HOLLIS
Oklahoma — Community Water System — PWSID: OK2002901
System Information
| PWSID | OK2002901 |
| System Name | HOLLIS |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 06 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 11, 1980 |
| Last Reported | Nov 14, 2025 |
Location & Contact
| State | Oklahoma |
| City | HOLLIS |
| ZIP Code | 73550 |
| Address | Kendall Williams, Mayor |
| Organization | HOLLIS |
| Phone | 580-688-9245 |
Population & Service
| Population Served | 2,264 |
| Service Connections | 957 |
Drinking Water Violations (983)
This water system has 983 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2024 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Unaddressed | — | Lead and Copper Rule |
| Oct 1, 2024 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Unaddressed | — | Lead and Copper Rule |
| Oct 1, 2024 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Unaddressed | — | Lead and Copper Rule |
| Jul 1, 2024 | Sep 30, 2024 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Sep 30, 2024 | Nitrate Rule |
| Jul 1, 2024 | Sep 30, 2024 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Sep 30, 2024 | Nitrate Rule |
| Jul 1, 2024 | Sep 30, 2024 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Sep 30, 2024 | Nitrate Rule |
| Jul 1, 2024 | Sep 30, 2024 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Sep 30, 2024 | Nitrate Rule |
| Oct 1, 2022 | Sep 30, 2023 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2022 | Sep 30, 2023 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2022 | Sep 30, 2023 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2022 | Sep 30, 2023 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2022 | Sep 30, 2023 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2022 | Sep 30, 2023 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2022 | Sep 30, 2023 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2022 | Sep 30, 2023 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2020 | Sep 30, 2020 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Sep 30, 2020 | Nitrate Rule |
| Jul 1, 2020 | Sep 30, 2020 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Sep 30, 2020 | Nitrate Rule |
| Jul 1, 2020 | Sep 30, 2020 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Sep 30, 2020 | Nitrate Rule |
| Oct 1, 2018 | Dec 31, 2018 | Nitrate-Nitrite | MCL | Yes | No | 11 MG/L | — | 10 | Resolved | Dec 31, 2018 | Nitrate Rule |
| Oct 1, 2018 | Dec 31, 2018 | Nitrate-Nitrite | MCL | Yes | No | 11 MG/L | — | 10 | Resolved | Dec 31, 2018 | Nitrate Rule |
| Oct 1, 2018 | Dec 31, 2018 | Nitrate-Nitrite | MCL | Yes | No | 11 MG/L | — | 10 | Resolved | Dec 31, 2018 | Nitrate Rule |
| Oct 1, 2018 | Dec 31, 2018 | Nitrate-Nitrite | MCL | Yes | No | 11 MG/L | — | 10 | Resolved | Dec 31, 2018 | Nitrate Rule |
| Oct 1, 2018 | Dec 31, 2018 | Nitrate-Nitrite | MCL | Yes | No | 11 MG/L | — | 10 | Resolved | Dec 31, 2018 | Nitrate Rule |
| Jul 1, 2018 | Sep 30, 2018 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Sep 30, 2018 | Nitrate Rule |
| Jul 1, 2018 | Sep 30, 2018 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Sep 30, 2018 | Nitrate Rule |
| Jul 1, 2018 | Sep 30, 2018 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Sep 30, 2018 | Nitrate Rule |
| Jul 1, 2018 | Sep 30, 2018 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Sep 30, 2018 | Nitrate Rule |
| Jul 1, 2018 | Sep 30, 2018 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Sep 30, 2018 | Nitrate Rule |
| Apr 1, 2018 | Jun 30, 2018 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Jun 30, 2018 | Nitrate Rule |
| Apr 1, 2018 | Jun 30, 2018 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Jun 30, 2018 | Nitrate Rule |
| Apr 1, 2018 | Jun 30, 2018 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Jun 30, 2018 | Nitrate Rule |
| Apr 1, 2018 | Jun 30, 2018 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Jun 30, 2018 | Nitrate Rule |
| Apr 1, 2018 | Jun 30, 2018 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Jun 30, 2018 | Nitrate Rule |
| Jan 1, 2018 | Mar 31, 2018 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Mar 31, 2018 | Nitrate Rule |
| Jan 1, 2018 | Mar 31, 2018 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Mar 31, 2018 | Nitrate Rule |
| Jan 1, 2018 | Mar 31, 2018 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Mar 31, 2018 | Nitrate Rule |
| Jan 1, 2018 | Mar 31, 2018 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Mar 31, 2018 | Nitrate Rule |
| Jan 1, 2018 | Mar 31, 2018 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Mar 31, 2018 | Nitrate Rule |
| Oct 1, 2017 | Dec 31, 2017 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Dec 31, 2017 | Nitrate Rule |
| Oct 1, 2017 | Dec 31, 2017 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Dec 31, 2017 | Nitrate Rule |
| Oct 1, 2017 | Dec 31, 2017 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Dec 31, 2017 | Nitrate Rule |
| Oct 1, 2017 | Dec 31, 2017 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Dec 31, 2017 | Nitrate Rule |
| Oct 1, 2017 | Dec 31, 2017 | Nitrate-Nitrite | MCL | Yes | No | 13 MG/L | — | 10 | Resolved | Dec 31, 2017 | Nitrate Rule |
| Jul 1, 2017 | Sep 30, 2017 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Sep 30, 2017 | Nitrate Rule |
| Jul 1, 2017 | Sep 30, 2017 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Sep 30, 2017 | Nitrate Rule |
| Jul 1, 2017 | Sep 30, 2017 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Sep 30, 2017 | Nitrate Rule |
| Jul 1, 2017 | Sep 30, 2017 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Sep 30, 2017 | Nitrate Rule |
| Jul 1, 2017 | Sep 30, 2017 | Nitrate-Nitrite | MCL | Yes | No | 14 MG/L | — | 10 | Resolved | Sep 30, 2017 | Nitrate Rule |
| Apr 1, 2017 | Jun 30, 2017 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Jun 30, 2017 | Nitrate Rule |
| Apr 1, 2017 | Jun 30, 2017 | Nitrate-Nitrite | MCL | Yes | No | 12 MG/L | — | 10 | Resolved | Jun 30, 2017 | Nitrate Rule |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.