LITTLE MANISTEE WATER QUALITY TESTING RESULTS
07/06/09
No. Site L.M. E. coli pH Ammon. Nitra Phos Dis.O2 Chlori Nitri
1 see below
2 >Fairbanks Cr 56 8.0 <0.25 <1 0.104 9.2
3 Fairbanks Cr, Old M63 Brg
4 >Twin Cr
5 Twin Cr
6 >Sayers Cr 81.6 8.0 <0.25 <1 <0.031 9.4
7 Sayers Cr
8 @Spencers Brg 79.8 8.0 <0.025 <1 <0.0254 9.3
9 @Johnson Brg 65 8.1 <0.25 <1 <0.0254 9.0
10 @Dewitt Brg
11 @Poggensee Br 59.4 8.1 <0.25 <1 <0.0254 9.4
12 >Cool Cr 64.4 8.0 <0.25 <1 <0.0254 9.4
13 Cool Cr@18Mi 178.5 8.0 <0.25 <1 <0.05 9.1
14 Cool Cr >Stronach
15 Stronach Cr above Cool Cr
16 Cool Cr @ Cool Lk
17 Cool Cr @ 12 Mi
18 Cool Cr @ 224.7 8.1 <0.25 <1 <0.0254 9.1
Hamilton Rd
19 @9 Mi Brg 85.5 8.0 <0.25 <1 <0.0254 9.2
20 @6 Mi Brg
21 @DNR Weir 31.3 8.1 <0.25 <1 0.027 9.5
22 @ Stronach Rd 32.8 8.1 <0.25 <1 0.028 9.5
CHEMICALS/COMPOUNDS IN TROUT STREAM ECOSYTEMS:
pH — a pH reading of 7 is neutral; anything higher is
slightly alkaline, lower acidic
Dissolved oxygen — there is a direct relationship
between dissolved oxygen (ppm) and water temperature...
higher water temperatures hold less oxygen.
Solubility of oxygen at sea-level and air-pressure of
760mm (29.92in) 29.38 at 500’ above sea-level
Air temperature - Oxygen PPM
32° F 14.6
41° F 12.8
50° F 11.3
A minimum of 4 ppm of dissolved oxygen is necessary
for a viable aquatic ecosystem. The following
chemicals/compounds in excess contribute to
eutrophication — excessive richness of nutrients
in a lake or other body of water, frequently due
to runoff from the land, which causes a dense
growth of plant life and death of animal life
from lack of oxygen. High quantities of nutrients
(sources: agricultural run-off, raw sewage, and
products high in phosphates, i.e. fertilizers and
cleaning products) create explosive growth in
aquatic plants, exceeding the BOD — biological
oxygen demand — the amount of oxygen required to
decompose organic material. Increasing the
abundance of nutrients in the water leads to an
increase in the demand for oxygen to decompose
the organic material. A BOD that exceeds the
available oxygen produces dangerous levels of
carbon dioxide.
Ammonia — quickly assimilated in moving water
Nitrate/nitrite — like ammonia most forms of
aquatic nitrogen break down in moving water
and the nitrogen is released into the atmosphere
Phosphates — indispensable for plant growth
– insufficiencies limit biological productivity.
In high concentrations can lead to the rupture
of blood vessels in aquatic organisms as well
as oxygen depletion in the water chemistry
—see BOD above
E. coli — elevates water
temperatures as oxygen is depleted to break
down the various compounds; increases growth
of aquatic plants adversely affecting the
ecosystem
07/06/09 Water Study
Additional information:
Site 1: < Luther Dam
E.Coli 26.5, pH 8.2, Ammon 0.4, Nitra 0.104.
Phos 0.104, Dis. Oxygen 9.3
