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Ymca Camp Marston/Raintree

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
28 people
Connections
23
Water source
Groundwater
Based in
Julian, CA
County
San Diego
Owner
Private
Hardness
Moderately hard

The short answer

Nothing in EPA’s and California’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. 1 health-based violation since 2016.

What was found

Total trihalomethanes (TTHM), nitrate, haloacetic acids (HAA5), fluoride, chromium (total), arsenic and uranium: California’s own results, samples taken from Jan. 8, 2020 to June 15, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits5

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

62.4ppb

Highest yearly average, 2020 to 2025

Averaged by year, the highest was 62.4 ppb, in 2025, below EPA’s legal limit of 80 ppb. That was also the latest year on file.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Nitrate

Comes from the source

Below EPA’s limits

5.5ppm

Highest sample; found in 77 of 92

2026 average: 1.4 ppm

The highest sample, in 2022, was 5.5 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its nine samples averaged 1.4 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 14.9 ppm, in 2016.

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

18.9ppb

Highest yearly average, 2020 to 2025

Averaged by year, the highest was 18.9 ppb, in 2025, below EPA’s legal limit of 60 ppb. That was also the latest year on file.

What handles it

No certification claim covers this compound yet.

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.047ppm

Highest yearly average, 2020 to 2024

Averaged by year, the highest was 0.047 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.14 ppm. That was also the latest year on file.

What handles it

Chromium (total)

Comes from the source

Below EPA’s limits

0.25ppb

Highest yearly average, 2020 to 2024

2024: not found

Averaged by year, the highest was 0.25 ppb, in 2020, below EPA’s legal limit of 100 ppb. Its highest single sample was 0.3 ppb. In 2024, the latest year on file, it wasn’t found in any of its three samples.

What handles it

3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Lead
  • Uranium

Hardness

Moderately hard, 103 mg/L (6 grains per gallon), at its one sampling point, in 2024.

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 at 6 grains per gallon, salt includedSoftener or salt-free conditioner?California water hardness, utility by utility

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Revised Total Coliform RuleE. coli was confirmed in the water system.EPA: Maximum Contaminant Level Violation, E. coli (RTCR)Nov. 1, 2023 to Nov. 30, 2023—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 7 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), nitrate, haloacetic acids (HAA5), fluoride, chromium (total), arsenic and uranium results here are California’s own from 2020 on, with EPA’s national file for 2012 to 2019. Ymca Camp Marston/Raintree’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. 8, 2020 to June 15, 2026.

Testing your own tap

Ymca Camp Marston/Raintree’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 Ymca Camp Marston/Raintree 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 CA3700912. Rebuilt from EPA data on Oct. 18, 2026.

Also in San Diego County

All California utilities

What to do next