Exceeds EPA Limit Arsenic EXCEEDS EPA LIMIT

Arsenic in Fergus Falls, MN Drinking Water

Arsenic data for Fergus Falls, Minnesota · 14,362 residents · 2 ZIP codes

Not every city shows Arsenic in its water data; in Fergus Falls, Minnesota, federal sampling has confirmed its presence at detectable levels in at least one recent reporting cycle.

10 ppb
EPA MCL
20
EPA Violations
High
Health Risk
Reverse Osmosis
Best Filter Method

Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14

Arsenic in Fergus Falls Tap Water

Fergus Falls, Minnesota has 20 EPA violations related to arsenic in drinking water.

This analysis covers 14,362 residents across 2 ZIP codes in Fergus Falls.

Fergus Falls's overall water quality grade is F (38/100).

Is Arsenic in Fergus Falls Water Safe?

Arsenic levels in parts of Fergus Falls exceed the EPA MCL of 10 ppb. The EPA requires water systems to take corrective action when this limit is exceeded.

If you live in an affected ZIP code, consider installing a reverse osmosis filter certified under NSF 53 / NSF 58 and testing your water independently.

EPA Violations for Arsenic in Fergus Falls

Date Violation Type Status ZIP Code
2025-04-01 Arsenic (Known) Known 56537
2025-04-01 Arsenic (Known) Known 56538
2025-01-01 Arsenic (Known) Known 56537
2025-01-01 Arsenic (Known) Known 56538
2024-10-01 Arsenic (Known) Known 56537
2024-10-01 Arsenic (Known) Known 56538
2024-07-01 Arsenic (Known) Known 56537
2024-07-01 Arsenic (Known) Known 56538
2024-04-01 Arsenic (Known) Known 56537
2024-04-01 Arsenic (Known) Known 56538
2024-01-01 Arsenic (Known) Known 56537
2024-01-01 Arsenic (Known) Known 56538
2023-10-01 Arsenic (Known) Known 56537
2023-10-01 Arsenic (Known) Known 56538
2023-07-01 Arsenic (Known) Known 56537
2023-07-01 Arsenic (Known) Known 56538
2023-04-01 Arsenic (Known) Known 56537
2023-04-01 Arsenic (Known) Known 56538
2023-01-01 Arsenic (Known) Known 56537
2023-01-01 Arsenic (Known) Known 56538

Health Effects of Arsenic

  • Increased risk of skin, bladder, lung, and kidney cancer
  • Cardiovascular disease and type 2 diabetes
  • Skin changes (darkening, thickening, lesions)
  • Developmental effects in children exposed in utero

Health risk severity: High. Governed by the Arsenic Rule (2006).

How Arsenic Gets Into Drinking Water

  • Natural deposits in rock and soil (especially in western U.S.)
  • Runoff from orchards and glass/electronics production
  • Historical use of arsenic-based pesticides
  • Well water in areas with arsenic-rich geology

What to Do About Arsenic in Fergus Falls Water

  1. Install a reverse osmosis (RO) system certified under NSF 58
  2. Adsorptive media filters (iron-based) can also reduce arsenic
  3. Have well water tested if on a private supply
  4. Boiling water does NOT remove arsenic — it concentrates it

Look for filters certified under NSF 53 / NSF 58 for arsenic removal.

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