County · California
Butte County, California: drinking water records
Explore EPA records for 41 community water systems across 20 ZIP codes in Butte 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 6 of the 41 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 41 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 |
|---|---|---|---|---|---|
| Thermalito Water & Sewer Dist CA0410008 | 12,136 | 256 | 1 | 1 | 0 ppbbelow the action level |
| City of Gridley CA0410004 | 7,269 | 300 | 6 | 1 | 0 ppbbelow the action level |
| Cal-Water Service Co.-Chico CA0410002 | 114,925 | 2,220 | 6 | 0 | 0 ppbbelow the action level |
| South Feather W&p - Miners Ranch CA0410006 | 22,664 | 120 | 0 | 0 | 5.2 ppbbelow the action level |
| Cal-Water Service Co.-Oroville CA0410005 | 11,106 | 180 | 1 | 0 | 0.9 ppbbelow the action level |
| Paradise Irrigation District CA0410007 | 9,142 | 180 | 0 | 0 | 0 ppbbelow the action level |
| City of Biggs CA0410001 | 2,060 | 0 | 0 | 1 | 6.9 ppbbelow the action level |
| Sierra Moon Mutual Water Company CA0409183 | 450 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Pleasant Grove MHP CA0400020 | 327 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Almond Grove Mobile Park CA0400040 | 253 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Foothills Manufactured Home Communuty CA0400027 | 180 | 0 | 0 | 1 | 2.0 ppbbelow the action level |
| Forest Ranch Mutual Water System CA0400004 | 119 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Humboldt Woodlands Mutual CA0400149 | 55 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Meadowbrook Oaks CA0400026 | 50 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Forest Knolls Mutual Water Co CA0400078 | 46 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Mountain Village Homeowner'S Assoc CA0400090 | 45 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Hartley Mutual Water System CA0400003 | 41 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Robinson'S Corner MHP CA0400021 | 20 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Del Oro Water Co.-Paradise Pines CA0410011 | 10,940 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Durham Irrigation District CA0410003 | 1,581 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Del Oro Water Co.-Lime Saddle Marina CA0405001 | 895 | 0 | 0 | 0 | 0.9 ppbbelow the action level |
| Del Oro Water Co.-Stirling Bluffs CA0410018 | 521 | 0 | 0 | 0 | 7.3 ppbbelow the action level |
| Gridley Farm Labor Housing CA0400012 | 460 | 0 | 0 | 0 | 3.4 ppbbelow the action level |
| Butte Creek Estates Mutual Water Co CA0400007 | 399 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Del Oro Water Co.-Magalia CA0410009 | 340 | 0 | 0 | 0 | 1.6 ppbbelow the action level |
| Lake Madrone Water District CA0400014 | 297 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gran Mutual Water Co CA0400008 | 290 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Golden Feather MHP CA0400030 | 275 | 0 | 0 | 0 | 0.9 ppbbelow the action level |
| Dingerville USA Park CA0400051 | 220 | 0 | 0 | 0 | 6.9 ppbbelow the action level |
| Keefer Creek Estates CA0400151 | 160 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Youth With a Mission-Springs of Living W CA0400001 | 150 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Del Oro Water Company - Buzztail Dist. CA0400091 | 106 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Merry Mountain Mutual CA0400013 | 90 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Blue Oak Terrace Mutual CA0409181 | 81 | 0 | 0 | 0 | 2.6 ppbbelow the action level |
| Oroville Mobile Home Park CA0400019 | 76 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Golden Oaks Mobile Home Park CA0400023 | 75 | 0 | 0 | 0 | 0 ppbbelow the action level |
| South Feather W&p - Bangor CA0410012 | 73 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Humboldt Highlands Mutual CA0400123 | 58 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Berry Creek Community Service Dist CA0400016 | 28 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Forest Village LLC CA0400042 | 28 | 0 | 0 | 0 | 6.3 ppbbelow the action level |
| Falling Rock RV Park CA0400117 | 25 | 0 | 0 | 0 | not reported |
USGS · Monitoring stations
The water, more recently.
Available station readings in Butte 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 Butte County
20ZIP 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
- Bangor
- Berry Creek
- Biggs
- Chico
- Clipper Mills
- Cohasset
- Concow
- Durham
- Forbestown
- Forest Ranch
- Gridley
- Magalia
- Oroville East
- Palermo
- Paradise
- Richvale
- Stirling City
View ZIP areas and understand coverage
- 95914Bangor
- 95916Berry Creek
- 95917Biggs
- 95926Chico
- 95928Durham
- 95929Chico
- 95930Clipper Mills
- 95938Durham
- 95941Forbestown
- 95942Forest Ranch
- 95948Gridley
- 95954Magalia
- 95958Durham
- 95965Concow
- 95966Oroville East
- 95968Palermo
- 95969Paradise
- 95973Cohasset
- 95974Richvale
- 95978Stirling City
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.