Shallow Lakes Monitoring

Shallow Lake monitoring is targeted to show changes in water quality after restoration activities. Monitoring has shown dramatic increases in water clarity after restoration. Future monitoring activities will continue to document water quality and target waterbodies for future work.

Program Details

Sampling Results (2016 to 2025)

11,718

Number of Sites

Current Shallow Lakes Sites

SiteID	Site	County

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Shallow Lake Water Quality Summary 2016 to 2025

Summary statistics last calculated 4/23/2026 3:07:37 PM

Analyte	Units	# Results	Min	10th Percentile	25th Percentile	Median	75th Percentile	90th Percentile	Max	Max Sample Date	% Non-detection
Ammonia-nitrogen	mg/l	934	<0.00315	<0.031	<0.05	0.05	0.10115	0.2914	3.6	9/9/2019	44.97
Chloride	mg/l	81	0	0.5	2.22	9.28	22.6	31.2	45.41	5/16/2016	0.00
Chlorophyll a, free of pheophytin	ug/l	934	<0.7	2	7	28.96844	89.69	173.08	1457.6	6/13/2016	5.46
Depth, Secchi disk depth	m	842	0.01	0.1	0.22625	0.5	0.9	1.3	3.5	6/13/2016	0.00
Dissolved oxygen (DO)	mg/l	908	0.21	4.348	7.2975	8.95	10.8825	13.243	20.92	7/18/2022	0.00
Kjeldahl nitrogen	mg/l	934	<0.22	0.89	1.2	1.825	2.9	4.4	24	8/17/2021	0.43
Nitrate + Nitrite	mg/l	934	Not calculated when non-detections exceed 50%						24	5/6/2024	78.91
Orthophosphate	mg/l	934	Not calculated when non-detections exceed 50%						0.7	7/16/2024	59.42
pH	None	843	4.83	7.352	7.96	8.5	9.12	9.71	12.75	7/12/2016	0.00
Phycocyanin	ug/l	776	<0	<2	3.3	12	50.925	125.7	4500	6/28/2022	17.53
Temperature, water	deg C	913	9.008	15.006	19.569	22.3	25	26.769	32.4	7/8/2019	0.00
Total Dissolved Solids	mg/l	865	120	180.8	220	280	350	450	9440	6/12/2018	0.00
Total Suspended Solids	mg/l	932	<0	2	4	16	46	84.9	6190	7/11/2016	3.00
Turbidity	NTU	888	<0	1.167	2.4475	9.14	29.77	66.587	484.05	8/17/2021	0.11

Project Codes in this Program

Code	Description