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Water Quality Results

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Distribution System Monitoring

Monthly samples are taken at four dedicated sampling stations located throughout the City’s water distribution system. The locations for these sites were chosen to reflect the overall water quality of the system. Samples are analyzed for boron, calcium, magnesium, hardness (as CaCO3), and free chlorine.

Most Recent Water Hardness and Boron Test Results (April 8, 2026)

  Location

 Water Hardness (CaCO3) 
grains per gallon*

Water Hardness (CaCO3) 
milligrams per liter 

 Boron 
milligrams per liter
Whaleback Park (West Davis) 4.21 72 <0.100
Mockingbird Place (North Davis) 4.15 71 <0.100
El Macero Drive (South Davis) 4.15 71 <0.100
1st Street (Central Davis) 4.33 74 <0.100
Alhambra Drive (East Davis) 4.27 73 <0.100
 *grains per gallon is calculated by dividing the milligrams per liter result by 17.1

Annual Water Hardness Test Results

Location Analyte Units Jan 2026 Feb 2026 Mar 2026 Apr 2026 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025
Whaleback Park (West Davis)

Hardness (CaCO3)

 grains per gallon  3.22  4.33  3.92  4.21 5.20  5.44  3.27  4.50  4.97  3.33  3.80  5.15
Mockingbird Place (North Davis) Hardness (CaCO3) grains per gallon 3.16  4.21  4.33 4.15  5.09  5.26  3.63  4.62  4.50  3.63  4.15  4.97
El Macero Drive (South Davis) Hardness (CaCO3) grains per gallon  3.45  3.74  3.92  4.15  3.51  3.98  3.04  3.74  3.98  3.33  3.86  5.20
1st Street (Central Davis) Hardness (CaCO3) grains per gallon 3.33 3.57   3.98  4.33  4.74  4.56  3.33  5.44  4.39  3.16  4.39  4.80
Alhambra Drive (East Davis) Hardness (CaCO3) grains per gallon  3.39 4.04   3.92 4.27  3.80  4.21  3.27  3.80  3.86  3.16  4.39  4.91
*milligrams per liter is calculated by multiplying the grains per gallon by 17.1

Annual Boron Test Results

Location Analyte Units Jan 2026 Feb 2026 Mar 2026 Apr 2026 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025
Whaleback Park (West Davis) Boron milligrams per liter <0.100 0.140 <0.100 <0.100 0.400 0.470 <0.100 0.190 0.200 <0.100 <0.100
 <0.100
Mockingbird Place (North Davis) Boron milligrams per liter <0.100 0.110 <0.100 <0.100 0.390 0.470 0.120 0.250 0.150 0.100
 0.120
 <0.100
El Macero Drive (South Davis) Boron milligrams per liter <0.100 0.150 <0.100 <0.100 0.280 0.410 0.110 0.230 0.110 <0.100
 0.280 <0.100
1st Street (Central Davis) Boron milligrams per liter <0.100 <0.100 <0.100 <0.100 0.280 0.320 0.110 0.300 0.120 <0.100
 0.200 <0.100
Alhambra Drive (East Davis) Boron milligrams per liter <0.100 0.200 <0.100 <0.100 0.220 0.350 0.140 0.190 <0.100
 <0.100
 0.360 <0.100
 

After treatment at the Regional Water Treatment Facility in Woodland, the finished surface water is dosed with phosphoric acid to create ortho-phosphate for corrosion control. The target residual is 2.5 milligrams per liter prior to entering the transmission line.