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Desert Sky Dwid

What EPA’s and CDC’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves
72 people
Connections
33
Water source
Groundwater
Based in
Salome, AZ
County
La Paz
Owner
Private
The ZIP code it serves

85348

The short answer

3 results are above EPA’s legal limit, and 1 more is above the health goal. The worst: Fluoride, above the legal limit. 7 health-based violations since 2016.

What handles it

What was found

Arsenic, nitrate and total trihalomethanes (TTHM): Arizona’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2020 to 2023, with EPA’s 2012 to 2019 file for earlier years.

Fluoride: EPA’s violation records from 2020 on, with EPA’s 2012 to 2019 file for earlier years.

Uranium and chromium (total): EPA’s compliance monitoring file, samples taken from July 18, 2018 to Dec. 18, 2018. Newer results are in the utility’s annual water quality report.

Above the legal limit3

Fluoride

Forms or is added in treatment

Above the legal limit

6.5ppm

Limit violation, 2025

EPA recorded a violation of the legal limit for fluoride at this utility in 2025. The highest measured level, for Jan. 1, 2025 to Dec. 31, 2025, was 6.5 ppm, above EPA’s legal limit of 4.0 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.57 ppm, in 2019, and EPA recorded a violation in 2019.

What handles it

Arsenic

Comes from the source

Above the legal limit

8.0ppb

Highest yearly average, 2020 to 2023

2023: not found

Averaged by year, the highest was 8.0 ppb, in 2020: below EPA’s legal limit of 10 ppb, but above its health goal of zero. In 2023, the latest year on file, it wasn’t found. EPA judges this limit at each sampling point, and recorded a violation for arsenic at this utility in 2025. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 26.3 ppb, in 2014.

What handles it

  • NSF/ANSI 58 look for “Arsenic (Pentavalent)<=50 ppb Reduction”
  • NSF/ANSI 53 look for “Arsenic (Pentavalent)<=50 ppb Reduction”

Nitrate

Comes from the source

Above the legal limit

2.2ppm

Highest yearly average, 2020 to 2023

2023 average: 0.64 ppm

Averaged by year, the highest was 2.2 ppm, in 2021, below EPA’s legal limit of 10 ppm. In 2023, the latest year on file, it averaged 0.64 ppm. EPA judges this limit at each sampling point, and recorded a violation for nitrate at this utility in 2021. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 4.6 ppm, in 2019.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Above the health goal1

Uranium

Comes from the source

Above the health goal

3.7ppb

Highest yearly average, 2018

Averaged by year, the highest was 3.7 ppb, in 2018: below EPA’s legal limit of 30 ppb, but above its health goal of zero. That is the only year on file.

What handles it

Below EPA’s limits1

Chromium (total)

Comes from the source

Below EPA’s limits

38.5ppb

Highest yearly average, 2018

Averaged by year, the highest was 38.5 ppb, in 2018, below EPA’s legal limit of 100 ppb. Its highest single sample was 41 ppb. That is the only year on file.

What handles it

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Lead
  • Total trihalomethanes (TTHM)

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

  • NSF/ANSI 53

    Claims: Fluoride, Arsenic (Pentavalent)<=50 ppb Reduction, Nitrate/Nitrite (30 ppm challenge)

    For: Fluoride, Arsenic, Nitrate

    Other certifiers’ wording: Arsenic (III) (50 ppb influent level)

  • NSF/ANSI 58

    Claims: Fluoride Reduction, Arsenic (Pentavalent)<=50 ppb Reduction, Nitrate/Nitrite Reduction, Uranium

    For: Fluoride, Arsenic, Nitrate, Uranium

    Other certifiers’ wording: Arsenic (Pentavalent)<=300 ppb Reduction; Arsenic (V) (300 ppb influent level); Nitrate

At the tap, or for the whole house?

These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

The best water filters for fluoride, ranked

The best reverse osmosis systems, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Groundwater RuleA significant problem found in a state inspection was not fixed on time.EPA: Failure To Address DeficiencyMarch 16, 2025—Resolved
FluorideA sample was above the legal limit, for a contaminant judged one sample at a time.EPA: Maximum Contaminant Level Violation, Single SampleJan. 1, 2025 to Dec. 31, 20256.5 MG/LResolved
ArsenicA sample was above the legal limit, for a contaminant judged one sample at a time.EPA: Maximum Contaminant Level Violation, Single SampleJan. 1, 2025 to Dec. 31, 20250.047 MG/LResolved
Revised Total Coliform RuleColiform results required a check of the system, and the check or its fixes were not done on time.EPA: Treatment Technique, Level 1 Assessment (RTCR)Nov. 28, 2021—Resolved
NitrateThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2021 to Dec. 31, 202132 MG/LResolved
Revised Total Coliform RuleColiform results required a check of the system, and the check or its fixes were not done on time.EPA: Treatment Technique, Level 1 Assessment (RTCR)Oct. 28, 2019—Resolved
FluorideThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2019 to Dec. 31, 20216.1 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 126 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Arsenic, nitrate and total trihalomethanes (TTHM) results here are Arizona’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Uranium and chromium (total) come from EPA’s file alone, which ends in 2019. Desert Sky Dwid’s own annual report, which it must send you every year, has newer results for those and the contaminants this page does not show.

  • Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.

  • What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.

  • Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; CDC’s yearly averages for Arizona cover 2020 to 2023; EPA’s compliance samples are from July 18, 2018 to Dec. 18, 2018.

Testing your own tap

Desert Sky Dwid’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Arizona certifies.

The 2 labs Arizona certifies closest to the area Desert Sky Dwid serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Fresh Terra Services, LLC.

    Yuma, AZ · about 68 miles

    (928) 257-3601

  • Eurofins Microbiology Laboratories

    Yuma, AZ · about 68 miles

    (928) 317-1127

All 49 certified labs for Arizona

Sources

PWSID AZ0415122. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in La Paz County

All Arizona utilities

What to do next