Chromium-6 in Prescott, AZ Drinking Water
Chromium-6 data for Prescott, Arizona · 65,412 residents · 6 ZIP codes
ZipCheckup's reading of Chromium-6 in Prescott, Arizona: the highest detected level is 0.14 ppb; the EPA limit is 100 ppb (total chromium MCL). Chromium-6 carries a high health-risk designation.
Within Prescott, Arizona, Chromium-6 has been detected in water samples drawn from the public supply - the results are part of the official EPA compliance record for systems here.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13
Chromium-6 in Prescott Tap Water
Chromium-6 has been detected in Prescott, Arizona drinking water at a maximum level of 0.14 ppm — 1.4x the EPA MCL.
This analysis covers 65,412 residents across 6 ZIP codes in Prescott.
Prescott's overall water quality grade is F (32/100).
Is Chromium-6 in Prescott Water Safe?
Chromium-6 was detected in Prescott water but currently falls within EPA limits. However, some health organizations argue the EPA MCL may not be protective enough.
If you are concerned, a reverse osmosis or strong-base anion exchange filter can reduce chromium-6 levels further.
Chromium-6 Levels by ZIP Code
| ZIP Code | Chromium-6 Level | EPA Limit | Status |
|---|---|---|---|
| 86301 | 0.14 ppm | 100 ppb (total chromium MCL) | Exceeds limit |
| 86302 | 0.14 ppm | 100 ppb (total chromium MCL) | Exceeds limit |
| 86303 | 0.14 ppm | 100 ppb (total chromium MCL) | Exceeds limit |
| 86304 | 0.14 ppm | 100 ppb (total chromium MCL) | Exceeds limit |
| 86305 | 0.14 ppm | 100 ppb (total chromium MCL) | Exceeds limit |
| 86313 | 0.14 ppm | 100 ppb (total chromium MCL) | Exceeds limit |
Average chromium-6 level across Prescott: 0.14 ppb
Health Effects of Chromium-6
- Stomach and intestinal cancer (likely carcinogen via ingestion)
- Known carcinogen when inhaled
- Liver and kidney damage
- Reproductive and developmental harm
Health risk severity: High. Governed by the National Primary Drinking Water Regulations.
How Chromium-6 Gets Into Drinking Water
- Industrial discharge from steel and pulp mills
- Natural erosion of chromium deposits
- Coal ash disposal sites
- Cooling tower discharge
What to Do About Chromium-6 in Prescott Water
- Reverse osmosis systems are most effective
- Strong-base anion exchange can reduce chromium-6
- Standard carbon filters are NOT effective for chromium-6
- Look for NSF 58 certification
Look for filters certified under NSF 58 for chromium-6 removal.