County · California
Riverside County, California: drinking water records
Explore EPA records for 93 community water systems across 71 ZIP codes in Riverside County, then find water-testing resources and available recent monitoring-station readings.
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 31 of the 93 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.
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 93 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Lake Hemet MWD CA3310022 | 52,913 | 570 | 0 | 1 | 0 ppbbelow the action level |
| Norco, City of CA3310025 | 25,068 | 420 | 7 | 1 | 0 ppbbelow the action level |
| Nuevo Water Company CA3310026 | 6,733 | 120 | 5 | 5 | 2.9 ppbbelow the action level |
| Eastern Municipal WD CA3310009 | 666,581 | 1,030 | 0 | 0 | 2.8 ppbbelow the action level |
| Riverside, City of CA3310031 | 298,398 | 120 | 3 | 0 | 1 ppbbelow the action level |
| Coachella Vwd: Cove Community CA3310001 | 270,000 | 1,200 | 0 | 0 | 0 ppbbelow the action level |
| Elsinore Valley MWD CA3310012 | 169,455 | 656 | 1 | 0 | 1.3 ppbbelow the action level |
| Corona, City of CA3310037 | 168,575 | 1,620 | 4 | 0 | 3.7 ppbbelow the action level |
| Rancho California Water District CA3310038 | 146,147 | 2,311 | 8 | 0 | 0 ppbbelow the action level |
| Jurupa Community Sd CA3310021 | 135,093 | 540 | 0 | 0 | 0 ppbbelow the action level |
| Western MWD CA3310049 | 86,062 | 360 | 3 | 0 | 1.3 ppbbelow the action level |
| Indio Water Authority CA3310020 | 84,757 | 780 | 0 | 0 | 0 ppbbelow the action level |
| Desert Water Agency CA3310005 | 74,807 | 660 | 0 | 0 | 0 ppbbelow the action level |
| Beaumont Cherry Valley WD CA3310002 | 66,841 | 600 | 0 | 0 | 7.8 ppbbelow the action level |
| Coachella Water Authority CA3310007 | 43,590 | 330 | 0 | 0 | 0 ppbbelow the action level |
| Mission Springs WD CA3310008 | 43,484 | 420 | 0 | 0 | 0 ppbbelow the action level |
| Rubidoux Community Sd CA3310044 | 36,827 | 120 | 3 | 0 | 1.6 ppbbelow the action level |
| Hemet, City of CA3310016 | 33,828 | 180 | 0 | 0 | 0 ppbbelow the action level |
| Banning, City of CA3310006 | 31,680 | 720 | 1 | 0 | 0 ppbbelow the action level |
| Temescal Valley Water District CA3310074 | 21,971 | 120 | 0 | 0 | 0 ppbbelow the action level |
| San Jacinto, City of CA3310032 | 18,950 | 180 | 0 | 0 | 1.2 ppbbelow the action level |
| Western MWD - Murrieta Division CA3310036 | 17,453 | 240 | 3 | 0 | 1.5 ppbbelow the action level |
| South Mesa Wc CA3310017 | 10,108 | 480 | 4 | 0 | 0 ppbbelow the action level |
| Blythe - City of CA3310003 | 9,798 | 180 | 0 | 0 | 5.5 ppbbelow the action level |
| Myoma Dunes Mutual Water Company CA3310051 | 9,445 | 300 | 0 | 0 | 0 ppbbelow the action level |
| Santa Ana River Water Company CA3310033 | 5,848 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Coachella Vwd: I.D. No. 8 CA3310048 | 4,600 | 240 | 0 | 0 | 0 ppbbelow the action level |
| California Rehabilitation Center - Norco CA3310800 | 4,300 | 60 | 1 | 0 | 0 ppbbelow the action level |
| Chuckawalla Valley State Prison CA3310802 | 4,090 | 60 | 0 | 0 | 1 ppbbelow the action level |
| Farm Mutual W.C. (The) CA3310046 | 4,026 | 120 | 5 | 0 | 0 ppbbelow the action level |
| Idyllwild Water District CA3310019 | 3,762 | 0 | 0 | 4 | 2.9 ppbbelow the action level |
| Glen Ivy Hot Springs CA3301294 | 1,087 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Riverside Csa #122-Mesa Verde CA3310028 | 766 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Csa 62 CA3301577 | 614 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Carver Tract Mutual Water Comp CA3301107 | 600 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Glen Eden Sun Club CA3301283 | 566 | 0 | 0 | 3 | 0 ppbbelow the action level |
| Fisherman'S Retreat CA3301267 | 352 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Ramona Water Company CA3301529 | 250 | 0 | 0 | 24 | 0 ppbbelow the action level |
| Anza Mutual Water Company CA3301180 | 224 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Rancho Carrillo Mwc CA3301535 | 210 | 0 | 0 | 3 | 5.0 ppbbelow the action level |
| Alpine Village CA3301491 | 198 | 0 | 0 | 25 | 0 ppbbelow the action level |
| Ortega Oaks RV Park&campground CA3301482 | 180 | 0 | 0 | 4 | 0 ppbbelow the action level |
| Amezcua - Garcia Water CA3301990 | 170 | 0 | 0 | 4 | 0 ppbbelow the action level |
| Thomas Mountain Water Company CA3301676 | 157 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Stone Creek Water Company CA3301011 | 152 | 0 | 0 | 1 | 8.5 ppbbelow the action level |
| Valley View Trailer Park CA3301717 | 135 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Pinyon Crest HOA CA3301511 | 104 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Thermal Park CA3303035 | 73 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Indian Oaks Trailer Park CA3301330 | 70 | 0 | 0 | 20 | 0 ppbbelow the action level |
| Desert View Trailer Park CA3301209 | 60 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Stonewood Canyon Estates CA3301800 | 40 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Box Springs Mutual Wc CA3310004 | 3,382 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Home Gardens County WD CA3310018 | 3,095 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Cabazon Water District CA3310047 | 2,010 | 0 | 0 | 0 | 1.2 ppbbelow the action level |
| Pine Cove Water District CA3310030 | 1,540 | 0 | 0 | 0 | 1.8 ppbbelow the action level |
| Fern Valley WD CA3310040 | 900 | 0 | 0 | 0 | 2.8 ppbbelow the action level |
| Plantation on the Lake Park CA3301943 | 897 | 0 | 0 | 0 | 0 ppbbelow the action level |
| High Valleys Water District CA3301775 | 733 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Lake Hemet-Garner Valley CA3310052 | 709 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Lake Hemet Mwd-Camp Ground CA3310080 | 600 | 0 | 0 | 0 | 3.6 ppbbelow the action level |
| Banning Hts. Mutual Water Co. CA3301031 | 567 | 0 | 0 | 0 | 1.6 ppbbelow the action level |
| Blythe - Mesa Ranch CA3301428 | 558 | 0 | 0 | 0 | 1.7 ppbbelow the action level |
| Chiriaco Summit Water Dist. CA3301115 | 544 | 0 | 0 | 0 | 2.3 ppbbelow the action level |
| West Palm Springs Village CA3310078 | 517 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Golden Era Productions CA3301280 | 500 | 0 | 0 | 0 | 3.5 ppbbelow the action level |
| Csa 51 CA3301381 | 400 | 0 | 0 | 0 | 0.8 ppbbelow the action level |
| Palm Springs Crest CA3310081 | 399 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Blythe - Hidden Beaches CA3301630 | 393 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Sharondale Mesa HOA CA3301879 | 340 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Riverdale Estates CA3301040 | 300 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Rancho Calimesa Mobile Home Park CA3301534 | 296 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Murrieta Palms Mobile Home Park CA3301169 | 237 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Pinyon Pines County Water Dist CA3301512 | 232 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Olivet University CA3301863 | 212 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Cherry Valley Water Company CA3301114 | 210 | 0 | 0 | 0 | 1.9 ppbbelow the action level |
| Anza RV Resort CA3301355 | 203 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Western MWD (Id a - Rainbow) CA3310076 | 192 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Reche Canyon Mutual Water Co. CA3301541 | 150 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Oak Haven Association CA3301528 | 120 | 0 | 0 | 0 | 6.7 ppbbelow the action level |
| Anza Pines Mobile Home Park CA3301018 | 90 | 0 | 0 | 0 | 3.4 ppbbelow the action level |
| Baldy Mountain Ranch CA3301028 | 80 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Mountain Center Cafe CA3301145 | 77 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Bradford Run RV CA3301171 | 75 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Bautista Cc No. 36 CA3310801 | 73 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Harmony Haven CA3301055 | 54 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Trails End Mutual Water Company CA3301682 | 52 | 0 | 0 | 0 | 3.6 ppbbelow the action level |
| Galindo Housing Facility CA3303003 | 50 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Blythe Mobile Home Estates CA3301045 | 35 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Paradise Valley Mwc CA3301502 | 30 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Royal Carrizo HOA CA3301588 | 25 | 0 | 0 | 0 | 0 ppbbelow the action level |
| MWD - Eagle Mountain CA3301226 | 15 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Chino Basin Desalter Auth. - Desalter 2 CA3310083 | 0 | 0 | 0 | 0 | not reported |
| Western MWD (Arlington) CA3310075 | 0 | 0 | 0 | 0 | not reported |
USGS · Monitoring stations
The water, more recently.
Available station readings in Riverside 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.
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.
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.
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.
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.
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 reportsResource 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 Riverside County
71ZIP 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
- Aguanga
- Anza
- Banning
- Beaumont
- Blythe
- Cabazon
- Calimesa
- Canyon Lake
- Cathedral City
- Coachella
- Corona
- Desert Center
- Desert Hot Springs
- Eastvale
- French Valley
- Hemet
- Homeland
- Idyllwild-Pine Cove
- Indian Wells
- Indio
- Jurupa Valley
- La Quinta
- Lake Elsinore
- March ARB
- Mead Valley
- Menifee
- Moreno Valley
- Mountain Center
- Murrieta
- Norco
- North Shore
- Nuevo
- Oasis
- Palm Desert
- Palm Springs
- Perris
- Rancho Mirage
- Riverside
- Sage
- San Jacinto
- Sky Valley
- Temecula
- Temescal Valley
- Thousand Palms
- Whitewater
- Wildomar
View ZIP areas and understand coverage
- 91752Jurupa Valley
- 92201Indio
- 92203Indio
- 92210Indian Wells
- 92211Palm Desert
- 92220Banning
- 92223Beaumont
- 92225Blythe
- 92230Cabazon
- 92234Cathedral City
- 92236Coachella
- 92239Desert Center
- 92240Desert Hot Springs
- 92241Sky Valley
- 92253La Quinta
- 92254North Shore
- 92258Palm Springs
- 92260Palm Desert
- 92262Palm Springs
- 92264Palm Springs
- 92270Rancho Mirage
- 92274Oasis
- 92276Thousand Palms
- 92282Whitewater
- 92320Calimesa
- 92501Riverside
- 92503Riverside
- 92504Riverside
- 92505Riverside
- 92506Riverside
- 92507Riverside
- 92508Riverside
- 92509Jurupa Valley
- 92518March ARB
- 92521Riverside
- 92530Lake Elsinore
- 92532Lake Elsinore
- 92536Aguanga
- 92539Anza
- 92543Hemet
- 92544Sage
- 92545Hemet
- 92548Homeland
- 92549Idyllwild-Pine Cove
- 92551Moreno Valley
- 92553Moreno Valley
- 92555Moreno Valley
- 92557Moreno Valley
- 92561Mountain Center
- 92562Murrieta
- 92563Murrieta
- 92567Nuevo
- 92570Mead Valley
- 92571Perris
- 92582San Jacinto
- 92583San Jacinto
- 92584Menifee
- 92585Menifee
- 92586Menifee
- 92587Canyon Lake
- 92590Temecula
- 92591Temecula
- 92592Temecula
- 92595Wildomar
- 92596French Valley
- 92860Norco
- 92879Corona
- 92880Eastvale
- 92881Corona
- 92882Corona
- 92883Temescal 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.
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.