No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting July 2024.
Serves about 2,264 people (957 connections) with groundwater from its own wells.
From EPA's record for OK2002901. PurityMap is independent of Hollis.
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11 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From July 2024 | Nitrate + Nitrite | 13 mg/L | – | Resolved |
| From July 2020 | Nitrate + Nitrite | 13 mg/L | – | Resolved |
| From October 2018 | Nitrate + Nitrite | 11 mg/L | – | Resolved |
| From July 2018 | Nitrate + Nitrite | 14 mg/L | – | Resolved |
| From April 2018 | Nitrate + Nitrite | 14 mg/L | – | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2018 | Nitrate + Nitrite | 12 mg/L | – | Resolved |
| From October 2017 | Nitrate + Nitrite | 13 mg/L | – | Resolved |
| From July 2017 | Nitrate + Nitrite | 14 mg/L | – | Resolved |
| From April 2017 | Nitrate + Nitrite | 12 mg/L | – | Resolved |
| From January 2017 | Nitrate + Nitrite | 12 mg/L | – | Resolved |
| From October 2016 | Nitrate + Nitrite | 12 mg/L | – | Resolved |
No lab results for other contaminants (like PFAS) are on file for this system. EPA required that testing from systems serving more than 3,300 people, plus a sample of smaller ones.
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
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Follow this water →Hollis's phone number on EPA record is 580-688-9245. Its mailing address is Kendall Williams, Mayor, P.O. BOX 188, HOLLIS, OK 73550.
According to EPA's record, Hollis uses groundwater from its own wells.
EPA's record shows 11 health-based violations for Hollis in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The latest legal-limit breach on record was in the period starting July 2024. EPA also lists 3 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Hollis's latest lead and copper round, which ended in December 2024, was 2.6 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Hollis. Its phone number on EPA record is 580-688-9245. Its mailing address on EPA record is Kendall Williams, Mayor, P.O. BOX 188, HOLLIS, OK 73550. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.