Valley summary - by GSAs, subbasins
The numbers the map's panels show, every subbasin on one page. Readings through Sep 2026; scenario: NOAA outlook for water year 2027, about 122% of normal precipitation (issued Oct 2026). Click a header to sort (blanks last), a name to open it on the map. Hover a header for what it counts.
| Subbasin | Code | Status | Depth now, ft | Since 2015, ft | Scenario month 12, ft | Month 12 vs now, ft | RMS below MT, now | RMS below MT, scenario | RMS behind IM path, now | RMS behind IM path, scenario | Plans with UR, now | Plans with UR, scenario | Domestic at risk, normal year | Domestic at risk, scenario | Subsidence 12 mo, ft | Recharge soil near canal, acres | Wells read, 12 mo | Per 100 sq mi | 80 % range at 12 mo, ft |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Antelope | 5-021.54 | – | 41.0 | +4.1 | 39.0 | −2.0 | 0 of 2 | 0 of 2 | 1 of 2 | 1 of 2 | 0 of 1 | 0 of 1 | 3 of 415 | 3 of 415 | −0.01 | 0 | 19 | 63.8 | 5.3 |
| Bend | 5-021.53 | – | 46.0 | +2.3 | 44.1 | −1.9 | – | – | – | – | – | – | 1 of 49 | 1 of 49 | 0.00 | 0 | 1 | 2.8 | 13.2 |
| Butte | 5-021.70 | – | 13.1 | −1.6 | 11.6 | −1.5 | 0 of 50 | 0 of 50 | 10 of 50 | 7 of 50 | 0 of 1 | 0 of 1 | 4 of 203 | 4 of 203 | +0.01 | 6,083 | 77 | 18.5 | 4.3 |
| Chowchilla | 5-022.05 | COD | 209.4 | +40.4 | 201.7 | −7.7 | 13 of 30 | 9 of 24 | 2 of 30 | 2 of 24 | 0 of 1 | 1 of 1 | 30 of 314 | 28 of 314 | −0.21 | 4,076 | 56 | 24.6 | 12.8 |
| Colusa | 5-021.52 | – | 75.8 | +20.4 | 72.2 | −3.6 | 0 of 39 | 0 of 38 | 13 of 39 | 8 of 38 | 0 of 2 | 0 of 2 | 137 of 1,326 | 122 of 1,326 | −0.01 | 6,959 | 226 | 20.0 | 9.9 |
| Corning | 5-021.51 | – | 108.3 | +21.2 | 104.1 | −4.2 | 7 of 46 | 2 of 46 | 41 of 46 | 37 of 46 | 2 of 2 | 1 of 2 | 97 of 1,161 | 86 of 1,161 | −0.01 | 1,643 | 90 | 27.8 | 7.4 |
| Cosumnes | 5-022.16 | – | 98.3 | −8.3 | 97.0 | −1.3 | 0 of 16 | 1 of 11 | 6 of 16 | 4 of 11 | 0 of 1 | 0 of 1 | 7 of 889 | 6 of 889 | −0.02 | 0 | 32 | 9.7 | 12.8 |
| Delta-Mendota | 5-022.07 | COD | 88.3 | +3.5 | 80.3 | −8.0 | 5 of 90 | 2 of 88 | 12 of 90 | 4 of 88 | 0 of 7 | 0 of 7 | 32 of 976 | 31 of 976 | −0.02 | 21,860 | 125 | 10.5 | 9.5 |
| East Contra Costa | 5-022.19 | – | 21.0 | −1.5 | 18.1 | −2.9 | 0 of 11 | 0 of 10 | 7 of 11 | 6 of 10 | 0 of 1 | 0 of 1 | 10 of 529 | 8 of 529 | −0.01 | 5,178 | 41 | 24.4 | 5.3 |
| Eastern San Joaquin | 5-022.01 | COD | 99.2 | +12.7 | 98.4 | −0.8 | 0 of 22 | 0 of 20 | 11 of 21 | 9 of 19 | 0 of 1 | 0 of 1 | 62 of 3,261 | 60 of 3,261 | −0.02 | 13,378 | 121 | 10.1 | 9.9 |
| Kaweah | 5-022.11 | COD | 124.2 | +1.9 | 115.3 | −8.9 | 4 of 80 | 3 of 46 | 8 of 80 | 4 of 46 | 0 of 3 | 0 of 3 | 61 of 1,679 | 44 of 1,679 | −0.15 | 12,111 | 103 | 14.9 | 14.1 |
| Kern County | 5-022.14 | COD | 281.9 | +1.1 | 272.8 | −9.1 | 1 of 169 | 0 of 95 | 15 of 165 | 5 of 92 | 0 of 11 | 0 of 11 | 38 of 544 | 35 of 544 | −0.02 | 226,470 | 315 | 11.3 | 19.2 |
| Kings | 5-022.08 | COD | 120.9 | +9.9 | 114.0 | −6.9 | 0 of 111 | 0 of 107 | 28 of 111 | 12 of 107 | 0 of 7 | 0 of 7 | 341 of 5,786 | 298 of 5,786 | −0.03 | 98,596 | 183 | 11.9 | 10.3 |
| Los Molinos | 5-021.56 | – | 78.1 | +10.3 | 77.0 | −1.1 | 0 of 7 | 0 of 7 | 1 of 6 | 0 of 6 | 0 of 1 | 0 of 1 | 12 of 252 | 12 of 252 | +0.01 | 75 | 45 | 29.1 | 4.3 |
| Madera | 5-022.06 | COD | 252.7 | +66.0 | 246.1 | −6.6 | 27 of 48 | 23 of 36 | 3 of 48 | 1 of 36 | 4 of 4 | 4 of 4 | 699 of 2,717 | 676 of 2,717 | −0.11 | 7,008 | 63 | 11.6 | 42.8 |
| Merced | 5-022.04 | COD | 107.2 | +12.4 | 104.2 | −3.0 | 7 of 24 | 7 of 24 | 1 of 23 | 0 of 23 | 1 of 1 | 1 of 1 | 18 of 2,330 | 17 of 2,330 | −0.02 | 18,672 | 66 | 8.2 | 9.9 |
| Modesto | 5-022.02 | – | 98.1 | +25.6 | 96.8 | −1.3 | 13 of 62 | 9 of 33 | 0 of 13 | 0 of 13 | 0 of 1 | 1 of 1 | 23 of 1,031 | 22 of 1,031 | −0.01 | 40,023 | 71 | 18.5 | 6.9 |
| North American | 5-021.64 | – | 61.4 | −4.3 | 59.6 | −1.8 | 0 of 39 | 0 of 38 | 14 of 39 | 14 of 38 | 0 of 1 | 0 of 1 | 13 of 628 | 13 of 628 | −0.01 | 7,516 | 127 | 23.8 | 4.3 |
| North Yuba | 5-021.60 | – | 23.6 | −8.3 | 20.9 | −2.7 | 0 of 13 | 0 of 13 | 3 of 13 | 3 of 13 | 0 of 1 | 0 of 1 | 3 of 142 | 3 of 142 | −0.01 | 2,037 | 41 | 43.2 | 4.4 |
| Pleasant Valley | 5-022.10 | – | 430.2 | +52.7 | 411.6 | −18.6 | 0 of 5 | 0 of 5 | 3 of 5 | 3 of 5 | – | – | 1 of 14 | 1 of 14 | −0.04 | 0 | 25 | 33.2 | 42.8 |
| Red Bluff | 5-021.50 | – | 85.6 | +7.7 | 81.7 | −3.9 | 0 of 5 | 0 of 5 | 5 of 5 | 5 of 5 | 1 of 1 | 0 of 1 | 100 of 1,622 | 91 of 1,622 | −0.02 | 6,626 | 40 | 9.4 | 6.5 |
| Solano | 5-021.66 | – | 42.4 | +0.8 | 37.3 | −5.1 | 4 of 34 | 3 of 30 | 27 of 34 | 23 of 30 | 0 of 1 | 0 of 1 | 64 of 500 | 64 of 500 | −0.02 | 1,300 | 65 | 11.7 | 6.1 |
| South American | 5-021.65 | – | 64.0 | −10.9 | 62.8 | −1.2 | 3 of 42 | 2 of 38 | 4 of 42 | 4 of 38 | 0 of 1 | 0 of 1 | 2 of 337 | 2 of 337 | −0.01 | 7,266 | 45 | 11.6 | 6.9 |
| South Yuba | 5-021.61 | – | 27.0 | −7.4 | 25.3 | −1.7 | 0 of 18 | 0 of 18 | 1 of 18 | 0 of 18 | 0 of 1 | 0 of 1 | 0 of 66 | 0 of 66 | −0.01 | 1,776 | 60 | 35.1 | 7.4 |
| Sutter | 5-021.62 | – | 12.3 | −4.3 | 10.3 | −2.0 | 0 of 51 | 0 of 49 | 18 of 51 | 14 of 49 | 0 of 1 | 0 of 1 | 1 of 329 | 1 of 329 | −0.01 | 5,378 | 59 | 13.2 | 4.3 |
| Tracy | 5-022.15 | – | 55.8 | +12.5 | 51.4 | −4.4 | 1 of 15 | 1 of 14 | 6 of 15 | 3 of 14 | 0 of 1 | 0 of 1 | 20 of 469 | 18 of 469 | −0.02 | 1,962 | 50 | 13.4 | 9.0 |
| Tulare Lake | 5-022.12 | COD, Probation | 205.8 | −28.7 | 192.3 | −13.5 | 3 of 53 | 3 of 42 | 5 of 9 | 4 of 6 | 0 of 1 | 0 of 1 | 149 of 856 | 119 of 856 | −0.16 | 10,633 | 65 | 7.8 | 32.4 |
| Tule | 5-022.13 | COD, Probation | 221.8 | +5.1 | 214.0 | −7.8 | 4 of 42 | 1 of 9 | 12 of 40 | 4 of 9 | 1 of 3 | 1 of 3 | 73 of 778 | 72 of 778 | −0.16 | 20,888 | 68 | 9.1 | 24.0 |
| Turlock | 5-022.03 | – | 95.1 | −4.4 | 93.8 | −1.3 | 12 of 45 | 13 of 43 | 2 of 19 | 1 of 17 | 1 of 1 | 1 of 1 | 17 of 1,702 | 14 of 1,702 | −0.01 | 87,050 | 137 | 25.2 | 15.7 |
| Vina | 5-021.57 | – | 60.0 | −0.3 | 57.7 | −2.3 | 0 of 18 | 0 of 18 | 1 of 18 | 1 of 18 | 0 of 1 | 0 of 1 | 19 of 631 | 17 of 631 | 0.00 | 5,838 | 75 | 26.0 | 10.7 |
| Westside | 5-022.09 | COD | 265.2 | −79.0 | 246.7 | −18.5 | 1 of 57 | 1 of 50 | 1 of 47 | 1 of 41 | 2 of 2 | 2 of 2 | 0 of 24 | 0 of 24 | 0.00 | 16,078 | 88 | 9.0 | 45.3 |
| White Wolf | 5-022.18 | – | 508.9 | −26.5 | 501.7 | −7.2 | 0 of 12 | 0 of 2 | 5 of 12 | 0 of 2 | 0 of 1 | 0 of 1 | 0 of 2 | 0 of 2 | −0.01 | 15,427 | 25 | 14.8 | 19.0 |
| Wyandotte Creek | 5-021.69 | – | 54.5 | −0.6 | 51.7 | −2.8 | 0 of 9 | 0 of 9 | 1 of 9 | 1 of 9 | 0 of 1 | 0 of 1 | 19 of 293 | 18 of 293 | 0.00 | 489 | 15 | 16.2 | 4.8 |
| Yolo | 5-021.67 | – | 62.3 | +7.6 | 56.2 | −6.1 | 1 of 57 | 0 of 56 | 27 of 57 | 28 of 56 | 0 of 1 | 0 of 1 | 14 of 783 | 13 of 783 | −0.01 | 12,721 | 334 | 39.5 | 6.1 |
Reading this table
- Sorting ranks rows; it does not grade them. A deep or fast-falling area is not a failing one: plans set their own thresholds, and the typical-error column (always shown) says how far to trust each forecast.
- Subbasin RMS counts take each plan's RMS well once, across the GSAs that share it.
- Well counts are DWR's periodic dataset (what this map is built from); a GSA's own network on the SGMA Portal may hold more readings.
- Probationary (State Water Board, checked 2026-10-21): Tulare Lake (5-022.12, since Apr 2024); Tule (5-022.13, since Sep 2024).
- Plan rules are applied to water levels only, from each plan's own table.
Cite
Gray, W. (2026). Central Valley Groundwater Map and Forecast, release 2026-09.5cdfad9c (readings through Sep 2026) [Data set]. CC BY 4.0. https://groundwater-map-175591637760.us-west1.run.app/release/2026-09.5cdfad9c
Central Valley Groundwater Map and Forecast (Gray, W.). CC BY-NC 4.0.