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Dane County Water Quality Dashboard
Indicator Gauge Icon Legend
Legend Colors
Red is bad, green is good, blue is not statistically different/neutral.
Compared to Distribution
the value is in the best half of communities.
the value is in the 2nd worst quarter of communities.
the value is in the worst quarter of communities.
Compared to Target
meets target; 
does not meet target.
Compared to a Single Value
lower than the comparison value;
higher than the comparison value;
not statistically different from comparison value.
Trend
non-significant change over time; 
significant change over time; 
no change over time.
Compared to Prior Value
higher than the previous measurement period;
lower than the previous measurement period;
no statistically different change from previous measurement period.
Manganese Levels <50ppb in the Water Distribution System
Value
Compared to:
Manganese Levels <50ppb in the Water Distribution System Census Place (City): Madison
Manganese Levels <50ppb in the Water Distribution System Census Place (City): Madison
100.0
Ppb
(2021)
Compared to:
Prior Value
(100.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Manganese Levels <50ppb in Public Well Samples
Value
Compared to:
Manganese Levels <50ppb in Public Well Samples Census Place (City): Madison
Manganese Levels <50ppb in Public Well Samples Census Place (City): Madison
95.2
Ppb
(2021)
Compared to:
Prior Value
(100.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Results of Nitrate Testing of >10ppm in Private Wells
Value
Compared to:
Results of Nitrate Testing of >10ppm in Private Wells County: Dane
Results of Nitrate Testing of >10ppm in Private Wells County: Dane
30.0
Ppm
(2021)
Compared to:
Prior Value
(47.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Results of Nitrate Testing of >10ppm in Public Wells
Value
Compared to:
Results of Nitrate Testing of >10ppm in Public Wells County: Dane
Results of Nitrate Testing of >10ppm in Public Wells County: Dane
6.6
Ppm
(2021)
Compared to:
Prior Value
(4.4)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride Levels in Drinking Water
Value
Compared to:
Chloride Levels in Drinking Water Well: #11
Chloride Levels in Drinking Water Well: #11
72.0
Ppm
(2021)
Compared to:
Prior Value
(66.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride Levels in Drinking Water Well: #14
Chloride Levels in Drinking Water Well: #14
164.0
Ppm
(2021)
Compared to:
Prior Value
(160.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride Levels in Drinking Water Well: #16
Chloride Levels in Drinking Water Well: #16
78.0
Ppm
(2020)
Compared to:
Prior Value
(93.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride Levels in Drinking Water Well: #17
Chloride Levels in Drinking Water Well: #17
40.0
Ppm
(2020)
Compared to:
Prior Value
(74.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride Levels in Drinking Water Well: #26
Chloride Levels in Drinking Water Well: #26
38.0
Ppm
(2020)
Compared to:
Prior Value
(38.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride Levels in Drinking Water Well: #27
Chloride Levels in Drinking Water Well: #27
43.0
Ppm
(2020)
Compared to:
Prior Value
(43.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride Levels in Drinking Water Well: #6
Chloride Levels in Drinking Water Well: #6
93.0
Ppm
(2021)
Compared to:
Prior Value
(76.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride Levels in Drinking Water Well: #9
Chloride Levels in Drinking Water Well: #9
56.0
Ppm
(2021)
Compared to:
Prior Value
(73.0)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride levels in Surface Water – Yahara Lakes
Value
Compared to:
Chloride levels in Surface Water – Yahara Lakes Lake: Kegonsa
Chloride levels in Surface Water – Yahara Lakes Lake: Kegonsa
64
Ppm
(2022)
Compared to:
Prior Value
(63)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride levels in Surface Water – Yahara Lakes Lake: Mendota
Chloride levels in Surface Water – Yahara Lakes Lake: Mendota
52
Ppm
(2022)
Compared to:
Prior Value
(51)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride levels in Surface Water – Yahara Lakes Lake: Monona
Chloride levels in Surface Water – Yahara Lakes Lake: Monona
72
Ppm
(2022)
Compared to:
Prior Value
(67)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride levels in Surface Water – Yahara Lakes Lake: Waubesa
Chloride levels in Surface Water – Yahara Lakes Lake: Waubesa
72
Ppm
(2022)
Compared to:
Prior Value
(68)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Chloride levels in Surface Water – Yahara Lakes Lake: Wingra
Chloride levels in Surface Water – Yahara Lakes Lake: Wingra
120
Ppm
(2022)
Compared to:
Prior Value
(110)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Percentage of Beach Days Lost Due to Water Quality Issues
Value
Compared to:
Percentage of Beach Days Lost Due to Water Quality Issues County: Dane
Percentage of Beach Days Lost Due to Water Quality Issues County: Dane
15.6%
Percent of Days
(2021)
Compared to:
Prior Value
(4.3%)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
Road Salt Per Street Mile
Value
Compared to:
Road Salt Per Street Mile Census Place (City): Madison
Road Salt Per Street Mile Census Place (City): Madison
8.7
Tons Per Street Mile
(2020-2021)
Compared to:
Prior Value
(9.2)
Prior Value compares a measured value with the previously measured value. Confidence intervals were not taken into account in determining the direction of the comparison.
Trend
This comparison measures the indicator’s values over multiple time periods.<br>The Mann-Kendall Test for Statistical Significance is used to evaluate the trend<br>over 4 to 10 periods of measure, subject to data availability and comparability.
