Is Morgan Hill, CA tap water safe?
The short answer
3 of the 10 utilities serving Morgan Hill have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Green Acres Mutual Water, Foothill Mutual Water Company and Sullivan Mutual Water.
City of Morgan Hill, which serves the most people here, has 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 25.5 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
The water from City of Morgan Hill is very hard, typically 247 mg/L (14.4 grains per gallon). How California’s water compares.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Morgan Hill’s ZIP codes, from EPA’s estimates.
- Open report
City of Morgan Hill
California · serves 47,374 people · about 2,700 in Morgan Hill
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 25.5 ppb, above EPA’s health benchmark. Hardness: very hard, typically 247 mg/L (14.4 grains per gallon).
No health-based violations since 2016
- Open report
Green Mountain Water Company
California · serves 80 people · under 100 in Morgan Hill
1 result above the health goal. The worst: Lead at 6.0 ppb, above the health goal. Hardness: very hard, 235 mg/L (13.7 grains per gallon).
No health-based violations since 2016
- Open report
Green Acres Mutual Water
California · serves 53 people · under 100 in Morgan Hill
Nothing in its records is above a health goal. Hardness: moderately hard to hard depending on the source, 100 to 165 mg/L (5.8 to 9.6 grains per gallon).
1 health-based violation since 2016
- Open report
Foothill Mutual Water Company
California · serves 32 people · under 100 in Morgan Hill
1 result above the legal limit. The worst: Nitrate at 11 ppm, above the legal limit. Hardness: very hard, 355 mg/L (20.8 grains per gallon).
2 health-based violations since 2016
- Open report
Rockwood Estates Mutual Water Company
California · serves 28 people · under 100 in Morgan Hill
Nothing in its records is above a health goal. Hardness: very hard, typically 338 mg/L (19.7 grains per gallon).
No health-based violations since 2016
- Open report
Uvas Pines Rv Park
California · serves 65 people · under 100 in Morgan Hill
Nothing in its records is above a health goal. Hardness: very hard, 190 mg/L (11.1 grains per gallon).
No health-based violations since 2016
- Open report
Sullivan Mutual Water
California · serves 53 people · under 100 in Morgan Hill
2 results above the health goal. The worst: Arsenic at 0.7 ppb, above the health goal. Hardness: very hard, 276 mg/L (16.1 grains per gallon).
1 health-based violation since 2016
- Open report
Thousand Trails - Morgan Hill
California · serves 13 people · under 100 in Morgan Hill
Nothing in its records is above a health goal. Hardness: very hard, 184 mg/L (10.8 grains per gallon).
No health-based violations since 2016
- Open report
Stonebridge Mutual Water Co
California · serves 38 people · based in Morgan Hill
1 result above the health goal. The worst: Lead at 0.6 ppb, above the health goal. Hardness: very hard, 290 mg/L (17 grains per gallon).
No health-based violations since 2016
- Open report
Deer Hill Mutual Water Co
California · serves 36 people · based in Morgan Hill
1 result above the health goal. The worst: Lead at 3.6 ppb, above the health goal.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in City of Morgan Hill’s water, which serves the most people here. Another utility’s report names what handles its own results.
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
Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic
Water testing near Morgan Hill
The 3 labs California certifies closest to Morgan Hill, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Bracewell Engineering, Inc.
Morgan Hill, CA · about 4 miles
Certified for bacteria, nitrate, minerals and other inorganics
CM Analytical, Inc.
Gilroy, CA · about 12 miles
Certified for bacteria
Torrent Laboratory, Inc
Milpitas, CA · about 23 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS
ZIP codes in Morgan Hill
Which ZIP codes are in Morgan Hill: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: California State Water Resources Control Board, ELAP accredited laboratories and their fields of accreditation; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Morgan Hill
Other towns in Santa Clara County with a page of their own.
What to do next
- Read City of Morgan Hill’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water