55 / 60
O H A K U R I
K A R A P I R O
P U TA R U R U
H U K A F A L L S
AT I A M U R I
A R A P U N I
T O K O R O A
L A K E
TA U P O
HUKA TO OHAKURI
MAINSTEM
TRIBUTARIES
LAKE NGAHEWA
Water quality is safe for swimming and
good trout fishing; geothermal inputs have
contaminated lake sediments and some
tributaries; there are many high ecological
quality streams but nutrients levels are poor;
high level of riparian fencing on dairy farms;
Ngahewa has degraded water quality.
OHAKURI TO KARAPIRO
MAINSTEM
TRIBUTARIES
Water quality is safe for swimming in
the mainstem but not most tributaries;
six hydrolakes with good access support
recreation; cumulative effects of farm inputs
increasing; high degree of groundwater
allocation; eels manually transferred from
below Karapiro; high level of riparian fencing
on dairy farms.
MID WAIKATO
MAINSTEM
TRIBUTARIES
Water quality is safe for swimming only
in the mainstem in bathing season;
macroinvertebrate indicators reflect degraded
conditions; good access and signage on
mainstem and lake, efforts underway to
improve fish passage.
LAKE ROTOROA (HAMILTON)
Lake Rotoroa ecological integrity and water
quality degraded.
C+
B-
C+
B+
A-
B-
C+
C+
C+
B
C+
C
B-
C
C+
C+
C+
B+
B
C
C
C+
C
C+
C
C-
C+
C+
C+
C+
C+
C+
C+
C+
C
C+
C
C+
C
D
B-
C
D
C-
C
B-
C C
C
C
B
C+
D C-
* The upper Waikato River catchment grades are draft and
subject to ongoing work between Ngati Tuwharetoa, Raukawa,
Te Arawa River Iwi and the project team
*
*
53
Waikato River Authority
Five Year Report
2015