Water test results spanning from June to October
Presented as June 18th vs July 27th vs Aug 24th vs Oct 5th
Brief explanation of anagrams– DO – Dissolved Oxygen, EC – Electrical Conductivity, TDS -Total Dissolved Solids pH- Acidity. ORP- Oxidation Reduction Potential.
Rotary Park Duck Pond at water inflow site from industrial area
Lat 26.7993120 Sth
Long 153.1146835 East
Water temp NA vs NA vs 18.5 vs 20.3 deg C
pH 7.5 vs 7.9 vs 7.0 vs 7.0
EC 355 vs 170 vs 307 vs 275 uS/cm
TDS 252 vs 119 vs 218 vs 195 ppm
salinity 0.018% vs 0.008% vs 0.02% vs 0.014%
D.O. 89% vs 87% vs 79% vs 84%
ORP 320 vs 280 vs 237 vs 225 mV
KH Carbonate hardness 54 vs 36 vs 39 vs 71 ppm
GH General Hardness 90 vs 34 vs 51 vs 68 ppm
sulfate 30 vs <20 vs <20 vs <20 ppm
Chlorine 0 vs 0 vs 0 vs 0 ppm
Chloride NA vs 15 vs 90 vs 30 ppm
Nitrate (NH4) 0 vs 0 vs 0 vs 0 ppm
Nitrite (N02) NA vs NA vs NA vs 0.04 ppm
Ammonia (NH3) NA vs NA vs NA vs 0.12 ppm
Phosphate 0 vs 0 vs 0 vs 0.14 ppm
Chromium (VI) 12 vs 21 vs NA vs 8 ppb
Iron 581 vs 546 vs 930 vs 253 ppb
lead 5 vs 0 vs NA vs NA vs NA ppb
Copper 0 vs 0 vs 56 vs 0 ppb
Nickel NA vs NA vs NA vs 10 ppm
BIO-INDICATORS October 5th 2025 (indicate acceptable water quality with reduced
biodiversity)
Microscopy survey:
Microfibers 100 – 200 per ml, Protists 10 – 20 per ml, Nematodes nil per ml,
Cryptomonads 10 – 50 per ml, No cyanobacteria, No dinoflagellates, Copepods 2 –
5 per ml, diatoms 100 – 200 per ml, Daphnia (water fleas) nil per ml, Ostracod 10 –
20 per ml, No cyanobacterium, no green algae (Closterium, Spirogyra)
Macroinvertabrate survey:
Shrimp x 1
Gastropods x 2
Taxa richness 2
Pollution index 3
Signal score 3
PET score 0
Shows possible heavy pollution based on macroinvertebrate score
Duckhole creek (drain alongside Pelican Waters Blvd)
Lat 26.80797 Sth
Long 153.11478 East
Temp NA vs NA vs 18.2 deg C
pH 6.8 vs 7.35 vs 7.1 vs 7.4
EC 234 vs 369 vs 128 vs 210 uS/cm
TDS 177 vs 264 vs 91 vs 351 ppm
salinity 0.014% vs 0.02% vs 0.01% vs 0.024%
DO 73% vs 76.4% vs 49% vs 37%
KH Carbonate hardness 51 vs 69 vs 25 vs 180 ppm
GH General Hardness (Calcium and Magnesium) 68 vs 85 vs 34 vs 170 ppm
Sulfate <20 vs <20 vs <20 vs <20 ppm
Chloride NA vs NA vs 50 vs 40 ppm
Nitrate 0 vs 0 vs 0 vs 0 ppm
Nitrite NA vs NA vs NA vs 0 ppm
Ammonia NA vs NA vs NA vs 0.38 ppm
Phosphate 0 vs 0 vs 0 vs 005 ppm
iron 843 vs 213 vs 500 vs 223 ppb
Chromium (VI) 1 vs 21 vs NA vs 7 ppb
lead 6-9 vs 0 – 5 vs NA vs NA ppb
Copper NA vs 19 vs 0 vs 0 ppb
BIO-INDICATORS Duckhole creek (drain alongside Pelican Waters Blvd) 12/10/25
Microinvertebrates: copepods 0 per ml , diatoms 100 per ml, Pleurosigma, pennate;
green algae 100 per ml, cyanobacteria 0 per ml, cryptomonads 200 per ml, protists
20 per ml
Macroinvertebrate: Shrimp x 1
TAXA richness 1, Pollution index 3, SIGNAL score 3, PET score 0
Macroinvertebrate score Shows moderate pollution
Pelican creek south of concrete barrier
Lat 26.8135953 south
Long 153.1071210 East
Water temp 24.5 deg C
pH 7.0 vs 7.1 vs 8.1 vs 6.8
EC 15960 vs 15030 vs 2660 vs 2680 uS/cm
TDS sea water vs sea water vs 1890 vs 1900 ppm
Salinity 0.83% vs 0.75% vs 0.13% vs 0.13%
D.O. 76% vs 81% vs 69% vs 59%
ORP 125 vs 290 vs 240 vs 120 mV
KH Carbonate hardness 66 vs 74 vs 18 vs 49 ppm
GH General Hardness (Calcium and Magnesium) 1,600 vs 1,500 vs 360 vs 230 ppm
Very high Sulfate > 100 vs >100 vs >100 vs >100 ppm
Nitrate 0 vs 0 vs 0 vs 0 ppm
Phosphate 0 vs 0 vs 0 vs 0 ppm
Iron 562 ppb vs 290 ppb vs 690 vs 676 ppb
Chromium (VI) NA vs 9 vs NA vs 5 ppb
Copper NA vs 21 vs 19 vs 0 ppb
Lead >10 vs NA vs NA vs NA ppb
BIO-INDICATORS Pelican creek south of concrete barrier 26/8/25
Microinvertebrates: Copepods 10 – 50 per ml, No rotifers, nematodes +, no
cnidarians, occasional ostracods, no flatworms, diatoms 1000+ per ml, spirogyra
algae +++, cryptomonads 100+ per ml, protists 5-10 per ml
Macroinvertebrates: TAXA richness score 2 (severe pollution) : Pollution index 4
(severe pollution), SIGNAL score 2 (severe pollution), PET score 0 (severe pollution)
Snapping Turtle sign Lamerough Canal
Lat 26.8198978 south
Long 153.1017177 East
pH 7.0 vs 7.3 vs 6.8 vs 6.4
EC 9380 vs 9500 vs 2590 12410 uS/cm (brackish water)
TDS 6680 vs 6780 vs 1850 vs 8820 ppm (brackish water)
Salinity 0.47% vs 0.48% vs 0.13% vs 0.62% (brackish water)
D.O. 81% vs 80% vs 83% vs 62%
ORP 328 vs 337 vs 160 vs 180 mV
KH Carbonate hardness 61 vs 60 vs 40 vs 66 ppm
GH General Hardness 935 vs 950 vs 340 vs 1275 ppm
Sulfate > 100 vs > 100 vs >100 vs >100 ppm
Chloride NA vs 3000 vs 1000 ppm
Nitrate 0 vs 0 vs 0 vs 0.2 ppm
Ammonia NA vs NA vs NA vs 0.17 ppm
Phosphate 0 vs 0 vs 0 vs 8.2 ppm
Iron 715 vs 420 vs 654 vs 309 ppb
Chromium (VI) 8 vs 36 vs NA vs 10 ppb
Copper 0 ppb vs 0 ppb vs 27 vs 8 ppb
Lead (July only) >10 ppb vs NA vs NA vs NA
BIO-INDICATORS Pelican creek at Snapping Turtle sign 18/10/25
Microinvertebrates: copepods nil, ostracods nil, occasional protist (gastrotrich),
nematodes nil, cnidarians nil, flatworms nil, diatoms +++
Macroinvertebrates: TAXA richness score 1 (severe pollution) : Pollution index 2,
SIGNAL score 2 (possible severe pollution), PET score 0 (possible severe pollution)
Abandoned Sewage Farm
Lat 26.8248002 Sth
Long 153.1002173 East
pH 7.9 vs 7.2 vs 6.6 vs 7.9
EC 4430 vs 7510 vs 3370 vs 11420 uS/cm
TDS 3140 vs 5390 vs 2390 vs 8120 ppm
salinity 0.22% vs 0.38% vs 0.17% vs 0.57%
DO 87% 7.4 mg/L vs 83% vs 82% vs NA
KH Carbonate hardness 38 vs 36 vs 38 vs 68 ppm
GH General Hardness 544 vs 680 vs 270 vs 1190 ppm
Nitrate 7 vs 0 vs 0 vs 0 ppm
Phosphate 0.1 vs 0.25 vs 0 vs 0 ppm
Chloride NA vs 2200 vs 1200 vs 5500 ppm
Sulfate >100 vs >100 vs >100 vs >100 ppm
iron 850 vs 2200 vs 287 vs 55 ppb
Chromium (VI) 20 vs 37 vs NA vs 15 ppb
Copper 0 vs 0 vs 9 vs 10 ppb
Nickel 100 vs NA vs NA vs NA ppm
Manganese 0 vs 0.1 vs NA vs NA ppm
BIO-INDICATORS 7/9/25 (indicate possible severe pollution)
Microinvertebrates: no copepods, cryptomonads 100 per ml, protists 10 per ml, no
nematodes, no cnidarians, no ostracods, no flatworms, occasional diatoms
Macroinvertebrates: TAXA richness score 2 (possible severe pollution) : Pollution
index 4 (possible severe pollution), SIGNAL score 2 (possible severe pollution), PET
score 0 (possible severe pollution)
Pelican Waters Estate Golf Course Lake
Lat 26.8297231 South
Long 153.0932134 East
pH 7.6 vs 7.5 vs 6.9 vs 8.1
EC 2150 vs 3780 vs 3140 vs 5810 uS/cm
TDS 1530 vs 2690 vs 2230 vs 4140 ppm
Salinity 0.1% vs 0.19% vs 0.16% vs 0.29%
D.O. 80% vs 86% vs 84% vs NA
ORP 260 vs 232 vs 340 vs 232 mV
KH Carbonate hardness 72 vs 54 vs 48 vs 57 ppm
GH General Hardness 270 vs 408 vs 408 vs 646 ppm
Sulfate 90 vs >100 vs >100 vs > 100 ppm
Chloride NA vs 1000 vs NA vs 1500 ppm
Nitrate 5.0 vs 0.1 vs 0.0 vs 0 ppm
Phosphate 0.1 vs 0.0 vs 1.9 vs 0.1 ppm
Iron 12,700 vs 513 vs 261 vs 48 ppb
Pelican Waters Estate Golf Course Lake 7/9/25
BIO-INDICATORS (indicate severe pollution)
Microinvertebrates: no copepods, cryptomonads 10 per ml, protists 10 per ml,
nematodes 5 per ml, no cnidarians, no ostracods, no flatworms, no diatoms,
microfibers 10 per ml
Macroinvertebrates: TAXA richness score 2 (possible severe pollution) : Pollution
index 4 (possible severe pollution), SIGNAL score 2 (possible severe pollution), PET
score 0 (possible severe pollution)