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Dogwood Blue Jay Cyn Imp

What EPA’s and California’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
232 people
Connections
83
Water source
Groundwater
Based in
Blue Jay, CA
County
San Bernardino
Owner
Private
Hardness
Varies by source
The ZIP code it serves

92317

The short answer

1 result is above EPA’s legal limit, and 1 more is above the health goal. The worst: Copper, above the action level. No health-based violations on file since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2023.

Uranium, fluoride, nitrate, haloacetic acids (HAA5), total trihalomethanes (TTHM), arsenic and chromium (total): California’s own results, samples taken from Jan. 6, 2020 to July 2, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Copper

Comes from pipes, often your own

Above the action level

1.5ppm

90th percentile, 2021 to 2023

In the latest period, 9 in 10 homes sampled were at or below 1.5 ppm, above EPA’s action level of 1.3 ppm.

What handles it

Above the health goal1

Uranium

Comes from the source

Above the health goal

19.8ppb

Highest yearly average, 2020 to 2026

2026 average: 16.9 ppb

Averaged by year, the highest was 19.8 ppb, in 2020: below EPA’s legal limit of 30 ppb, but above its health goal of zero. Its highest single sample was 76 ppb. In 2026, the latest year on file, its 14 samples averaged 16.9 ppb. EPA recorded no violation for uranium at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 24.5 ppb, in 2017.

What handles it

Below EPA’s limits4

Fluoride

Forms or is added in treatment

Below EPA’s limits

1.9ppm

Highest yearly average, 2022 to 2026

Averaged by year, the highest was 1.9 ppm, in 2026, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.22 ppm, in 2012.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.49ppm

Highest sample; found in 6 of 13

2026: not found

The highest sample, in 2023, was 0.49 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.47 ppm, in 2019.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

2.7ppb

Highest yearly average, 2020 to 2023

2023: not found

Averaged by year, the highest was 2.7 ppb, in 2020, below EPA’s legal limit of 60 ppb. Its highest single sample was 8.0 ppb. In 2023, the latest year on file, it wasn’t found in any of its three samples.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

2.2ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 2.2 ppb, in 2020, below EPA’s legal limit of 80 ppb. Its highest single sample was 11 ppb. In 2026, the latest year on file, it wasn’t found in its one sample.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Lead

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.”

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. 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

Hardness

Soft to moderately hard depending on the source, 29 to 100 mg/L (1.7 to 5.8 grains per gallon), across 3 sampling points, 2019 to 2026.

Hardness is calcium and magnesium. EPA sets no limit for it: it shows up as scale on fixtures and in water heaters, and as soap that won’t lather. USGS calls water above 60 mg/L moderately hard, above 120 hard and above 180 very hard.

Softeners compared, salt includedSoftener or salt-free conditioner?California water hardness, utility by utility

Violations since 2016

No health-based violations on file with EPA since 2016.

What this report can’t tell you

  • Everything else. Uranium, fluoride, nitrate, haloacetic acids (HAA5), total trihalomethanes (TTHM), arsenic and chromium (total) results here are California’s own from 2020 on, with EPA’s national file for 2012 to 2019. Dogwood Blue Jay Cyn Imp’s own annual report, which it must send you every year, has 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; California’s results run from Jan. 6, 2020 to July 2, 2026.

Testing your own tap

Dogwood Blue Jay Cyn Imp’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 California certifies.

No lab California certifies is within 75 miles of the area Dogwood Blue Jay Cyn Imp serves on the state’s list. Some take samples by mail; the state’s page lists them all.

All 145 certified labs for California

Sources

PWSID CA3600094. Rebuilt from EPA data on Oct. 18, 2026.

Also in San Bernardino County

All California utilities

What to do next