No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting January 2019.
Serves about 1,233 people (501 connections) with surface water bought from City of Great Falls.
From EPA's record for MT0000157. PurityMap is independent of Black Eagle Cascade County Water Sewer.
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4 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jan–Mar 2019 | Haloacetic acids (HAA5) | 65.8 µg/L | 0.060 mg/L | Resolved |
| Oct–Dec 2018 | Haloacetic acids (HAA5) | 67.8 µg/L | 0.060 mg/L | Resolved |
| Jul–Sep 2018 | Haloacetic acids (HAA5) | 69 µg/L | 0.060 mg/L | Resolved |
| Apr–Jun 2018 | Haloacetic acids (HAA5) | 63 µg/L | 0.060 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 →Black Eagle Cascade County Water Sewer's phone number on EPA record is 406-761-4408. Its mailing address is PO BOX 1, BLACK EAGLE, MT 59414.
According to EPA's record, Black Eagle Cascade County Water Sewer uses surface water bought from City of Great Falls.
EPA's record shows 4 health-based violations for Black Eagle Cascade County Water Sewer 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 January 2019. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Black Eagle Cascade County Water Sewer's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Black Eagle Cascade County Water Sewer. Its phone number on EPA record is 406-761-4408. Its mailing address on EPA record is PO BOX 1, BLACK EAGLE, MT 59414. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.