Nitrate above the legal limit in the period starting January 2026; 2 open health-based violations on EPA record.
Serves about 292 people (160 connections) with groundwater from its own wells, and buys water from Clarkdale Municipal Water System.
From EPA's record for AZ0413221. PurityMap is independent of White Horse Ranch Owners Association.
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35 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2026 | Nitrate | 23 mg/L | 10 mg/L | Archived |
| From November 2025 | Groundwater Rule | – | – | Unaddressed |
| From November 2025 | Groundwater Rule | – | – | Unaddressed |
| From October 2025 | Nitrate | 23 mg/L | 10 mg/L | Archived |
| From July 2025 | Nitrate | 24 mg/L | 10 mg/L | Archived |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From April 2025 | Nitrate | 22 mg/L | 10 mg/L | Archived |
| From January 2025 | Nitrate | 19 mg/L | 10 mg/L | Archived |
| From October 2024 | Nitrate | 12 mg/L | 10 mg/L | Archived |
| From July 2024 | Nitrate | 17 mg/L | 10 mg/L | Archived |
| From April 2024 | Nitrate | 15 mg/L | 10 mg/L | Archived |
| From January 2024 | Nitrate | 14 mg/L | 10 mg/L | Archived |
| From October 2023 | Nitrate | 12 mg/L | 10 mg/L | Archived |
| From July 2023 | Nitrate | 18 mg/L | 10 mg/L | Archived |
| From April 2023 | Nitrate | 14 mg/L | 10 mg/L | Archived |
| From January 2023 | Nitrate | 15 mg/L | 10 mg/L | Archived |
| From October 2022 | Nitrate | 14 mg/L | 10 mg/L | Archived |
| From July 2022 | Nitrate | 13 mg/L | 10 mg/L | Archived |
| From April 2022 | Nitrate | 13 mg/L | 10 mg/L | Archived |
| From January 2022 | Nitrate | 12 mg/L | 10 mg/L | Archived |
| From October 2021 | Nitrate | 10.6 mg/L | 10 mg/L | Archived |
| From April 2021 | Nitrate | 14 mg/L | 10 mg/L | Archived |
| From April 2021 | Nitrate | 14 mg/L | 10 mg/L | Archived |
| From October 2020 | Nitrate | 11 mg/L | 10 mg/L | Archived |
| From July 2020 | Nitrate | 14 mg/L | 10 mg/L | Resolved |
| From April 2020 | Nitrate | 12 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 →White Horse Ranch Owners Association's phone number on EPA record is 928-445-0551. Its mailing address is PO BOX 10000, PRESCOTT, AZ 86304.
According to EPA's record, White Horse Ranch Owners Association uses groundwater from its own wells, and buys water from Clarkdale Municipal Water System.
EPA's record shows 35 health-based violations for White Horse Ranch Owners Association in the 10 years to July 9, 2026. Nitrate was above the legal limit in the period starting January 2026. EPA's record also shows 2 open health-based violations. EPA also lists 7 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in White Horse Ranch Owners Association's latest lead and copper round, which ended in December 2024. The federal action level is 15 µg/L.
PurityMap has no verified website for White Horse Ranch Owners Association. Its phone number on EPA record is 928-445-0551. Its mailing address on EPA record is PO BOX 10000, PRESCOTT, AZ 86304. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.