No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting July 2018.
Serves about 237 people (120 connections) with surface water bought from Omnd Water Treatment Plant.
From EPA's record for ND2901054. PurityMap is independent of City of Zap.
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2 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jul–Sep 2018 | Chloramine | 4.1 mg/L | 4.0 mg/L | Resolved |
| Jan–Mar 2018 | Chloramine | 4.2 mg/L | 4.0 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 →According to EPA's record, City of Zap uses surface water bought from Omnd Water Treatment Plant.
EPA's record shows 2 health-based violations for City of Zap 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 2018. 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 City of Zap's latest lead and copper round, which ended in December 2025, was 2.96 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for City of Zap. Its mailing address on EPA record is 121 MAIN ST, PO BOX 97, ZAP, ND 58580. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.