1 open health-based violation on EPA record.
Serves about 48 people (18 connections) with groundwater from its own wells, and buys water from Arizona Water Co.
From EPA's record for AZ0411201. PurityMap is independent of Northern Section 4 Coop.
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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 |
|---|---|---|---|---|
| From February 2019 | Groundwater Rule | – | – | Unaddressed |
| From January 2017 | Nitrate | 11.6 mg/L | 10 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 →Northern Section 4 Coop's phone number on EPA record is 480-622-9716. Its mailing address is 4925 N. Cactus Rd., APACHE JUNCTION, AZ 85119.
According to EPA's record, Northern Section 4 Coop uses groundwater from its own wells, and buys water from Arizona Water Co.
EPA's record shows 2 health-based violations for Northern Section 4 Coop in the 10 years to July 9, 2026. EPA's record lists 1 open health-based violation. EPA also lists 15 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Northern Section 4 Coop's latest lead and copper round, which ended in December 2022, was 0.62 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Northern Section 4 Coop. Its phone number on EPA record is 480-622-9716. Its mailing address on EPA record is 4925 N. Cactus Rd., APACHE JUNCTION, AZ 85119. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.