compliance order (no penalty) 20 violations (20 health-based): Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228)

What the violations mean

Combined Radium (-226 and -228)

34 incidents

Test 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.

Gross Alpha, Excl. Radon and U

29 incidents

Test results for Gross Alpha, Excl. Radon and U were above the federal limit (a maximum contaminant level violation).

The utility had to notify customers about each of these violations.

Lead and Copper Rule

2 incidents

The system did not complete a treatment step or action that the Lead and Copper Rule requires (a treatment technique violation).

The utility had to notify customers about each of these violations.

Stage 1 Disinfection Byproducts Rule

1 incident

The 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

Where the water comes from

Eureka WC draws water from 3 wells.

Annual water quality report

Eureka WC 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 Eureka WC 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