From: Assessment of urban groundwater quality using Piper trilinear and multivariate techniques: a case study in the Abuja, North-central, Nigeria
Cluster 1
Cluster 2
Cluster 3
Cluster 4
pH
TDS
EC
Cl−
Temp
\( {{\text{SO}}_{4}}^{2 - } \)
AlK
HCO3−
\( {{\text{CO}}_{3}}^{2 - } \)
Na+
\( {{\text{NO}}_{3}}^{ - } \)
TH
F−
K+
Fe2+
Ca2+
Mg2+
Mn
SiO2