Ridgeview Estates MWC

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: 50 people
Connections: 18
Water source: Groundwater
Based in: Boulder Creek, CA
County: Santa Cruz
Owner: Private
Hardness: Very hard

The ZIP code it serves

95006

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. No health-based violations on file since 2016.

What was found

Fluoride, arsenic, chromium (total), haloacetic acids (HAA5), nitrate and total trihalomethanes (TTHM): California’s own results, samples taken from Aug. 30, 2021 to Dec. 29, 2025.

Below EPA’s limits1

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.25ppm

Highest yearly average, 2021

Averaged by year, the highest was 0.25 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. That is the only year on file.

What handles it

NSF/ANSI 58 look for “Fluoride Reduction”
NSF/ANSI 53 look for “Fluoride”

6 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

Arsenic
Chromium (total)
Haloacetic acids (HAA5)
Lead
Nitrate
Total trihalomethanes (TTHM)

Hardness

Very hard, 400 mg/L (23.4 grains per gallon), at its one sampling point, in 2021.

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 23.4 grains per gallon, salt included Softener or salt-free conditioner?California water hardness, utility by utility

Violations since 2016

No health-based violations on file with EPA since 2016. There are 2 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

Everything else. Fluoride, arsenic, chromium (total), haloacetic acids (HAA5), nitrate and total trihalomethanes (TTHM) results here are California’s own from 2021 on, with EPA’s national file for 2012 to 2019. Ridgeview Estates MWC’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 Aug. 30, 2021 to Dec. 29, 2025.

Testing your own tap

Ridgeview Estates MWC’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.

The 3 labs California certifies closest to the area Ridgeview Estates MWC serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

Santa Cruz County - Health Services Agency - Environmental Health
Santa Cruz, CA · about 14 miles
Certified for bacteria
(831) 454-4624
Torrent Laboratory, Inc
Milpitas, CA · about 22 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS
(408) 263-5258
AEMTEK, Inc
Fremont, CA · about 25 miles
Certified for bacteria, minerals and other inorganics
(510) 979-1979