Maryland Pool Operator Study Guide
Questions and Answers Updated
2026/2027 Version | Verified Answers
1. TDS legal range - ANSWER ✅ max- 1,500 ppm
2. TDS ideal range - ANSWER ✅ 1,500 ppm
3. TDS method to decrease - ANSWER ✅ drain TDS
4. max pool temp for spa - ANSWER ✅ 104
5. Langelier saturation index formula - ANSWER ✅ pH+TA+CH+T-
12.1=saturation index
6. main source of disease causing organisms? - ANSWER ✅ bathers
7. oxidation - ANSWER ✅ the process of destroying inorganic compounds
that can cause eye irritation and odor in spa and pool water.
8. superchlorination
shock - ANSWER ✅ the practice of adding a sufficient amount of a
chlorinating compound to reduce cloudy water, slime, musty odor, algae,
and pathogens.
, 9. breakpoint chlorination - ANSWER ✅ a procedure used to reduce the
inorganic combined chlorine concentrations
10.Free chlorine legal range (pool, wading pool, and spa) - ANSWER ✅ pools:
1.5 ppm- 10.0 ppm
wading pools: 3.0 ppm- 10.0 ppm
spas- 4.0 ppm- 10.0 ppm
11.combined chlorine max - ANSWER ✅ 0.3 ppm
12.what is the reaction of bromine and water similar to? - ANSWER ✅
chlorine and water
13.bromine is much less dependant on what than chlorine for its reactivity? -
ANSWER ✅ pH Br vs. Cl
14.when testing for bromine, you only test for what? - ANSWER ✅ combined
bromine
15.what deactivates bromine? - ANSWER ✅ UV light.
16.at what speed compared to unstabilized chlorine does bromine react to UV
light - ANSWER ✅ slower - cyanuric acid stabilizes chlorine
bromine cant handle UV light
17.at what speed compared to stabilized chlorine does bromine react to UV
light - ANSWER ✅ faster
Questions and Answers Updated
2026/2027 Version | Verified Answers
1. TDS legal range - ANSWER ✅ max- 1,500 ppm
2. TDS ideal range - ANSWER ✅ 1,500 ppm
3. TDS method to decrease - ANSWER ✅ drain TDS
4. max pool temp for spa - ANSWER ✅ 104
5. Langelier saturation index formula - ANSWER ✅ pH+TA+CH+T-
12.1=saturation index
6. main source of disease causing organisms? - ANSWER ✅ bathers
7. oxidation - ANSWER ✅ the process of destroying inorganic compounds
that can cause eye irritation and odor in spa and pool water.
8. superchlorination
shock - ANSWER ✅ the practice of adding a sufficient amount of a
chlorinating compound to reduce cloudy water, slime, musty odor, algae,
and pathogens.
, 9. breakpoint chlorination - ANSWER ✅ a procedure used to reduce the
inorganic combined chlorine concentrations
10.Free chlorine legal range (pool, wading pool, and spa) - ANSWER ✅ pools:
1.5 ppm- 10.0 ppm
wading pools: 3.0 ppm- 10.0 ppm
spas- 4.0 ppm- 10.0 ppm
11.combined chlorine max - ANSWER ✅ 0.3 ppm
12.what is the reaction of bromine and water similar to? - ANSWER ✅
chlorine and water
13.bromine is much less dependant on what than chlorine for its reactivity? -
ANSWER ✅ pH Br vs. Cl
14.when testing for bromine, you only test for what? - ANSWER ✅ combined
bromine
15.what deactivates bromine? - ANSWER ✅ UV light.
16.at what speed compared to unstabilized chlorine does bromine react to UV
light - ANSWER ✅ slower - cyanuric acid stabilizes chlorine
bromine cant handle UV light
17.at what speed compared to stabilized chlorine does bromine react to UV
light - ANSWER ✅ faster
