Page 109 - Beaumont Basin Watermaster

Section 4
Water Quality Conditions

water standard for TDS (500 mg/L). BCVWD wells along Edgar Canyon were not included in
the analysis of domestic wells.

In the Singleton Basin / Edgar Canyon area, four wells had a maximum concentration below
the anti-degradation objective, nine wells were between the anti-degradation and maximum
benefit objective of 330 mg/L, and the remaining two wells exceeded the maximum objective,
no wells exceeded the secondary drinking standard.

In the South Beaumont Basin, none of the wells had a maximum TDS concentration below the
anti-degradation objective, two wells were between this and the maximum objective, and the
remaining seven wells exceeded the maximum objective. Most of the wells with the highest
TDS concentrations are located in the South Beaumont Basin. Table 4-1 presents the
average and maximum TDS and Nitrate (as N) concentration for all the wells in the Beaumont
Basin and surrounding areas.

4.1.2 Nitrate-Nitrogen
Figure 4-3 shows the maximum Nitrate-N concentrations for 53 wells measured within and in
the vicinity of the Beaumont Basin wells during the 2014-2018 reporting period. A total of 30
wells are located inside the basin with the remaining 23 in the Singleton Basin / Edgar Canyon
and the South Beaumont Basin areas.

Maximum Nitrate-N concentrations for domestic wells owned by
Appropriators ranged from 1.11 to 7.33 mg/L and averaged
This section to be Updated in the 2.76 mg/L. Maximum concentrations for overlying wells was
FINAL Report slightly higher as they ranged from 1.90 to 7.11 mg/L and
averaged 3.91 mg/L. The average concentration for all potable
wells was 2.57 mg/L.

In the Singleton Basin / Edgar Canyon area, the maximum Nitrate-N concentration ranged
from 0.81 to 14.0 mg/L and averaged 3.94 mg/L. The average concentration for all samples in
this area was 3.06 mg/L.

In the South Beaumont Basin, the maximum Nitrate-N concentration ranged from 4.2 to 17.0
mg/L and averaged 11.36 mg/L. The average concentration for all samples in this area was
10.45 mg/L.

Average and maximum Nitrate-N concentrations for all sampled wells within the basin are as
follows:

Beaumont Basin Watermaster 2018 Annual Report – DRAFT - February 2019 4-3