Lake Rotorua
Lake Rotorua in North Island, New Zealand has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.9 m visibility. Chlorophyll-a (algae): 3.7 µg/L.
- Clarity
- 2.9 m
Why Lake Rotorua has no A–F grade
Lake Rotorua in New Zealand is published with the authority's own measurements, not a LakeQuality letter. official authority class; not a LakeQuality A–F letter Sampling here has recorded water clarity and algae (chlorophyll-a), but not phosphorus.
A letter on the LakeQuality scale would be an invention, not an official class. Everything below that has been measured is still reported on this page.
Monitoring: the GLORIA inland-lake matchup archive (PANGAEA 948492).
Lake Rotorua is a lake in North Island County, New Zealand.
Source: the GLORIA inland-lake matchup archive (PANGAEA 948492) — not the EPA Water Quality Portal, last sampled 2018-01-19. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Lake Rotorua
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 9.5 ft. Chlorophyll-a: 3.7 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.9 m | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 3.7 µg/L | Not graded |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Rotorua
Compare lakeside cabins, hotels, and vacation rentals near Lake Rotorua in North Island, New Zealand — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Fishing Lake Rotorua
Frequently asked questions about Lake Rotorua
What is the water quality of Lake Rotorua?
- Lake Rotorua in North Island, New Zealand has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.9 m visibility. Chlorophyll-a (algae): 3.7 µg/L.
Is Lake Rotorua safe to swim in?
- Lake Rotorua has official nutrient and clarity measurements, not a bacteria swim class and not a safety clearance. Algal blooms, currents, and depth are not covered. Always check local notices before swimming.
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Where this data comes from
6 measurements from 3 monitoring stations, 2017–2018. Retrieved from the listed programme (not the EPA Water Quality Portal). See data sources on 2026-08-20.
Collected and reported by
- GLORIA (PANGAEA 948492)
pangaea-gloria6 samples · 2017–2018
Analytical methods
- PANGAEA GLORIA 2022 inland-lake chlorophyll-a and Secchi
Monitoring station identifiers (3)
GID_2298GID_2299GID_2380
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.