Exceeds EPA Limit Arsenic EXCEEDS EPA LIMIT

Arsenic in Alamosa, CO Drinking Water

Arsenic data for Alamosa, Colorado · 15,454 residents · 1 ZIP code

ZipCheckup's reading of Arsenic in Alamosa, Colorado: Arsenic carries a high health-risk designation.

Federal water monitoring extends to thousands of public water systems, and in Alamosa, Colorado, that tracking has turned up Arsenic - the detection is logged in the EPA compliance record and reflects samples collected under routine Safe Drinking Water Act reporting requirements.

10 ppb
EPA MCL
13
EPA Violations
High
Health Risk
Reverse Osmosis
Best Filter Method

Data: EPA SDWIS, CCR Reports, ECHO

Arsenic in Alamosa Tap Water

Alamosa, Colorado has 13 EPA violations related to arsenic in drinking water.

This analysis covers 15,454 residents across 1 ZIP code in Alamosa.

Is Arsenic in Alamosa Water Safe?

Arsenic levels in parts of Alamosa 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 Alamosa

Date Violation Type Status ZIP Code
2024-04-01 Arsenic (Resolved) Resolved 81101
2024-01-01 Arsenic (Resolved) Resolved 81101
2023-10-01 Arsenic (Resolved) Resolved 81101
2023-07-01 Arsenic (Resolved) Resolved 81101
2023-04-01 Arsenic (Resolved) Resolved 81101
2023-01-01 Arsenic (Resolved) Resolved 81101
2022-10-01 Arsenic (Resolved) Resolved 81101
2022-07-01 Arsenic (Resolved) Resolved 81101
2022-04-01 Arsenic (Resolved) Resolved 81101
2022-01-01 Arsenic (Resolved) Resolved 81101
2021-10-01 Arsenic (Resolved) Resolved 81101
2021-07-01 Arsenic (Resolved) Resolved 81101
2021-04-01 Arsenic (Resolved) Resolved 81101

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 Alamosa 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.

Related

HomeContaminantsArsenicColorado → Alamosa

How to cite this page

APA ZipCheckup. (2026). Arsenic in Alamosa, CO Drinking Water. https://zipcheckup.com/contaminants/arsenic/alamosa-co/
BibTeX
@misc{zipcheckup-contaminants-arsenic-alamosa-co,
  author = {{ZipCheckup}},
  title  = {{Arsenic in Alamosa, CO Drinking Water}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/arsenic/alamosa-co/}
}

Page version: September 2026.

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