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Los Banos Tap Water Quality Report
Los Banos's water record shows 1 contaminant above a state limit. Consider using a certified water filter for additional protection.
Other systems listed for Los Banos with results above guidelines: FIVE POINTS RANCH (1 above guidelines)
People Served
47,419
Health-based violations since 2020
0
CITY OF LOS BANOS. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Mar 2025 · CITY OF LOS BANOS
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Los Banos Tap Water Safe to Drink?
We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. Los Banos's water record shows 1 contaminant above a state limit.
CITY OF LOS BANOS, Los Banos's water system, serves 47,419 people. 1 other system is listed for Los Banos. Each system's results are listed under its own name, never added to CITY OF LOS BANOS's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for CITY OF LOS BANOS is from Mar 2025.
State Water Board lab results show every active source CITY OF LOS BANOS sampled above California's hexavalent chromium limit of 10 µg/L (state MCL, in effect since October 1, 2024). Its highest average is 52 µg/L at WELL 07-STBY (6 samples since October 1, 2024, latest June 24, 2026). Its compliance date, for a system of its size, is October 1, 2026. Source: State Water Resources Control Board lab results (updated 2026-09-15).
In EPA's 2023–2026 UCMR 5 testing, CITY OF LOS BANOS measured lithium at up to 43.6 µg/L, which EPA counts as above its health reference level of 10 µg/L. That level is a screening value EPA uses to decide what to study further, not a legal limit, and this result does not change this page's water-quality summary.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in California
Los Banos Water Service Areas
What these numbers actually mean for Los Banos, CA
We read Los Banos, CA’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 1 contaminant above a state limit
- 23 results on file
- 23 PFAS compounds on record
Buying a home here? Property Water Report — $49 Emailed within one business day.
Fluoride in Los Banos's water
CITY OF LOS BANOS
PWSID CA2410005
No fluoride level in our data for CITY OF LOS BANOS. Your utility's annual water quality report (CCR) lists it.
FIVE POINTS RANCH
PWSID CA1009020
No fluoride level in our data for FIVE POINTS RANCH. Your utility's annual water quality report (CCR) lists it.
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General-Purpose Water Filters for Los Banos
Los Banos's results show no result above EPA's health goals or legal limits, so these are general-purpose NSF/ANSI 53 certified filters, not chosen for any contaminant.
Pentair Residential Filtration, LLC
Everpure Residential H-300-NXT
NSF Certified:
Capacity
3001 gal
Filter Life
10 mo
Flow Rate
0.5 gpm
Removes 5 contaminants:
Whirlpool Corporation
W11256135
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.7 gpm
Removes 19 contaminants:
+14 more
Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Tetrachloroethylene, Toxaphene, Turbidity
Whirlpool Corporation
W11569861
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.52 gpm
Removes 22 contaminants:
+17 more
Atrazine, Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Styrene, Tetrachloroethylene, Toxaphene, Trichloroethylene, Turbidity
Santevia
Bath Filter
NSF Certified:
Flow Rate
0.36 gpm
Highlights:
- Organic cotton design reduces plastic used in construction
- Affordable upfront & ongoing cost
- The only bath filter that removed 100% chlorine with “normal” faster faucet flow
Removes 1 contaminants:
Test Your Water Quality
Professional laboratory testing provides accurate, detailed analysis of your drinking water.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What Los Banos's water readings can explain
We publish a city-level hardness figure for Los Banos, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Los Banos? Public-water results do not apply to private wells. See Merced County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Los Banos
Los Banos's tap water has an estimated 8.0 grains per gallon (137.5 mg/L, county sampling in Merced County) — hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for an estimated 8.0 gpg water in Los Banos — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For California as a whole, read water softener cost in California — priced against the plumber wage published for the state.
Frequently Asked Questions About Los Banos Tap Water
Los Banos's water record shows 1 contaminant above a state limit. We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. State Water Board lab results show every active source CITY OF LOS BANOS sampled above California's hexavalent chromium limit of 10 µg/L (state MCL, in effect since October 1, 2024). Its highest average is 52 µg/L at WELL 07-STBY (6 samples since October 1, 2024, latest June 24, 2026). Its compliance date, for a system of its size, is October 1, 2026. Source: State Water Resources Control Board lab results (updated 2026-09-15).
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach CITY OF LOS BANOS. For a problem with your water now (discolored water, no water, low pressure, a leak), contact CITY OF LOS BANOS directly.
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