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County · California

San Bernardino County, California: drinking water records

Explore EPA records for 148 community water systems across 91 ZIP codes in San Bernardino County, then find water-testing resources and available recent monitoring-station readings.

In focus148Community water systems
Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 49 of the 148 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

49
systems in EPA's PFAS survey
24
systems where PFAS was found
12
systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses
51
systems that have reached the lead action level
35
systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 148 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water systemPeople servedPFAS survey resultsPFAS foundHealth-based violationsLead, 9 in 10 homes at or below
East Valley Water District CA3610064108,629840730 ppb
Yucaipa Valley Water District CA361005552,010933450 ppb
California Institution for Men CA361085010,66760052.5 ppb
Csa 70 W-3 Hacienda CA36001146111200380 ppb
Bar-Len Mwc CA3600025126600390 ppb
San Gabriel Valley Wc - Fontana CA3610041237,700770000 ppb
San Bernardino City CA3610039214,6651,320400 ppb
Cucamonga Valley Water District CA3610018211,069600000 ppb
Ontario Municipal Utilities Company CA3610034185,0101,080600.6 ppb
Victorville Water District CA3610052135,983864000 ppb
West Valley Water District CA3610004104,498600000 ppb
Hesperia WD CA3610024100,744900700 ppb
Chino, City of CA361001286,435720001 ppb
Upland, City of CA361005078,376990300 ppb
Redlands City Mud-Water Div CA361003778,0251,140302.9 ppb
Chino Hills, City of CA361003676,414180000 ppb
Liberty Utilities (Av Ranchos) Corp. CA361000364,469600000.6 ppb
Monte Vista WD CA361002956,017747500 ppb
Rialto, City of CA361003854,453570700 ppb
Colton, City of CA361001446,525446600 ppb
Adelanto, City of CA361000139,930118200 ppb
Golden State Water Co - Barstow CA361004332,547240401.6 ppb
Hi Desert WD CA361007326,411420301.7 ppb
Big Bear Lake DWP - Big Bear System CA361004426,1321,200400 ppb
Loma Linda, City of CA361001325,129300000 ppb
Phelan Pinon Hills CSD CA361012024,285420000 ppb
Riverside Highland Water Company CA361005720,188180901.5 ppb
Twentynine Palms Water District CA361004918,795420000 ppb
USMC - 29 Palms CA361070316,067600020 ppbat or above the action level
Us Army Fort Irwin CA361070515,70160000 ppb
Loma Linda University CA360015215,368180200 ppb
Sbdno County Service Area 64 CA361012114,911120000 ppb
Muscoy Mwc No. 1 CA361003113,00060000 ppb
Sbdno County Service Area 70j CA361012512,84395000 ppb
Big Bear City CSD CA361000812,738358800 ppb
Crestline Village Cwd - Division 10 CA361001511,6501,560700 ppb
Needles, City of CA36100328,766180003.4 ppb
Western Heights Water Company CA36100537,705120000 ppb
Lake Arrowhead CSD CA36100057,038240800 ppb
Joshua Basin Water District CA36100256,6403000011 ppb
Helendale Community Service District CA36101126,347120700 ppb
Golden State Water Co - Apple Vly South CA36101076,208180000 ppb
Glen Helen Water System CA36001085,900300408 ppb
Running Springs Water District CA36100625,2686601008.1 ppb
Golden State Water Co - Wrightwood CA36100474,177480103.6 ppb
Sheep Creek Water Company CA36101094,00260400 ppb
San Antonio Water Company CA36100853,441240000 ppb
Green Valley Mwc CA36100232,99300124.9 ppbat or above the action level
Arrowhead Villas Mutual Service Company CA36100932,6541800010 ppb
Valley of Enchantment Mwc CA36100512,4710019.8 ppb
Thunderbird Cwd CA36003062,0980010 ppb
Devore Wc CA36101171,5740020 ppb
Barton Flats Water System CA36010481,0700052.8 ppb
Fallsvale Service Company CA36100211,0460010 ppb
Baker Community Services District CA36000221,0000020 ppb
Apple Valley Heights Cwd CA36000099830010 ppb
Juniper Riviera Cwd CA36002228580030 ppb
Apple Valley Foothill Cwd CA36000088110010 ppb
Daggett Comm Svcs Dist CA360008679500330 ppb
Mp Mine Operations LLC CA36001726260010 ppb
Knoll Enterprises CA360050450000710 ppb
Valley View Park Mwc CA36100464990012.5 ppb
Rancheritos Mwc CA3600200487180002 ppb
Csa 70 W-4 Pioneertown CA360019647000230 ppb
Glen Martin Mwc CA36100164500010 ppb
Forest Park Mwc CA36001074060010 ppb
Smiley Park Country Club CA36002603700026.1 ppb
Apple Valley View Mwc CA36000123030030 ppb
Csa 70-F Morongo CA360022630000380 ppb
Bar H Mwc CA360002726000152.9 ppb
Lake Jodie Water System CA36007852500010 ppb
Ironwood Camp CA360101521000410 ppb
Gordon Acres Water Co CA360029720000160 ppb
Calico Lake Homeowners CA36010361500010 ppb
Hi Desert Mwc CA36001231120070 ppb
Chamisal Mwc CA3600071840014.1 ppb
Rancho Pino Verde CA3601085660010 ppb
Brookside MHP CA3600385650014.6 ppb
North Shore Mwc CA3600184700130 ppb
Bighorn - Desert View Water Agency CA36100093,9160000 ppb
Gilbert Street Complex CA36002153,83300012 ppb
Marygold Mwc CA36100283,0550000 ppb
High Desert Detention Center CA36011823,0350000 ppb
Alpine Water Users Association CA36100022,5340000 ppb
Cedarpines Park Mwc CA36100112,4580000 ppb
Terrace Water Company CA36100482,4000000 ppb
Clawa CA36101142,3200000 ppb
Golden State Water Co - Apple Vly North CA36101052,0860000 ppb
Arrowbear Park Cwd CA36101101,8560005 ppb
Searles Valley Minerals Operations INC CA36108541,8180000 ppb
Golden State Water Co - Morongo del Sur CA36100631,7170000.7 ppb
Mt Baldy Homeowners Assn. CA36100331,7000000 ppb
Mariana Ranchos Cwd CA36100301,5020000 ppb
DWP - Fawnskin CA36100221,2710000 ppb
Sbdno County Service Area 70 Cedar Glen CA36100261,2400000 ppb
California Institution for Women CA36108511,1950002.5 ppb
USMC Nebo (Barstow) CA36107011,1260000 ppb
Bdvwa - Goat Mountain Id CA36100601,1180000 ppb
Liberty -Yermo CA36101188610000 ppb
Deer Lodge Water System CA36000878450000 ppb
Lacsd - Rimforest CA36100458170000 ppb
Jubilee Mwc CA36001397820000 ppb
Center Water Co CA36000706620000 ppb
Snowcrest Heights Imp Assoc CA36002626000002.8 ppb
Golden State Water Co - Lucerne CA36101085860001.3 ppb
Oak Glen Retreat CA36001335760002.7 ppb
Palms River Resort CA36003725310000 ppb
Csa 42 Oro Grande CA36002205290000 ppb
Sky Forest Mwc CA36002584920000 ppb
Lytle Springs Wc CA36001584750000 ppb
Strawberry Lodge Mwc CA36003013810009.3 ppb
Golden State Water Morongo Delnorte CA36002703730000 ppb
Olive Dell Ranch CA36001873500000 ppb
Desert Springs Mwc CA36000893250000 ppb
Mill Creek Msc CA36001663150000 ppb
Big Pine Tract CA36000313000000 ppb
Rancheritos #2 CA36011862910000 ppb
Moss Mobile Manor CA36003972900000 ppb
Navajo Mwc CA36001802640000 ppb
Department of Water and Power CA36002832390002.5 ppb
Dogwood Blue Jay Cyn Imp CA36000942320000 ppb
Lucerne Valley Mwc CA36001562280000 ppb
Lucerne Vista Mwc CA36001572240000 ppb
Crystal Lake Property Owners CA36010101860000 ppb
Apple Valley Village Mhe CA36004001800000 ppb
Oak Glen Domestic Water CA36001851800000 ppb
River Ranch MHP CA36001551760002.8 ppb
Bermuda Palms 0906001301720001.5 ppb
Liberty-Bellview Heights CA36000101550000.3 ppb
Bear Valley MHP CA36010451500000 ppb
Desert Dawn Mwc CA36000881500000 ppb
MWD of So Cal Gene Plant CA36003831350000 ppb
Golden State Water Desert View CA36002791200000 ppb
San Antonio Canyon Msc CA36100821190003.7 ppb
Paradise Mobile Estates CA36003991060000 ppb
Upper Little Bear Mountain Club CA36004461010000 ppb
West End Mwc CA3600345900000 ppb
Cdf - Oak Glen Conservation Camp CA3610800830006.8 ppb
Rocky Comfort Mutual Water Co CA3600209710000 ppb
Foothill Estates MHP CA36003866600071 ppbat or above the action level
Cdf - Pilot Rock Conservation Camp CA3610801650000 ppb
Camp Waterman Mwc CA3600064550000 ppb
MWD of So Cal Iron Mountain CA3600382360002 ppb
San Bernardino Valley WD CA3610019109,608000not reported
Chino Basin Desalter Auth. - Desalter 1 CA36100750000not reported
Mojave Water Agency CA36101290000not reported
Water Facilities Authority-Jpa CA36100060000not reported
West End Consolidated Water Company CA36100860000not reported

Shaded rows report lead at or above the 15 ppb action level in their latest monitoring period. EPA sets that level for the value 9 in 10 sampled homes fall at or below; reaching it requires the utility to act, and it is not a measurement of any single tap. 3 systems in this table are at or above it. What an action level means

USGS · Monitoring stations

The water, more recently.

Available station readings in San Bernardino County, California. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

Station coverage and available measurements vary by county.

Explore USGS Water Data
How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed · Source updated

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed · Source updated

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed · Source updated

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in San Bernardino County

91ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

  • Adelanto
  • Apple Valley
  • Baker
  • Barstow
  • Big Bear City
  • Big Bear Lake
  • Big River
  • Bloomington
  • Chino
  • Chino Hills
  • Colton
  • Crestline
  • Fontana
  • Fort Irwin
  • Grand Terrace
  • Hesperia
  • Highland
  • Homestead Valley
  • Joshua Tree
  • Lake Arrowhead
  • Loma Linda
  • Lucerne Valley
  • Lytle Creek
  • Mentone
  • Montclair
  • Morongo Valley
  • Needles
  • Oak Hills
  • Ontario
  • Phelan
  • Piñon Hills
  • Rancho Cucamonga
  • Redlands
  • Rialto
  • Running Springs
  • San Bernardino
  • Searles Valley
  • Silver Lakes
  • Twentynine Palms
  • Upland
  • Victorville
  • Yermo
  • Yucaipa
  • Yucca Valley
Explore water-system recordsFind water-testing resources
View ZIP areas and understand coverage
  • 91701Rancho Cucamonga
  • 91708Chino
  • 91709Chino Hills
  • 91710Chino
  • 91730Rancho Cucamonga
  • 91737Rancho Cucamonga
  • 91739Rancho Cucamonga
  • 91761Ontario
  • 91762Ontario
  • 91763Montclair
  • 91764Ontario
  • 91784Upland
  • 91786Upland
  • 92242Big River
  • 92252Joshua Tree
  • 92256Morongo Valley
  • 92267
  • 92268
  • 92277Twentynine Palms
  • 92278Twentynine Palms
  • 92280
  • 92284Yucca Valley
  • 92285Homestead Valley
  • 92301Adelanto
  • 92304
  • 92305
  • 92307Apple Valley
  • 92308Apple Valley
  • 92309Baker
  • 92310Fort Irwin
  • 92311Barstow
  • 92313Grand Terrace
  • 92314Big Bear City
  • 92315Big Bear Lake
  • 92316Bloomington
  • 92317Lake Arrowhead
  • 92321Lake Arrowhead
  • 92322Crestline
  • 92324Colton
  • 92325Crestline
  • 92327
  • 92332
  • 92333
  • 92335Fontana
  • 92336Fontana
  • 92337Fontana
  • 92338
  • 92339
  • 92341Running Springs
  • 92342Silver Lakes
  • 92344Oak Hills
  • 92345Hesperia
  • 92346Highland
  • 92347Barstow
  • 92350Loma Linda
  • 92352Lake Arrowhead
  • 92354Loma Linda
  • 92356Lucerne Valley
  • 92358Lytle Creek
  • 92359Mentone
  • 92363Needles
  • 92364
  • 92365
  • 92368Victorville
  • 92369San Bernardino
  • 92371Phelan
  • 92372Piñon Hills
  • 92373Redlands
  • 92374Redlands
  • 92376Rialto
  • 92377Rialto
  • 92378Lake Arrowhead
  • 92382Running Springs
  • 92385Lake Arrowhead
  • 92386Big Bear City
  • 92391Lake Arrowhead
  • 92392Victorville
  • 92394Victorville
  • 92395Victorville
  • 92398Yermo
  • 92399Yucaipa
  • 92401San Bernardino
  • 92404San Bernardino
  • 92405San Bernardino
  • 92407San Bernardino
  • 92408San Bernardino
  • 92410San Bernardino
  • 92411San Bernardino
  • 92415San Bernardino
  • 93558
  • 93562Searles Valley

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASChoosing a PFAS filterPFAS was found in 24 of the 49 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter51 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near San Bernardino County

All California counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.

Keep exploring

Every record tells
part of the story.

Find a place. Read the measurements.
Understand the context.

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