Year by year changes in regional percentiles for manganese in groundwater, based on site-specific median values
| Figure 1 | National and regional summary statistics for state and trends in key indicators of groundwater quality based on data collected from 1995 to 2008 |
|---|---|
| Figure 2 | Year by year change in percentage of New Zealand monitoring sites exceeding guidelines for human consumption and ecosystem protection |
| Figure 3 | Year by year changes in regional percentiles for nitrate-nitrogen in groundwater, based on site-specific median values |
| Figure 4 | Year by year changes in regional percentiles for ammoniacal nitrogen in groundwater, based on site-specific medians |
| Figure 5 | Year by year changes in regional percentiles for E. coli in groundwater, based on site-specific median values |
| Figure 6 | Year by year changes in regional percentiles for dissolved iron in groundwater, based on site-specific median values |
| Figure 7 | |
| Figure 8 | Year by year changes in regional percentiles for electrical conductivity in groundwater, based on site-specific medians |
| Figure 9 | Relationships between site specific median nitrate-nitrogen and well depth and aquifer confinement |
| Figure 10 | Relationships between detection of E. coli and well depth and aquifer confinement |
| Figure 11 | Relationships between median electrical conductivity and well depth and aquifer confinement |
Figures
September 2009
© Ministry for the Environment